V/162 LAMOST DR11 catalogs (Luo+, 2026)
The eleventh data release (DR11) of the LAMOST regular survey.
Luo A.-L., Zhao Y.-H., Zhao G., et al.
<Res. Astron Astrophys., in prep. (2026)>
=2026yCat.5162....0L 2026yCat.5162....0L
=2026RAA..in.prep..L
ADC_Keywords: Surveys ; Spectroscopy ; Photometry
Keywords: techniques: spectroscopic survey - data release - catalog
Description:
The Data Release Eleven of LAMOST Low-Resolution Spectroscopic Survey
(LRS).
The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST)
is a Chinese national scientific research facility operated by the
National Astronomical Observatories, Chinese Academy of Sciences. It
is a special reflecting Schmidt telescope with 4000 fibers in a field
of view of 20deg2 in the sky. Until July 2023, LAMOST has completed
its pilot survey, which was launched in October 2011 and ended in June
2012, and the regular survey of the first eleven years, which was
initiated on September 2012. In this data release, there are totally
11,931,197 low resolution spectra published, which satisfy the
selection criteria that the LAMOST LRS General Catalog also used. The
data products of this release can be available from the website
http://www.lamost.org/dr11/v2.0/, and they include:
1. Spectra. - There are 11,931,197 flux (relatively) - and
wavelength-calibrated, sky-subtracted spectra, including
11,570,626 stellar spectra, 277,566 galaxy spectra, and 83,005 quasar
spectra, and they cover the wavelength range of 3700Å-9000Å with
a resolution of 1800 at the 5500Å.
2. Spectroscopic Parameter Catalogs. - In this data release, 11
spectroscopic parameter catalogs are also published, and they are the
LAMOST LRS General Catalog, the LAMOST LRS Stellar Parameter Catalog
of A, F, G and K Stars, the LAMOST LRS Line-Index Catalog of A Type
Stars, the LAMOST LRS Catalog of gM, dM, and sdM Stars, the LAMOST LRS
Multiple Epoch Catalog, the LAMOST LRS Observed Plate Information
Catalog, the LAMOST LRS Input Catalog, the LAMOST LRS Catalog of
Cataclysmic Variable Stars, the LAMOST LRS Catalog of White Dwarf
Stars, the LAMOST LRS Catalog of Stellar Population Synthesis of
Galaxies, and LAMOST LRS Catalog of Emission Line Features of QSOs,
respectively. More than a hundred parameters are included in these
catalogs, such as right ascension, declination, signal to noise ratio
(S/N), Gaia source identifier and magnitudes, atmospheric parameters
(effective temperature, surface gravity, and metallicity), radial
velocity, element abundance, spectral line indices, line widths, the
metallicity sensitive parameter, and the magnetic activity flag.
Data Release Eleven of LAMOST Medium-Resolution Spectroscopic Survey
(MRS).
Since October 2018, LAMOST started the second stage survey program
(LAMOST II), which contains both low- and medium-resolution
spectroscopic surveys. LAMOST II takes about 50% nights (dark/gray
nights) to continue the previous low-resolution spectroscopic survey,
and another 50% nights (bright/gray nights) to conduct the
medium-resolution survey (MRS). For LAMOST MRS, it includes two
surveys, i.e., the time-domain and the non time-domain surveys. The
main purpose of the time-domain survey is to investigate variable
targets, which were repeatedly observed in several observation nights,
but targets of the non time-domain survey were observed only in one
night in general.
This time, 36,955,439 single exposure spectra and 9,997,571 coadded
spectra were obtained, which were written into 5,140,907 FITS files.
For objects close to the moon, spectra may be affected by the moon,
thus targets with the angular distances to the moon less than
10 degrees were not observed. For the non time-domain survey, there
are totally 2,737,394 coadded spectra published, and for the
time-domain survey, 10,418,656 single exposure spectra were released.
The data products of this data release can be available from the
website http://www.lamost.org/dr11/v2.0/, and they include:
1. Spectra. - For a target of MRS, we can get two spectra within an
exposure, including a blue (B) and a red (R) band spectrum, with their
wavelength ranges [4950Å,5350Å] and [6300Å,6800Å],
respectively, and these spectra have been sky-subtracted and
wavelength-calibrated. Generally, each object was observed several
times, and we would obtain the coadded B and R band spectra by combing
the single exposure spectra. Few targets, however, lack of the
spectral data of either band for some reason like the wavelength
calibration, only one even no coadded spectra exists in their FITS
file. For single exposure and coadd spectra, they both have a
resolution of 7500 respectively at 5163Å (blue) and 6593Å (red).
2. Spectroscopic Parameter Catalogs. - In this data release, five
spectroscopic parameter catalogs are published, and they are the
LAMOST MRS General Catalog, the LAMOST MRS Parameter Catalog, the
LAMOST MRS Multiple Epoch Catalog, the LAMOST MRS Observed Plate
Information Catalog, and the LAMOST MRS Input Catalog, respectively.
More than a hundred parameters are included in these catalogs, such as
right ascension, declination, signal to noise ratio (S/N), Gaia source
identifier and magnitudes, atmospheric parameters (effective
temperature, surface gravity, and metallicity), radial velocity,
element abundance, and dome seeing.
Acknowledging LAMOST in publications:
Please include the following in any published material that makes use
of the LAMOST data products:
Guoshoujing Telescope (the Large Sky Area Multi-Object Fiber
Spectroscopic Telescope LAMOST) is a National Major Scientific Project
built by the Chinese Academy of Sciences. Funding for the project has
been provided by the National Development and Reform Commission.
LAMOST is operated and managed by the National Astronomical
Observatories, Chinese Academy of Sciences.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
dr11l.dat 432 10000 LAMOST LRS General Catalog
dr11sl.dat 513 10000 LAMOST LRS A, F, G and K Star Catalog
dr11al.dat 678 10000 LAMOST LRS Line-Index Catalog of A Type Stars
dr11ml.dat 797 10000 LAMOST LRS Catalog of gM, dM, and sdM Stars
dr11cvl.dat 457 572 LAMOST LRS Catalog of Cataclysmic Variable Stars
dr11wdl.dat 456 10000 LAMOST LRS Catalog of White Dwarf Stars
dr11qsol.dat 2966 10000 LAMOST LRS Catalog of Emission Line Features
of QSOs
dr11gall.dat 746 10000 LAMOST LRS Catalog of Stellar Population
Synthesis of Galaxies
dr11mel.dat 2458 10000 LAMOST LRS Multiple Epoch Catalog
dr11pl.dat 193 6283 LAMOST LRS Observed Plate Information Catalog
dr11il.dat 322 10000 LAMOST LRS Input Catalog
dr11m.dat 486 10000 LAMOST MRS General Catalog
dr11sm.dat 765 10000 LAMOST MRS Parameter Catalogue
dr11mem.dat 14462 10000 LAMOST MRS Multiple Epoch Catalog
dr11pm.dat 311 2393 LAMOST MRS Observed Plate Information Catalog
dr11im.dat 300 10000 LAMOST MRS Input Catalog
--------------------------------------------------------------------------------
See also:
http://dr11.lamost.org : LAMOST DR11 Home Page
Byte-by-byte Description of file:dr11l.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 I10 --- ObsID [101001/1128116249] Unique Spectra ID
(obsid)
12- 26 A15 --- uID Unique source identifier calculated with
the "uRA" and "uDE" given in table
dr11mel.dat (uid)
28- 46 I19 --- gpID For each LAMOST source, the equatorial
coordinates ("uRA" and "uDE" in table
dr11mel.dat) used to calculate "uID" were
from which survey (Pan-STARRS, Gaia or
LAMOST), "gpID" gives the corresponding
source identifier in that survey (gp-id)
48- 66 A19 --- Target Target Designation, JHHMMSS.ss+DDMMSS.s
(designation)
68- 77 A10 "Y:M:D" Obs.Date Target Observation Date (obsdate)
79- 83 I5 d LMJD [55859/60111] Local Modified Julian Day
(lmjd)
85- 89 I5 d MJD [55858/60110] Modified Julian Day (mjd)
91- 110 A20 --- PlanID Plan Name (planid)
112- 113 I2 --- spID [1/16] Spectrograph ID (spid)
115- 117 I3 --- FiberID [1/250] Fiber ID (fiberid)
119- 132 F14.10 deg RAdeg Fiber Pointing Right Ascension (J2000)
(ra-obs)
134- 146 F13.10 deg DEdeg Fiber Pointing Declination (J2000)
(dec-obs)
148- 155 F8.2 --- snru ?=-9999 S/N of u filter (snru)
157- 164 F8.2 --- snrg ?=-9999 S/N of g filter (snrg)
166- 173 F8.2 --- snrr ?=-9999 S/N of r filter (snrr)
175- 182 F8.2 --- snri ?=-9999 S/N of i filter (snri)
184- 191 F8.2 --- snrz ?=-9999 S/N of z filter (snrz)
193- 198 A6 --- Class Spectral Type (class) (3)
200- 209 A10 --- subClass Stellar Sub-Class (subclass)
211- 226 F16.10 --- z []?=-9999 Redshift (z)
228- 246 F19.10 --- e_z []?=-9999 Redshift uncertainty (z-err)
248- 265 I18 --- PanSTARRS ? The objID in the Pan-STARRS (II/349)
catalog (ps-ID)
267- 281 F15.10 mag gmag ? Pan-STARRS g band magnitude (mag-ps-g)
283- 297 F15.10 mag rmag ? Pan-STARRS r band magnitude (mag-ps-r)
299- 313 F15.10 mag imag ? Pan-STARRS i band magnitude (mag-ps-i)
315- 329 F15.10 mag zmag ? Pan-STARRS z band magnitude (mag-ps-z)
331- 345 F15.10 mag ymag ? Pan-STARRS y band magnitude (mag-ps-y)
347- 365 I19 --- GaiaDR3 ?=-9999 Gaia DR3 (I/355) source identifier
(gaia-source-id)
367- 380 F14.8 mag Gmag ?=-9999 Mean G band magnitude from the
Gaia DR3 (I/355) catalog
(gaia-g-mean-mag)
382- 386 A5 --- FiberType Fiber Type of target (fibertype) (1)
388 I1 --- offsets [0/1] Whether there is a fiber offset
during observation (0=No, 1=Yes)
(offsets) (4)
390- 395 F6.3 arcsec offsetsv [0/99] If the "offsets" field is true,
"offsetsv" gives the offset distance from
the target's coordinator in input catalog
(table dr11il.dat) (offsets-v)
397- 410 F14.10 deg RAOdeg Right Ascension from input catalog (table
dr11il.dat) (ra)
412- 424 F13.10 deg DEOdeg Declination from input catalog (table
dr11il.dat) (dec)
426- 430 I5 --- FiberMask [-5966/5996] Possible fiber problems
(fibermask) (2)
432 I1 --- fNFlux [0/1] Whether the FITS file provides the
normalized flux (0=No, 1=Yes)
(with-norm-flux) (5)
--------------------------------------------------------------------------------
Note (1): Fiber type as follows:
Obj = the fiber is assigned to an object, including star, galaxy and
so on (11737900 occurrences)
Sky = the fiber is allocated to take skylight (0 occurrence)
F-std = the fiber is used to take the light of a flux calibration standard
star (193297 occurrences)
Unused = unused fiber (0 occurrence)
PosErr = wrong fiber position (0 occurrence)
Dead = out of commission (0 occurrence)
Note (2): The value field shall contain an integer, which is used to show the
problems of fibers. If you want to know the exact problem of a fiber, you
should first convert the decimal value of "FiberMask" to a nine-bit binary
number with bits as follows: 9 8 7 6 5 4 3 2 1.
If the value of a bit is 1, it represents the fiber has associated problem.
The associated fiber problem of each bit is:
---------------------------------------------------------
1 | NOALLOTTED | Fiber not allotted
2 | BADTRACE | Bad trace from the routine TRACECENTER
3 | BADFLAT | Low counts in flat field
4 | BADARC | Bad arc solution
5 | MANYBADPIXEL | >10% pixels are bad on CCD
6 | SATURATED | >10% pixels are saturated
7 | WHOPPER | Whopping fiber
8 | NEARWHOPPER | Near a whopping fiber
9 | BADSKYFIBER | Sky fiber shows extreme residuals
----------------------------------------------------------
Note (3): Spectral type occurrences as follows:
STAR = 11570626 occurrences
GALAXY = 277566 occurrences
QSO = 83005 occurrences
Note (4): The fiber-offset is usually applied for the very bright stars (r<11)
to avoid CCD saturation. Flag as follows:
0 = No offset (11717885 occurrences)
1 = Offset (213312 occurrences)
Note (5): Flag as follows:
0 = the FITS file does not provide the normalized flux (4033173 occurrences)
1 = the FITS file provides the normalized flux in the data array of
extension 1 (7898024 occurrences)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: dr11sl.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 I10 --- ObsID [101001/1128116245] Unique Spectra ID
(obsid)
12- 26 A15 --- uID Unique source identifier calculated with
the "uRA" and "uDE" given in table
dr11mel.dat (uid)
28- 46 I19 --- gpID For each LAMOST source, the equatorial
coordinates ("uRA" and "uDE" in table
dr11mel.dat) used to calculate "uID" were
from which survey (Pan-STARRS, Gaia or
LAMOST), "gpID" gives the corresponding
source identifier in that survey (gp-id)
48- 66 A19 --- Target Target Designation, JHHMMSS.ss+DDMMSS.s
(designation)
68- 77 A10 "Y:M:D" Obs.Date Target Observation Date (obsdate)
79- 83 I5 d LMJD [55859/60111] Local Modified Julian Day
(lmjd)
85- 89 I5 d MJD [55858/60110] Modified Julian Day (mjd)
91- 110 A20 --- PlanID Plan Name (planid)
112- 113 I2 --- spID [1/16] Spectrograph ID (spid)
115- 117 I3 --- FiberID [1/250] Fiber ID (fiberid)
119- 132 F14.10 deg RAdeg Fiber Pointing Right Ascension (J2000)
(ra-obs)
134- 146 F13.10 deg DEdeg Fiber Pointing Declination (J2000)
(dec-obs)
148- 155 F8.2 --- snru ?=-9999 S/N of u filter (snru)
157- 164 F8.2 --- snrg ?=-9999 S/N of g filter (snrg)
166- 173 F8.2 --- snrr ?=-9999 S/N of r filter (snrr)
175- 182 F8.2 --- snri ?=-9999 S/N of i filter (snri)
184- 191 F8.2 --- snrz ?=-9999 S/N of z filter (snrz)
193- 196 A4 --- Class [STAR] Spectral Type (class)
198- 199 A2 --- subClass Stellar Sub-Class (subclass) (4)
201- 213 F13.10 --- z [-0.002/0.002] Redshift (z)
215- 230 F16.10 --- e_z []?=-9999 Redshift Uncertainty (z-err)
232- 249 I18 --- PanSTARRS ? The objID in the Pan-STARRS (II/349)
catalog (ps-ID)
251- 265 F15.10 mag gmag [-999/28.3]? Pan-STARRS g band magnitude
(mag-ps-g)
267- 281 F15.10 mag rmag [-999/25.4]? Pan-STARRS r band magnitude
(mag-ps-r)
283- 297 F15.10 mag imag [-999/28.7]? Pan-STARRS i band magnitude
(mag-ps-i)
299- 313 F15.10 mag zmag [-999/27.8]? Pan-STARRS z band magnitude
(mag-ps-z)
315- 329 F15.10 mag ymag [-999/26.4]? Pan-STARRS y band magnitude
(mag-ps-y)
331- 349 I19 --- GaiaDR3 ?=-9999 Gaia DR3 (I/355) source identifier
(gaia-source-id)
351- 364 F14.8 mag Gmag ?=-9999 G-band mean magnitude from Gaia
DR3 (I/355) catalog (gaia-g-mean-mag)
366- 370 A5 --- FiberType Fiber Type of target (fibertype) (1)
372 I1 --- offsets [0/1] Whether there is a fiber offset
during observation (0=No, 1=Yes) (offsets)
(3)
374- 379 F6.3 arcsec offsetsv [0/99] If the "offsets" field is true,
"offsetsv" gives the offset distance from
the target's coordinator in input catalog
(table dr11il.dat) (offsets-v)
381- 394 F14.10 deg RAOdeg Right Ascension from input catalog
(table dr11il.dat) (ra)
396- 408 F13.10 deg DEOdeg Declination from input catalog
(table dr11il.dat) (dec)
410- 417 F8.2 K Teff [3241/13500] Effective temperature
obtained by the LASP (teff) (2)
419- 426 F8.2 K e_Teff ?=-9999 Teff uncertainty (teff-err)
428- 433 F6.3 [cm/s2] logg [-0.22/4.9] Surface gravity obtained by
the LASP (in dex) (logg) (2)
435- 443 F9.3 [cm/s2] e_logg ?=-9999 logg uncertainty (in dex)
(logg-err)
445- 450 F6.3 [-] [Fe/H] [-2.5/1] Metallicity obtained by the LASP
(in dex) (feh) (2)
452- 460 F9.3 [-] e_[Fe/H] ?=-9999[Fe/H] Uncertainty (in dex)
(feh-err)
462- 468 F7.2 km/s RV [-499.7/497.9] Heliocentric radial
velocity obtained by the LASP (rv) (2)
470- 477 F8.2 km/s e_RV ?=-9999 RV uncertainty (rv-err)
479- 490 F12.6 --- alpha ?=-9999 Alpha element abundance obtained
by the LASP (in dex) (alpha-m) (2)
492- 503 F12.6 --- e_alpha ?=-9999 alpha uncertainty (in dex)
(alpha-m-err)
505- 513 F9.3 km/s vsini ?=-9999 Projected rotation velocity
obtained by the LASP (vsini-lasp) (2)
--------------------------------------------------------------------------------
Note (1): Fiber type as follows:
Obj = the fiber is assigned to an object, including star, galaxy and
so on (7734595 occurrences)
Sky = the fiber is allocated to take skylight (0 occurrence)
F-std = the fiber is used to take the light of a flux calibration standard
star (163429 occurrences)
Unused = unused fiber (0 occurrence)
PosErr = wrong fiber position (0 occurrence)
Dead = out of commission (0 occurrence)
Note (2): The atmospheric parameters, radial velocities, alpha element
abundances, and projected rotational velocities for these spectra were
derived using the LAMOST Stellar Parameter Pipeline (LASP). Unlike the
calculations for "Teff", "logg", "[Fe/H]", and "RV", the calculation of
"alpha" employed MARCS theoretical spectra (Gustafsson+, 2008A&A...486..951G 2008A&A...486..951G)
as the template, while "vsini" was determined based on previously measured
atmospheric parameters & using PHOENIX Grides (Husser+, 2013A&A...553A...6H 2013A&A...553A...6H)
as the template. Additionally, the error for "vsini" will be provided
in future data releases.
Note (3): The fiber-offset is usually applied for the very bright stars (r<11)
to avoid CCD saturation. Flag as follows:
0 = No offset (7721344 occurrences)
1 = Offset (176680 occurrences)
Note (4): Subclass occurrences as follows:
A* = 430398 occurrences
F* = 2282221 occurrences
G* = 3742292 occurrences
K* = 1443113 occurrences
--------------------------------------------------------------------------------
Byte-by-byte Description of file: dr11al.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 I10 --- ObsID [101013/1128116176] Unique Spectra ID
(obsid)
12- 26 A15 --- uID Unique source identifier calculated with
the "uRA" and "uDE" given in table
dr11mel.dat (uid)
28- 46 I19 --- gpID For each LAMOST source, the equatorial
coordinates ("uRA" and "uDE" in table
dr11mel.dat) used to calculate "uID" were
from which survey (Pan-STARRS, Gaia or
LAMOST), "gpID" gives the corresponding
source identifier in that survey (gp-id)
48- 66 A19 --- Target Target Designation, JHHMMSS.ss+DDMMSS.s
(designation)
68- 77 A10 "Y:M:D" Obs.Date Target Observation Date (obsdate)
79- 83 I5 d LMJD [55859/60111] Local Modified Julian Day
(lmjd)
85- 89 I5 d MJD [55858/60110] Modified Julian Day (mjd)
91- 110 A20 --- PlanID Plan Name (planid)
112- 113 I2 --- spID [1/16] Spectrograph ID (spid)
115- 117 I3 --- FiberID [1/250] Fiber ID (fiberid)
119- 132 F14.10 deg RAdeg Fiber Pointing Right Ascension (J2000)
(ra-obs)
134- 146 F13.10 deg DEdeg Fiber Pointing Declination (J2000)
(dec-obs)
148- 155 F8.2 --- snru ?=-9999 S/N of u filter (snru)
157- 164 F8.2 --- snrg ?=-9999 S/N of g filter (snrg)
166- 173 F8.2 --- snrr ?=-9999 S/N of r filter (snrr)
175- 182 F8.2 --- snri ?=-9999 S/N of i filter (snri)
184- 191 F8.2 --- snrz ?=-9999 S/N of z filter (snrz)
193- 196 A4 --- Class [STAR] Spectral Type (class)
198- 201 A4 --- subClass Stellar Sub-Class (subclass) (1)
203- 218 F16.10 --- z ?=-9999 Redshift (z)
220- 236 F17.10 --- e_z ?=-9999 Redshift Uncertainty (z-err)
238- 255 I18 --- PanSTARRS ? The objID in the Pan-STARRS (II/349)
catalog (ps-ID)
257- 271 F15.10 mag gmag [-999/28.6]? Pan-STARRS g band magnitude
(mag-ps-g)
273- 287 F15.10 mag rmag [-999/23.2]? Pan-STARRS r band magnitude
(mag-ps-r)
289- 303 F15.10 mag imag [-999/28.61]? Pan-STARRS i band magnitude
(mag-ps-i)
305- 319 F15.10 mag zmag [-999/27.1]? Pan-STARRS z band magnitude
(mag-ps-z)
321- 335 F15.10 mag ymag [-999/25.4]? Pan-STARRS y band magnitude
(mag-ps-y)
337- 355 I19 --- GaiaDR3 ?=-9999 Gaia DR3 (I/355) source identifier
(gaia-source-id)
357- 370 F14.8 mag Gmag ?=-9999 G-band mean magnitude from Gaia
DR3 (I/355) catalog (gaia-g-mean-mag)
372- 376 A5 --- FiberType Fiber Type of target (fibertype) (2)
378 I1 --- offsets [0/1] Whether there is a fiber offset
during observation (0=No, 1=Yes)
(offsets) (3)
380- 384 F5.3 arcsec offsetsv [0/9] If the "offsets" field is true,
"offsetsv" gives the offset distance from
the target's coordinator in input catalog
(table dr11il.dat) (offsets-v)
386- 399 F14.10 deg RAOdeg Right Ascension from input catalog
(table dr11il.dat) (ra)
401- 413 F13.10 deg DEOdeg Declination from input catalog
(table dr11il.dat) (dec)
415- 424 F10.2 0.1nm KP12 [-118250/145753] Ca II K line index with
band widths of 12Å (kp12)
426- 435 F10.2 0.1nm KP18 [-118397/139873] Ca II K line index with
band widths of 18Å (kp18)
437- 445 F9.2 0.1nm KP6 [-63852/27334] Ca II K line index with
band widths of 6Å (kp6)
447- 455 F9.2 0.1nm Hdelta12 [-54589/35918] Hdelta Line Index with
band widths of 12Å (hdelta12)
457- 465 F9.2 0.1nm Hdelta24 [-80482/144199] Hdelta Line Index with
band widths of 24Å (hdelta24)
467- 476 F10.2 0.1nm Hdelta48 [-1e+06/144280] Hdelta Line Index with
band widths of 48Å (hdelta48)
478- 487 F10.2 0.1nm Hdelta64 [-1e+06/144312] Hdelta Line Index with
band widths of 64Å (hdelta64)
489- 497 F9.2 0.1nm Hgamma12 [-24449/40101] Hgamma Line Index with
band widths of 12Å (hgamma12)
499- 507 F9.2 0.1nm Hgamma24 [-49031/39932] Hgamma Line Index with
band widths of 24Å (hgamma24)
509- 518 F10.2 0.1nm Hgamma48 [-238912/42480] Hgamma Line Index with
band widths of 48Å (hgamma48)
520- 529 F10.2 0.1nm Hgamma54 [-238964/62075] Hgamma Line Index with
band widths of 54Å (hgamma54)
531- 540 F10.2 0.1nm Hbeta12 [-109289/19110] Hbeta Line Index with
band widths of 12Å (hbeta12)
542- 551 F10.2 0.1nm Hbeta24 [-112119/20585] Hbeta Line Index with
band widths of 24Å (hbeta24)
553- 562 F10.2 0.1nm Hbeta48 [-113648/118876] Hbeta Line Index with
band widths of 48Å (hbeta48)
564- 573 F10.2 0.1nm Hbeta60 [-114214/119278] Hbeta Line Index with
band widths of 60Å (hbeta60)
575- 582 F8.2 0.1nm Halpha12 ?=-9999 Halpha Line Index with band widths
of 12Å (halpha12)
584- 591 F8.2 0.1nm Halpha24 ?=-9999 Halpha Line Index with band widths
of 24Å (halpha24)
593- 601 F9.2 0.1nm Halpha48 [-16421/10365] Halpha Line Index with
band widths of 48Å (halpha48)
603- 611 F9.2 0.1nm Halpha70 [-16754/10495] Halpha Line Index with
band widths of 70Å (halpha70)
613- 621 F9.2 0.1nm Pa13 [-50904/27849] Paschen line index from
local continuum at 8467.5 with band widths
of 13.0Å (paschen13)
623- 631 F9.2 0.1nm Pa142 [-38106/1e+06] Paschen line index from
local continuum at 8598.0 with band widths
of 42.0Å (paschen142)
633- 642 F10.2 0.1nm Pa242 [-598443/290509] Paschen line index from
local continuum at 8751.0 with band widths
of 42.0Å (paschen242)
644- 651 F8.2 0.1nm HaD0.2 ?=-9999 Width at 20% below the local
continuum of Halpha line (halpha-d02)
653- 660 F8.2 0.1nm HbD0.2 ?=-9999 Width at 20% below the local
continuum of beta line (hbeta-d02)
662- 669 F8.2 0.1nm HgD0.2 ?=-9999 Width at 20% below the local
continuum of Hgamma line (hgamma-d02)
671- 678 F8.2 0.1nm HdD0.2 ?=-9999 Width at 20% below the local
continuum of Hdelta line (hdelta-d02)
--------------------------------------------------------------------------------
Note (1): Subclass occurrences as follows:
A = 14 occurrences
A0 = 12213 occurrences
A1 = 162975 occurrences
A2 = 115424 occurrences
A3 = 36089 occurrences
A5 = 103290 occurrences
A6 = 69476 occurrences
A7 = 131927 occurrences
A8 = 6538 occurrences
A9 = 23474 occurrences
Note (2): Note (1): Fiber type as follows:
Obj = the fiber is assigned to an object, including star, galaxy and
so on (625170 occurrences)
Sky = the fiber is allocated to take skylight (0 occurrence)
F-std = the fiber is used to take the light of a flux calibration standard
star (36250 occurrences)
Unused = unused fiber (0 occurrence)
PosErr = wrong fiber position (0 occurrence)
Dead = out of commission (0 occurrence)
Note (3): The fiber-offset is usually applied for the very bright stars (r<11)
to avoid CCD saturation. Flag as follows:
0 = No offset (638427 occurrences)
1 = Offset (22993 occurrences)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: dr11ml.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 I10 --- ObsID [101007/1128116236] Unique Spectra ID
(obsid)
12- 26 A15 --- uID Unique source identifier calculated with
the "uRA" and "uDE" given in table
dr11mel.dat (uid)
28- 46 I19 --- gpID For each LAMOST source, the equatorial
coordinates ("uRA" and "uDE" in table
dr11mel.dat) used to calculate "uID" were
from which survey (Pan-STARRS, Gaia or
LAMOST), "gpID" gives the corresponding
source identifier in that survey (gp-id)
48- 66 A19 --- Target Target Designation, JHHMMSS.ss+DDMMSS.s
(designation)
68- 77 A10 "Y:M:D" Obs.Date Target Observation Date (obsdate)
79- 83 I5 d LMJD [55859/60111] Local Modified Julian Day
(lmjd)
85- 89 I5 d MJD [55858/60110] Modified Julian Day (mjd)
91- 110 A20 --- PlanID Plan Name (planid)
112- 113 I2 --- spID [1/16] Spectrograph ID (spid)
115- 117 I3 --- FiberID [1/250] Fiber ID (fiberid)
119- 132 F14.10 deg RAdeg Fiber Pointing Right Ascension (J2000)
(ra-obs)
134- 146 F13.10 deg DEdeg Fiber Pointing Declination (J2000)
(dec-obs)
148- 155 F8.2 --- snru ?=-9999 S/N of u filter (snru)
157- 164 F8.2 --- snrg ?=-9999 S/N of g filter (snrg)
166- 173 F8.2 --- snrr ?=-9999 S/N of r filter (snrr)
175- 182 F8.2 --- snri ?=-9999 S/N of i filter (snri)
184- 191 F8.2 --- snrz ?=-9999 S/N of z filter (snrz)
193- 196 A4 --- Class [STAR] Spectral Type (class)
198- 201 A4 --- subClass Stellar Sub-Class (subclass) (1)
203- 218 F16.10 --- z ? Redshift estimated by the LAMOST
1D pipeline (z)
220- 235 F16.10 --- e_z ? Redshift uncertainty estimated by
the LAMOST 1D pipeline (z-err)
237- 254 I18 --- PanSTARRS ? The objID in the Pan-STARRS (II/349)
catalog (ps-ID)
256- 270 F15.10 mag gmag [-999/28.4]? Pan-STARRS g band magnitude
(mag-ps-g)
272- 286 F15.10 mag rmag [-999/22.92]? Pan-STARRS r band magnitude
(mag-ps-r)
288- 302 F15.10 mag imag [-999/27.9]? Pan-STARRS i band magnitude
(mag-ps-i)
304- 318 F15.10 mag zmag [-999/26.3]? Pan-STARRS z band magnitude
(mag-ps-z)
320- 334 F15.10 mag ymag [-999/24.6]? Pan-STARRS y band magnitude
(mag-ps-y)
336- 354 I19 --- GaiaDR3 ?=-9999 Gaia DR3 (I/355) source identifier
(gaia-source-id)
356- 369 F14.8 mag Gmag ?=-9999 G-band mean magnitude from Gaia
DR3 (I/355) catalog (gaia-g-mean-mag)
371- 375 A5 --- FiberType Fiber Type of target (fibertype) (2)
377 I1 --- offsets [0/1] Whether there is a fiber offset
during observation (0=No, 1=Yes)
(offsets) (3)
379- 384 F6.3 arcsec offsetsv [0/99] If the "offsets" field is true,
"offsetsv" gives the offset distance from
the target's coordinator in input catalog
(table dr11il.dat) (offsets-v)
386- 399 F14.10 deg RAOdeg Right Ascension from input catalog
(table dr11il.dat) (ra)
401- 413 F13.10 deg DEOdeg Declination from input catalog
(table dr11il.dat) (dec)
415- 422 F8.2 K Teff ?=-9999 Effective temperature obtained by
the minimum chi-square estimation (teff)
(4)
424- 431 F8.2 K e_Teff ?=-9999 Teff uncertainty estimated with
the method LASP used (teff-err)
433- 441 F9.3 [cm/s2] logg ?=-9999 Surface gravity obtained by the
minimu chi-square estimation (in dex)
(logg) (4)
443- 451 F9.3 [cm/s2] e_logg ?=-9999 logg uncertainty estimated with
the method LASP used (in dex) (logg-err)
453- 464 F12.6 [-] Z ?=-9999 Metallicity obtained by the
minimum chi-square estimation (m-h) (4)
466- 477 F12.6 [-] e_Z ?=-9999 Metallicity Uncertainty estimated
with the method LASP used (m-h-err)
479- 490 F12.6 0.1nm EWHa ?=-9999 Halpha line equivalent width (ewha)
(5)
492- 504 F13.6 0.1nm e_EWHa ?=-9999 EWHa uncertainty (ewha-err) (5)
506- 517 F12.6 --- TiO5 ?=-9999 Spectral index of TiO5 (tio5) (5)
519- 530 F12.6 --- CaH2 ?=-9999 Spectral index of CaH2 (cah2) (5)
532- 543 F12.6 --- CaH3 ?=-9999 Spectral index of CaH3 (cah3) (5)
545- 556 F12.6 --- TiO1 ?=-9999 Spectral index of TiO1 (tio1) (5)
558- 569 F12.6 --- TiO2 ?=-9999 Spectral index of TiO2 (tio2) (5)
571- 583 F13.6 --- TiO3 [-11124/597.3] Spectral index of TiO3
(tio3) (5)
585- 596 F12.6 --- TiO4 ?=-9999 Spectral index of TiO4 (tio4) (5)
598- 609 F12.6 --- CaH1 ?=-9999 Spectral index of CaH1 (cah1) (5)
611- 622 F12.6 --- CaOH ?=-9999 Spectral index of CaOH (caoh) (5)
624- 636 F13.6 --- e_TiO5 ?=-9999 TiO5 uncertainty (tio5-err) (5)
638- 650 F13.6 --- e_CaH2 ?=-9999 CaH2 uncertainty (cah2-err) (5)
652- 664 F13.6 --- e_CaH3 ?=-9999 CaH3 uncertainty (cah3-err) (5)
666- 678 F13.6 --- e_TiO1 ?=-9999 TiO1 uncertainty (tio1-err) (5)
680- 692 F13.6 --- e_TiO2 ?=-9999 TiO2 uncertainty (tio2-err) (5)
694- 706 F13.6 --- e_TiO3 ?=-9999 TiO3 uncertainty (tio3-err) (5)
708- 720 F13.6 --- e_TiO4 ?=-9999 TiO4 uncertainty (tio4-err) (5)
722- 734 F13.6 --- e_CaH1 ?=-9999 CAH1 uncertainty (cah1-err) (5)
736- 748 F13.6 --- e_CaOH ?=-9999 CaOH uncertainty (caoh-err) (5)
750- 761 F12.6 --- zeta ?=-9999 Metallicity sensitive parameter
(zeta) (5)
763- 775 F13.6 --- e_zeta ?=-9999 zeta uncertainty (zeta-err) (5)
777- 784 F8.2 --- MA [0/1]?=-9999 Magnetic activity (type) (6)
786- 797 F12.6 0.1nm NA ?=-9999 Line index of Na Line (na) (5)
--------------------------------------------------------------------------------
Note (1): Subclass as follows:
gM* = M giant (54914 occurrences)
dM* = M dwarf (867263 occurrences)
sdM* = M sub-dwarf (3871 occurrences)
Note (2): Fiber type as follows:
Obj = the fiber is assigned to an object, including star, galaxy and
so on (925971 occurrences)
Sky = the fiber is allocated to take skylight (0 occurrence)
F-std = the fiber is used to take the light of a flux calibration standard
star (77 occurrences)
Unused = unused fiber (0 occurrence)
PosErr = wrong fiber position (0 occurrence)
Dead = out of commission (0 occurrence)
Note (3): The fiber-offset is usually applied for the very bright stars (r<11)
to avoid CCD saturation. Flag as follows:
0 = No offset (917213 occurrences)
1 = Offset (8835 occurrences)
Note (4): See Du+ (2021RAA....21..202D 2021RAA....21..202D) for details on the he minimum
chi-square estimation. Here, an empirical LAMOST spectral library consisting
of 1365 high S/N spectra (Du+, 2024ApJS..275...42D 2024ApJS..275...42D) were used as templates
to estimate "Teff", "logg", and "Z", instead of the BT-Settl CIFIST2011
spectra from Allard+ (2012RSPTA.370.2765A 2012RSPTA.370.2765A).
Note (5): EW, spectral line indices, "zeta", and their errors were all given by
the HAMMER software described in Appendix A of
Covey+ (2007AJ....134.2398C 2007AJ....134.2398C, J/AJ/134/2398).
Note (6): "MA" and its error were given by the HAMMER software described in
Appendix A of Covey+ (2007AJ....134.2398C 2007AJ....134.2398C, J/AJ/134/2398). Flag as follows:
0 = M star with no magnetic activity (431623 occurrences)
1 = M star with magnetic activity (74459 occurrences)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: dr11cvl.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 I10 --- ObsID [312121/1127110202] Unique Spectra ID
(obsid)
12- 26 A15 --- uID Unique source identifier calculated with
the "uRA" and "uDE" given in table
dr11mel.dat (uid)
28- 46 I19 --- gpID For each LAMOST source, the equatorial
coordinates ("uRA" and "uDE" in table
dr11mel.dat) used to calculate "uID" were
from which survey (Pan-STARRS, Gaia or
LAMOST), "gpID" gives the corresponding
source identifier in that survey (gp-id)
48- 66 A19 --- Target Target Designation, JHHMMSS.ss+DDMMSS.s
(designation)
68- 77 A10 "Y:M:D" Obs.Date Target Observation Date (obsdate)
79- 83 I5 d LMJD [55859/60108] Local Modified Julian Day
(lmjd)
85- 89 I5 d MJD [55858/60107] Modified Julian Day (mjd)
91- 110 A20 --- PlanID Plan Name (planid)
112- 113 I2 --- spID [1/16] Spectrograph ID (spid)
115- 117 I3 --- FiberID [1/250] Fiber ID (fiberid)
119- 132 F14.10 deg RAdeg Fiber Pointing Right Ascension (J2000)
(ra-obs)
134- 146 F13.10 deg DEdeg Fiber Pointing Declination (J2000)
(dec-obs)
148- 155 F8.2 --- snru ?=-9999 S/N of u filter (snru)
157- 162 F6.2 --- snrg [0/546.8] S/N of g filter (snrg)
164- 169 F6.2 --- snrr [0/612.4] S/N of r filter (snrr)
171- 176 F6.2 --- snri [0/694.6] S/N of i filter (snri)
178- 183 F6.2 --- snrz [0/999] S/N of z filter (snrz)
185- 188 A4 --- Class [STAR] Spectral Type (class)
190- 191 A2 --- subClass [CV] Stellar Sub-Class (subclass)
193- 208 F16.10 --- z ?=-9999 Redshift (z)
210- 225 F16.10 --- e_z ?=-9999 Redshift Uncertainty (z-err)
227- 244 I18 --- PanSTARRS ? The objID in the Pan-STARRS (II/349)
catalog (ps-ID)
246- 260 F15.10 mag gmag [-999/22.8]? Pan-STARRS g band magnitude
(mag-ps-g)
262- 276 F15.10 mag rmag [-999/21.2]? Pan-STARRS r band magnitude
(mag-ps-r)
278- 292 F15.10 mag imag [-999/22.1]? Pan-STARRS i band magnitude
(mag-ps-i)
294- 308 F15.10 mag zmag [-999/21.6]? Pan-STARRS z band magnitude
(mag-ps-z)
310- 324 F15.10 mag ymag [-999/20.9]? Pan-STARRS y band magnitude
(mag-ps-y)
326- 344 I19 --- GaiaDR3 ?=-9999 Gaia DR3 (I/355) source identifier
(gaia-source-id)
346- 359 F14.8 mag Gmag ?=-9999 Mean G band magnitude from the
Gaia DR3 (I/355) catalog
(gaia-g-mean-mag)
361- 365 A5 --- FiberType Fiber Type of target (fibertype) (2)
367 I1 --- offsets [0/1] Whether there is a fiber offset
during observation (0=No, 1=Yes)
(offsets) (3)
369- 373 F5.3 arcsec offsetsv [0/1.47] If the "offsets" field is true,
"offsetsv" gives the offset distance from
the target's coordinator in input catalog
(table dr11il.dat) (offsets-v)
375- 388 F14.10 deg RAOdeg Right Ascension from input catalog (table
dr11il.dat) (ra)
390- 402 F13.10 deg DEOdeg Declination from input catalog (table
dr11il.dat) (dec)
404- 412 A9 --- cvClass Sub-types of cataclysmic variable stars
(cvclass) (1)
414- 429 F16.10 d Per ?=-9999 Orbital periods of cataclysmic
variable stars (period)
431- 435 I5 pc Dist ?=-9999 Heliocentric distance (r)
437- 444 F8.2 mag GMag ?=-9999 Absolute magnitude of Gaia G band
(abs-gmag)
446- 457 F12.6 mag e_GMag ?=-9999 GMag uncertainty (abs-gmag-err)
--------------------------------------------------------------------------------
Note (1): The description of sub-types for cataclysmic variable stars can be
found at: http://www.sai.msu.su/gcvs/gcvs/vartype.htm
Note (2): Fiber type as follows:
Obj = the fiber is assigned to an object, including star, galaxy and
so on (534 occurrences)
Sky = the fiber is allocated to take skylight (0 occurrence)
F-std = the fiber is used to take the light of a flux calibration standard
star (38 occurrences)
Unused = unused fiber (0 occurrence)
PosErr = wrong fiber position (0 occurrence)
Dead = out of commission (0 occurrence)
Note (3): The fiber-offset is usually applied for the very bright stars (r<11)
to avoid CCD saturation. Flag as follows:
0 = No offset (571 occurrences)
1 = Offset (1 occurrence)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: dr11wdl.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 I10 --- ObsID [101076/1127916232] Unique Spectra ID
(obsid)
12- 26 A15 --- uID Unique source identifier calculated with
the "uRA" and "uDE" given in table
dr11mel.dat (uid)
28- 46 I19 --- gpID For each LAMOST source, the equatorial
coordinates ("uRA" and "uDE" in table
dr11mel.dat) used to calculate "uID" were
from which survey (Pan-STARRS, Gaia or
LAMOST), "gpID" gives the corresponding
source identifier in that survey (gp-id)
48- 66 A19 --- Target Target Designation, JHHMMSS.ss+DDMMSS.s
(designation)
68- 77 A10 "Y:M:D" Obs.Date Target Observation Date (obsdate)
79- 83 I5 d LMJD [55859/60111] Local Modified Julian Day
(lmjd)
85- 89 I5 d MJD [55858/60110] Modified Julian Day (mjd)
91- 110 A20 --- PlanID Plan Name (planid)
112- 113 I2 --- spID [1/16] Spectrograph ID (spid)
115- 117 I3 --- FiberID [1/250] Fiber ID (fiberid)
119- 132 F14.10 deg RAdeg Fiber Pointing Right Ascension (J2000)
(ra-obs)
134- 146 F13.10 deg DEdeg Fiber Pointing Declination (J2000)
(dec-obs)
148- 155 F8.2 --- snru ?=-9999 S/N of u filter (snru)
157- 164 F8.2 --- snrg ?=-9999 S/N of g filter (snrg)
166- 173 F8.2 --- snrr ?=-9999 S/N of r filter (snrr)
175- 182 F8.2 --- snri ?=-9999 S/N of i filter (snri)
184- 191 F8.2 --- snrz ?=-9999 S/N of z filter (snrz)
193- 196 A4 --- Class [STAR] Spectral Type (class)
198- 199 A2 --- subClass [WD] Stellar Sub-Class (subclass)
201- 216 F16.10 --- z ?=-9999 Redshift (z)
218- 233 F16.10 --- e_z ?=-9999 Redshift Uncertainty (z-err)
235- 252 I18 --- PanSTARRS ? The objID in the Pan-STARRS (II/349)
catalog (ps-ID)
254- 268 F15.10 mag gmag [-999/23.1]? Pan-STARRS g band magnitude
(mag-ps-g)
270- 284 F15.10 mag rmag [-999/21.9]? Pan-STARRS r band magnitude
(mag-ps-r)
286- 300 F15.10 mag imag [-999/22.9]? Pan-STARRS i band magnitude
(mag-ps-i)
302- 316 F15.10 mag zmag [-999/22.6]? Pan-STARRS z band magnitude
(mag-ps-z)
318- 332 F15.10 mag ymag [-999/21.7]? Pan-STARRS y band magnitude
(mag-ps-y)
334- 352 I19 --- GaiaDR3 ?=-9999 Gaia DR3 (I/355) source identifier
(gaia-source-id)
354- 367 F14.8 mag Gmag ?=-9999 Mean G band magnitude from the
Gaia DR3 (I/355) catalog
(gaia-g-mean-mag)
369- 373 A5 --- FiberType Fiber Type of target (fibertype) (1)
375 I1 --- offsets [0/1] Whether there is a fiber offset
during observation (0=No, 1=Yes)
(offsets) (2)
377- 381 F5.3 arcsec offsetsv [0/6.71] If the "offsets" field is true,
"offsetsv" gives the offset distance from
the target's coordinator in input catalog
(table dr11il.dat) (offsets-v)
383- 396 F14.10 deg RAOdeg Right Ascension from input catalog (table
dr11il.dat) (ra)
398- 410 F13.10 deg DEOdeg Declination from input catalog (table
dr11il.dat) (dec)
412- 418 A7 --- wdClass Spectral sub-types of white dwarf stars
(wd-subclass) (3)
420- 427 F8.2 K Teff ?=-9999 Effective temperature obtained by
the least square fit (teff)
429- 436 F8.2 K e_Teff ?=-9999 Effective temperature uncertainty
obtained by the least-square fitting
algorithm (teff-err)
438- 446 F9.3 [cm/s2] logg ?=-9999 Surface gravity obtained by the
least square fit (logg)
448- 456 F9.3 [cm/s2] e_logg ?=-9999 Surface gravity uncertainty
obtained by the least-square fitting
algorithm (logg-err)
--------------------------------------------------------------------------------
Note (1): Fiber type as follows:
Obj = the fiber is assigned to an object, including star, galaxy and
so on (17365 occurrences)
Sky = the fiber is allocated to take skylight (0 occurrence)
F-std = the fiber is used to take the light of a flux calibration standard
star (136 occurrences)
Unused = unused fiber (0 occurrence)
PosErr = wrong fiber position (0 occurrence)
Dead = out of commission (0 occurrence)
Note (2): The fiber-offset is usually applied for the very bright stars (r<11)
to avoid CCD saturation. Flag as follows:
0 = No offset (17427 occurrences)
1 = Offset (74 occurrences)
Note (3): The "wdClass" field was determined by the machine learning method of
"LASSO+SVM" introduced in Kong+ (2018PASP..130h4203K 2018PASP..130h4203K, J/PASP/130/H4203).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: dr11qsol.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 I10 --- ObsID [102166/1127914246] Unique
Spectra ID (obsid)
12- 26 A15 --- uID Unique source identifier
calculated with the "uRA" and
"uDE" given in table dr11mel.dat
(uid)
28- 46 I19 --- gpID For each LAMOST source, the
equatorial coordinates ("uRA" and
"uDE" in table dr11mel.dat) used
to calculate "uID" were from
which survey (Pan-STARRS, Gaia or
LAMOST), "gpID" gives the
corresponding source identifier
in that survey (gp-id)
48- 66 A19 --- Target Target Designation,
JHHMMSS.ss+DDMMSS.s (designation)
68- 77 A10 "Y:M:D" Obs.Date Target Observation Date (obsdate)
79- 83 I5 d LMJD [55859/60111] Local Modified
Julian Day (lmjd)
85- 89 I5 d MJD [55858/60110] Modified Julian Day
(mjd)
91- 110 A20 --- PlanID Plan Name (planid)
112- 113 I2 --- spID [1/16] Spectrograph ID (spid)
115- 117 I3 --- FiberID [1/250] Fiber ID (fiberid)
119- 132 F14.10 deg RAdeg Fiber Pointing Right Ascension
(J2000) (ra-obs)
134- 146 F13.10 deg DEdeg Fiber Pointing Declination (J2000)
(dec-obs)
148- 155 F8.2 --- snru ?=-9999 S/N of u filter (snru)
157- 164 F8.2 --- snrg ?=-9999 S/N of g filter (snrg)
166- 173 F8.2 --- snrr ?=-9999 S/N of r filter (snrr)
175- 182 F8.2 --- snri ?=-9999 S/N of i filter (snri)
184- 191 F8.2 --- snrz ?=-9999 S/N of z filter (snrz)
193- 195 A3 --- Class [QSO] Spectral Type (class)
197- 205 A9 --- subClass Sub-Class (subclass) (3)
207- 222 F16.10 --- z ?=-9999 Redshift (z)
224- 239 F16.10 --- e_z ?=-9999 Redshift Uncertainty
(z-err)
241- 258 I18 --- PanSTARRS ? The objID in the Pan-STARRS
(II/349) catalog (ps-ID)
260- 274 F15.10 mag gmag [-999/25.3]? Pan-STARRS g band
magnitude (mag-ps-g)
276- 290 F15.10 mag rmag [-999/21.1]? Pan-STARRS r band
magnitude (mag-ps-r)
292- 306 F15.10 mag imag [-999/22.8]? Pan-STARRS i band
magnitude (mag-ps-i)
308- 322 F15.10 mag zmag [-999/22.6]? Pan-STARRS z band
magnitude (mag-ps-z)
324- 338 F15.10 mag ymag [-999/23.1]? Pan-STARRS y band
magnitude (mag-ps-y)
340- 358 I19 --- GaiaDR3 ?=-9999 Gaia DR3 (I/355) source
identifier (gaia-source-id)
360- 373 F14.8 mag Gmag ?=-9999 Mean G band magnitude from
the Gaia DR3 (I/355) catalog
(gaia-g-mean-mag)
375- 379 A5 --- FiberType Fiber Type of target (fibertype)
(2)
381 I1 --- offsets [0] Whether there is a fiber
offset during observation
(0=No, 1=Yes) (offsets)
383- 387 F5.3 arcsec offsetsv [0] If the "offsets" field is
true, "offsetsv" gives the offset
distance from the target's
coordinator in input catalog
(table dr11il.dat) (offsets-v)
389- 402 F14.10 deg RAOdeg Right Ascension from input
catalog (table dr11il.dat) (ra)
404- 416 F13.10 deg DEOdeg Declination from input catalog
(table dr11il.dat) (dec)
418- 435 F18.12 --- snrCont ?=-9999 Continuum S/N
(sn-ratio-conti)
437- 457 F21.12 --- FeUVNorm ?=-9999 Normalization parameter
of Fe II spectrum in UV band
(fe-uv-norm)
459- 476 F18.12 km/s FeUVFWHM ?=-9999 Rest-frame FWHM of Fe II
spectrum in UV band (fe-uv-fwhm)
478- 495 F18.12 0.1nm FeUVShift ?=-9999 Wavelength shift of Fe II
spectrum in UV band (fe-uv-shift)
497- 518 F22.12 --- FeOpNorm ?=-9999 Normalization parameter
of Fe II spectrum in optical band
(fe-op-norm)
520- 537 F18.12 km/s FeOpFWHM ?=-9999 Rest-frame FWHM of Fe II
spectrum in optical band
(fe-op-fwhm)
539- 556 F18.12 0.1nm FeOpShift ?=-9999 Wavelength shift of Fe II
spectrum in optical band
(fe-op-shift)
558- 580 F23.12 --- PLNorm ?=-9999 Normalization parameter
of AGN power law (pl-norm)
582- 599 F18.12 --- PLSlope ?=-9999 Slope of AGN power law
(pl-slope)
601- 618 F18.12 --- BalmerNorm ?=-9999 Normalization parameter
of Balmer continuum (balmer-norm)
620- 624 I5 --- Te ?=-9999 Electron temperature
(balmer-teff)
626- 643 F18.12 --- tau ?=-9999 Optical depth at the
Balmer edge of 3646Å
(balmer-tau-e)
645- 664 F20.12 --- Cont1 [-971915/1.65e+6] The coefficient
of the first term of the
third-order polynomial in the
continuum fitting (poly-a)
666- 683 F18.12 --- Cont2 ?=-9999 The coefficient of the
quadratic term of the third-order
polynomial in the continuum
fitting (poly-b)
685- 702 F18.12 --- Cont3 ?=-9999 The coefficient of the
cubic term of the third-order
polynomial in the continuum
fitting (poly-c)
704- 721 F18.12 --- L1350 ?=-9999 Continuum luminosity in
common logarithm at rest-frame
1350Å (l1350)
723- 740 F18.12 --- L3000 ?=-9999 Continuum luminosity in
common logarithm at rest-frame
3000Å (l3000)
742- 759 F18.12 --- L5100 ?=-9999 Continuum luminosity in
common logarithm at rest-frame
5100Å (l5100)
761- 764 A4 --- Name1 The name of the first group of
spectral lines (line-name-1)
766- 770 I5 --- Status1 ?=-9999 The fitting status of the
first group lines, and the value
larger than 0 means a success
fitting (fitting-status-1) (1)
772- 804 F33.12 --- Chi2m1 ?=-9999 Minimal chi-square in the
fitting of the first group lines
(min-chi2-1)
806- 836 F31.12 --- Chi2r1 ?=-9999 Reduced chi-square in the
fitting of the first group lines
(red-chi2-1)
838- 842 I5 --- DOF1 ?=-9999 Degree of freedom in the
fitting of the first group lines
(ndof-1)
844- 847 A4 --- Name2 The name of the second group of
spectral lines (line-name-2)
849- 853 I5 --- Status2 ?=-9999 The fitting status of the
second group lines, and the value
larger than 0 means a success
fitting (fitting-status-2) (1)
855- 886 F32.12 --- Chi2m2 ?=-9999 Minimal chi-square in the
fitting of the second group lines
(min-chi2-2)
888- 917 F30.12 --- Chi2r2 ?=-9999 Reduced chi-square in the
fitting of the second group lines
(red-chi2-2)
919- 923 I5 --- DOF2 ?=-9999 Degree of freedom in the
fitting of the second group lines
(ndof-2)
925- 928 A4 --- Name3 The name of the third group of
spectral lines (line-name-3)
930- 934 I5 --- Status3 ?=-9999 The fitting status of the
third group lines, and the value
larger than 0 means a success
fitting (fitting-status-3) (1)
936- 966 F31.12 --- Chi2m3 ?=-9999 Minimal chi-square in the
fitting of the third group lines
(min-chi2-3)
968- 996 F29.12 --- Chi2r3 ?=-9999 Reduced chi-square in the
fitting of the third group lines
(red-chi2-3)
998- 1002 I5 --- DOF3 ?=-9999 Degree of freedom in the
fitting of the third group lines
(ndof-3)
1004- 1007 A4 --- Name4 The name of the fourth group of
spectral lines (line-name-4)
1009- 1013 I5 --- Status4 ?=-9999 The fitting status of the
fourth group lines, and the value
larger than 0 means a success
fitting (fitting-status-4) (1)
1015- 1034 F20.12 --- Chi2m4 ?=-9999 Minimal chi-square in the
fitting of the fourth group lines
(min-chi2-4)
1036- 1054 F19.12 --- Chi2r4 ?=-9999 Reduced chi-square in the
fitting of the fourth group lines
(red-chi2-4)
1056- 1060 I5 --- DOF4 ?=-9999 Degree of freedom in the
fitting of the fourth group lines
(ndof-4)
1062- 1063 A2 --- Name5 The name of the fifth group of
spectral lines (line-name-5)
1065- 1069 I5 --- Status5 ?=-9999 The fitting status of the
fifth group lines, and the value
larger than 0 means a success
fitting (fitting-status-5) (1)
1071- 1075 I5 --- Chi2m5 ?=-9999 Minimal chi-square in the
fitting of the fifth group lines
(min-chi2-5)
1077- 1081 I5 --- Chi2r5 ?=-9999 Reduced chi-square in the
fitting of the fifth group lines
(red-chi2-5)
1083- 1087 I5 --- DOF5 ?=-9999 Degree of freedom in the
fitting of the fifth group lines
(ndof-5)
1089- 1090 A2 --- Name6 The name of the sixth group of
spectral lines (line-name-6)
1092- 1096 I5 --- Status6 ?=-9999 The fitting status of the
sixth group lines, and the value
larger than 0 means a success
fitting (fitting-status-6) (1)
1098- 1102 I5 --- Chi2m6 ?=-9999 Minimal chi-square in the
fitting of the sixth group lines
(min-chi2-6)
1104- 1108 I5 --- Chi2r6 ?=-9999 Reduced chi-square in the
fitting of the sixth group lines
(red-chi2-6)
1110- 1114 I5 --- DOF6 ?=-9999 Degree of freedom in the
fitting of the sixth group lines
(ndof-6)
1116- 1136 F21.12 10-10W/m3 FpeakLya-BR ?=-9999 Peak flux of Lya broad
component
(in 1e-17erg/s/cm2/Å)
(lya_br-1-peak-flux)
1138- 1155 F18.12 --- peakLya-BR ?=-9999 Peak wavelength in
natural logarithm of Lya broad
component
(lya_br-1-peak-wavelength)
1157- 1174 F18.12 --- sigmaLya-BR ?=-9999 Line dispersion in
natural logarithm of Lya broad
component (lya-br-1-sigma)
1176- 1195 F20.12 10-10W/m3 FpeakLya-NA ?=-9999 Peak flux of Lya narrow
component
(in 1e-17erg/s/cm2/Å)
(lya_na-1-peak-flux)
1197- 1214 F18.12 --- peakLya-NA ?=-9999 Peak wavelength in
natural logarithm of Lya narrow
component
(lya_na-1-peak-wavelength)
1216- 1233 F18.12 --- sigmaLya-NA ?=-9999 Line dispersion in
natural logarithm of Lya narrow
component (lya-na-1-sigma)
1235- 1254 F20.12 10-10W/m3 FpeakCIV-BR ?=-9999 Peak flux of CIV broad
component
(in 1e-17erg/s/cm2/Å)
(civ_br-1-peak-flux)
1256- 1273 F18.12 --- peakCIV-BR ?=-9999 Peak wavelength in
natural logarithm of C IV broad
component
(civ_br-1-peak-wavelength)
1275- 1292 F18.12 --- sigmaCIV-BR ?=-9999 Line dispersion in
natural logarithm of C IV broad
component (civ-br-1-sigma)
1294- 1312 F19.12 10-10W/m3 FpeakCIV-NA ?=-9999 Peak flux of C IV narrow
component
(in 1e-17erg/s/cm2/Å)
(civ_na-1-peak-flux)
1314- 1331 F18.12 --- peakCIV-NA ?=-9999 Peak wavelength in
natural logarithm of C IV narrow
component
(civ_na-1-peak-wavelength)
1333- 1350 F18.12 --- sigmaCIV-NA ?=-9999 Line dispersion in
natural logarithm of CIV narrow
component (civ-na-1-sigma)
1352- 1369 F18.12 10-10W/m3 FpeakCIII-BR1 ?=-9999 Peak flux of the first
C III broad component
(in 1e-17erg/s/cm2/Å)
(ciii_br-1-peak-flux)
1371- 1388 F18.12 --- peakCIII-BR1 ?=-9999 Peak wavelength in
natural logarithm of the first
III broad component
(ciii_br-1-peak-wavelength)
1390- 1407 F18.12 --- sigmaCIII-BR1 ?=-9999 Line dispersion in
natural logarithm of the first
C III broad component
(ciii-br-1-sigma)
1409- 1426 F18.12 10-10W/m3 FpeakCIII-BR2 ?=-9999 Peak flux of the second
C III broad component
(in 1e-17erg/s/cm2/Å)
(ciii_br-2-peak-flux)
1428- 1445 F18.12 --- peakCIII-BR2 ?=-9999 Peak wavelength in
natural logarithm of the second
C III broad component
(ciii_br-2-peak-wavelength)
1447- 1451 I5 10-10W/m3 FpeakCIII-NA1 ?=-9999 Peak flux of the first
C III narrow component
(in 1e-17erg/s/cm2/Å)
(ciii_na-1-peak-flux)
1453- 1457 I5 --- peakCIII-NA1 ?=-9999 Peak wavelength in
natural logarithm of the first
C III narrow component
(ciii_na-1-peak-wavelength)
1459- 1463 I5 --- sigmaCIII-NA1 ?=-9999 Line dispersion in
natural logarithm of the first
C III narrow component
(ciii-na-1-sigma)
1465- 1469 I5 10-10W/m3 FpeakCIII-NA2 ?=-9999 Peak flux of the second
C III narrow component
(in 1e-17erg/s/cm2/Å)
(ciii_na-2-peak-flux)
1471- 1475 I5 --- peakCIII-NA2 ?=-9999 Peak wavelength in
natural logarithm of the second
C III narrow component
(ciii_na-2-peak-wavelength)
1477- 1481 I5 --- sigmaCIII-NA2 ?=-9999 Line dispersion in
natural logarithm of the second
C III narrow component
(ciii-na-2-sigma)
1483- 1502 F20.12 10-10W/m3 FpeakMgII-BR ?=-9999 Peak flux of Mg II broad
component
(in 1e-17erg/s/cm2/Å)
(mgii_br-1-peak-flux)
1504- 1521 F18.12 --- peakMgII-BR ?=-9999 Peak wavelength in
natural logarithm of Mg II broad
component
(mgii_br-1-peak-wavelength)
1523- 1540 F18.12 --- sigmaMgII-BR ?=-9999 Line dispersion in
natural logarithm of Mg II broad
component (mgii-br-1-sigma)
1542- 1559 F18.12 10-10W/m3 FpeakMgII-NA1 ?=-9999 Peak flux of the first
Mg II narrow component
(in 1e-17erg/s/cm2/Å)
(mgii_na-1-peak-flux)
1561- 1578 F18.12 --- peakMgII-NA1 ?=-9999 Peak wavelength in
natural logarithm of the first
Mg II narrow component
(mgii_na-1-peak-wavelength)
1580- 1597 F18.12 --- sigmaMgII-NA1 ?=-9999 Line dispersion in
natural logarithm of the first
Mg II narrow component
(mgii-na-1-sigma)
1599- 1616 F18.12 10-10W/m3 FpeakMgII-NA2 ?=-9999 Peak flux of the second
Mg II narrow component
(in 1e-17erg/s/cm2/Å)
(mgii_na-2-peak-flux)
1618- 1635 F18.12 --- peakMgII-NA2 ?=-9999 Peak wavelength in
natural logarithm of the second
Mg II narrow component
(mgii_na-2-peak-wavelength)
1637- 1654 F18.12 --- sigmaMgII-NA2 ?=-9999 Line dispersion in
natural logarithm of the second
Mg II narrow component
(mgii-na-2-sigma)
1656- 1676 F21.12 10-10W/m3 FpeakHb-BR ?=-9999 Peak flux of Hbeta broad
component
(in 1e-17erg/s/cm2/Å)
(hb_br-1-peak-flux)
1678- 1695 F18.12 --- peakHb-BR ?=-9999 Peak wavelength in
natural logarithm of Hbeta broad
component
(hb_br-1-peak-wavelength)
1697- 1714 F18.12 --- sigmaHb-BR ?=-9999 Line dispersion in
natural logarithm of Hbeta broad
component (hb-br-1-sigma)
1716- 1736 F21.12 10-10W/m3 FpeakHb-NA ?=-9999 Peak flux of Hbeta narrow
component
(in 1e-17erg/s/cm2/Å)
(hb_na-1-peak-flux)
1738- 1755 F18.12 --- peakHb-NA ?=-9999 Peak wavelength in
natural logarithm of Hbeta narrow
component
(hb_na-1-peak-wavelength)
1757- 1774 F18.12 --- sigmaHb-NA ?=-9999 Line dispersion in
natural logarithm of Hbeta narrow
component (hb-na-1-sigma)
1776- 1795 F20.12 10-10W/m3 FpeakOIII-4959 ?=-9999 Peak flux of [O III] 4959
(in 1e-17erg/s/cm2/Å)
(oiii4959-1-peak-flux)
1797- 1814 F18.12 --- peakOIII-4959 ?=-9999 Peak wavelength in
natural logarithm of [O III] 4959
(oiii4959-1-peak-wavelength)
1816- 1833 F18.12 --- sigmaOIII-4959 ?=-9999 Line dispersion in
natural logarithm of [O III] 4959
(oiii4959-1-sigma)
1835- 1855 F21.12 10-10W/m3 FpeakOIII-5007 ?=-9999 Peak flux of [O III] 5007
(in 1e-17erg/s/cm2/Å)
(oiii5007-1-peak-flux)
1857- 1874 F18.12 --- peakOIII-5007 ?=-9999 Peak wavelength in
natural logarithm of [O III] 5007
(oiii5007-1-peak-wavelength)
1876- 1893 F18.12 --- sigmaOIII-5007 ?=-9999 Line dispersion in
natural logarithm of [O III] 5007
(oiii5007-1-sigma)
1895- 1913 F19.12 10-10W/m3 FpeakHa-BR1 ?=-9999 Peak flux of the first
Halpha broad component
(in 1e-17erg/s/cm2/Å)
(ha_br-1-peak-flux)
1915- 1932 F18.12 --- peakHa-BR1 ?=-9999 Peak wavelength in
natural logarithm of the first
Halpha broad component
(ha_br-1-peak-wavelength)
1934- 1951 F18.12 --- sigmaHa-BR1 ?=-9999 Line dispersion in
natural logarithm of the first
Halpha broad component
(ha-br-1-sigma)
1953- 1970 F18.12 10-10W/m3 FpeakHa-BR2 ?=-9999 Peak flux of the second
Halpha broad component
(in 1e-17erg/s/cm2/Å)
(ha_br-2-peak-flux)
1972- 1989 F18.12 --- peakHa-BR2 ?=-9999 Peak wavelength in
natural logarithm of the second
Halpha broad component
(ha_br-2-peak-wavelength)
1991- 2008 F18.12 --- sigmaHa-BR2 ?=-9999 Line dispersion in
natural logarithm of the second
Halpha broad component
(ha-br-2-sigma)
2010- 2027 F18.12 10-10W/m3 FpeakHa-BR3 ?=-9999 Peak flux of the third
Halpha broad component
(in 1e-17erg/s/cm2/Å)
(ha_br-3-peak-flux)
2029- 2046 F18.12 --- peakHa-BR3 ?=-9999 Peak wavelength in
natural logarithm of the third
Halpha broad component
(ha_br-3-peak-wavelength)
2048- 2065 F18.12 --- sigmaHa-BR3 ?=-9999 Line dispersion in
natural logarithm of the third
Halpha broad component
(ha-br-3-sigma)
2067- 2084 F18.12 10-10W/m3 FpeakHa-NA ?=-9999 Peak flux of Halpha
narrow component
(in 1e-17erg/s/cm2/Å)
(ha_na-1-peak-flux)
2086- 2103 F18.12 --- peakHa-NA ?=-9999 Peak wavelength in
natural logarithm of Halpha
narrow component
(ha_na-1-peak-wavelength)
2105- 2122 F18.12 --- sigmaHa-NA ?=-9999 Line dispersion in
natural logarithm of Halpha
narrow component (ha-na-1-sigma)
2124- 2141 F18.12 10-10W/m3 FpeakNII-6549 ?=-9999 Peak flux of [N II] 6549
(in 1e-17erg/s/cm2/Å)
(nii6549-1-peak-flux)
2143- 2160 F18.12 --- peakNII-6549 ?=-9999 Peak wavelength in
natural logarithm of [N II] 6549
(nii6549-1-peak-wavelength)
2162- 2179 F18.12 --- sigmaNII-6549 ?=-9999 Line dispersion in
natural logarithm of [N II] 6549
(nii6549-1-sigma)
2181- 2198 F18.12 10-10W/m3 FpeakNII-6585 ?=-9999 Peak flux of [N II] 6585
(in 1e-17erg/s/cm2/Å)
(nii6585-1-peak-flux)
2200- 2217 F18.12 --- peakNII-6585 ?=-9999 Peak wavelength in
natural logarithm of [N II] 6585
(nii6585-1-peak-wavelength)
2219- 2236 F18.12 --- sigmaNII-6585 ?=-9999 Line dispersion in
natural logarithm of [N II] 6585
(nii6585-1-sigma)
2238- 2259 F22.12 10-10W/m3 FpeakSII-6718 ?=-9999 Peak flux of [S II] 6718
(in 1e-17erg/s/cm2/Å)
(sii6718-1-peak-flux)
2261- 2278 F18.12 --- peakSII-6718 ?=-9999 Peak wavelength in
natural logarithm of [S II] 6718
(sii6718-1-peak-wavelength)
2280- 2297 F18.12 --- sigmaSII-6718 ?=-9999 Line dispersion in
natural logarithm of [S II] 6718
(sii6718-1-sigma)
2299- 2320 F22.12 10-10W/m3 FpeakSII-6732 ?=-9999 Peak flux of [S II] 6732
(in 1e-17erg/s/cm2/Å)
(sii6732-1-peak-flux)
2322- 2339 F18.12 --- peakSII-6732 ?=-9999 Peak wavelength in
natural logarithm of [S II] 6732
(sii6732-1-peak-wavelength)
2341- 2358 F18.12 --- sigmaSII-6732 ?=-9999 Line dispersion in
natural logarithm of [S II] 6732
(sii6732-1-sigma)
2360- 2377 F18.12 km/s FWHM-Lya ?=-9999 FWHM of entire Lya
(lya-fwhm)
2379- 2396 F18.12 km/s sigmaLya ?=-9999 Line dispersion of entire
Lya (lya-sigma)
2398- 2415 F18.12 0.1nm EW-Lya ?=-9999 EW of entire Lya (lya-ew)
2417- 2434 F18.12 0.1nm peakLya ?=-9999 Peak wavelenth of entire
Lya (lya-peak-wavelength)
2436- 2460 F25.12 10-3W/m2 FluxLya ?=-9999 Integrated Flux of entire
Lya (in erg/s/cm2) (lya-area)
2462- 2479 F18.12 km/s FWHM-CIV ?=-9999 FWHM of entire C IV
(civ-fwhm)
2481- 2498 F18.12 km/s sigmaCIV ?=-9999 Line dispersion of entire
C IV (civ-sigma)
2500- 2517 F18.12 0.1nm EW-CIV ?=-9999 EW of entire C IV (civ-ew)
2519- 2536 F18.12 0.1nm peakCIV ?=-9999 Peak wavelenth of entire
C IV (civ-peak-wavelength)
2538- 2560 F23.12 10-3W/m2 FluxCIV ?=-9999 Integrated Flux of entire
C IV (in erg/s/cm2) (civ-area)
2562- 2579 F18.12 km/s FWHM-CIII ?=-9999 FWHM of entire C III
(ciii-fwhm)
2581- 2598 F18.12 km/s sigmaCIII ?=-9999 Line dispersion of entire
C III (ciii-sigma)
2600- 2621 F22.12 0.1nm EW-CIII ?=-9999 EW of entire C III
(ciii-ew)
2623- 2640 F18.12 0.1nm peakCIII ?=-9999 Peak wavelenth of entire
C III (ciii-peak-wavelength)
2642- 2661 F20.12 10-3W/m2 FluxCIII ?=-9999 Integrated Flux of entire
C III (in erg/s/cm2) (ciii-area)
2663- 2680 F18.12 km/s FWHM-MgII ?=-9999 FWHM of entire Mg II
(mgii-fwhm)
2682- 2699 F18.12 km/s sigmaMgII ?=-9999 Line dispersion of entire
Mg II (mgii-sigma)
2701- 2718 F18.12 0.1nm EW-MgII ?=-9999 EW of entire Mg II
(mgii-ew)
2720- 2737 F18.12 0.1nm peakMgII ?=-9999 Peak wavelenth of entire
Mg II (mgii-peak-wavelength)
2739- 2762 F24.12 10-3W/m2 FluxMgII ?=-9999 Integrated Flux of entire
Mg II (in erg/s/cm2) (mgii-area)
2764- 2781 F18.12 km/s FWHM-Hb ?=-9999 FWHM of entire Hbeta
(hb-fwhm)
2783- 2800 F18.12 km/s sigmaHb ?=-9999 Line dispersion of entire
Hbeta (hb-sigma)
2802- 2822 F21.12 0.1nm EW-Hb ?=-9999 EW of entire Hbeta (hb-ew)
2824- 2841 F18.12 0.1nm peakHb ?=-9999 Peak wavelenth of entire
Hbeta (hb-peak-wavelength)
2843- 2866 F24.12 10-3W/m2 FluxHb ?=-9999 Integrated Flux of entire
Hbeta (in erg/s/cm2) (hb-area)
2868- 2885 F18.12 km/s FWHM-Ha ?=-9999 FWHM of entire Halpha
(ha-fwhm)
2887- 2904 F18.12 km/s sigmaHa ?=-9999 Line dispersion of entire
Halpha (ha-sigma)
2906- 2923 F18.12 0.1nm EW-Ha ?=-9999 EW of entire Halpha
(ha-ew)
2925- 2942 F18.12 0.1nm peakHa ?=-9999 Peak wavelenth of entire
Halpha (ha-peak-wavelength)
2944- 2966 F23.12 10-3W/m2 FluxHa ?=-9999 Integrated Flux of entire
Halpha (in erg/s/cm2) (ha-area)
--------------------------------------------------------------------------------
Note (1): From LAMOST DR11 documentation: "see
https://idlastro.gsfc.nasa.gov/ftp/pro/markwardt/mpfit.pro for other values"
The link is however obsolete. The following information on mpfit can be
found at: https://cow.physics.wisc.edu/~craigm/idl/down/mpfit.txt
STATUS - an integer status code is returned. All values greater
than zero can represent success (however STATUS EQ 5 may
indicate failure to converge). Possible values as follows:
1 = both actual and predicted relative reductions in the sum of squares
are at most FTOL, with FTOL being a nonnegative input variable which
measures the relative error desired in the sum of squares.
2 = relative error between two consecutive iterates is at most XTOL, with
XTOL being a nonnegative input variable which measures the relative
error desired in the approximate solution.
3 = conditions for STATUS = 1 and STATUS = 2 both hold.
4 = the cosine of the angle between the function vector (fvec) and any
column of the jacobian is at most GTOL in absolute value, with GTOL
being a nonnegative input variable which measures the orthogonality
desired between the function vector and the columns of the jacobian.
5 = the maximum number of iterations has been reached
Note (2): Fiber type as follows:
Obj = the fiber is assigned to an object, including star, galaxy and
so on (19122 occurrences)
Sky = the fiber is allocated to take skylight (0 occurrence)
F-std = the fiber is used to take the light of a flux calibration standard
star (15 occurrences)
Unused = unused fiber (0 occurrence)
PosErr = wrong fiber position (0 occurrence)
Dead = out of commission (0 occurrence)
Note (3): QSOs subclass occurrences as follows:
BROADLINE = 1 occurrence
Non = 19136 occurrences
--------------------------------------------------------------------------------
Byte-by-byte Description of file: dr11gall.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 I10 --- ObsID [14703017/1127916180] Unique Spectra
ID (obsid)
12- 26 A15 --- uID Unique source identifier calculated
with the "uRA" and "uDE" given in
table dr11mel.dat (uid)
28- 46 I19 --- gpID For each LAMOST source, the
equatorial coordinates ("uRA" and
"uDE" in table dr11mel.dat) used to
calculate "uID" were from which
survey (Pan-STARRS, Gaia or LAMOST),
"gpID" gives the corresponding
source identifier in that survey
(gp-id)
48- 66 A19 --- Target Target Designation,
JHHMMSS.ss+DDMMSS.s (designation)
68- 77 A10 "Y:M:D" Obs.Date Target Observation Date (obsdate)
79- 83 I5 d LMJD [55907/60111] Local Modified Julian
Day (lmjd)
85- 89 I5 d MJD [55906/60110] Modified Julian Day
(mjd)
91- 109 A19 --- PlanID Plan Name (planid)
111- 112 I2 --- spID [1/16] Spectrograph ID (spid)
114- 116 I3 --- FiberID [1/250] Fiber ID (fiberid)
118- 131 F14.10 deg RAdeg Fiber Pointing Right Ascension (J2000)
(ra-obs)
133- 145 F13.10 deg DEdeg Fiber Pointing Declination (J2000)
(dec-obs)
147- 154 F8.2 --- snru ?=-9999 S/N of u filter (snru)
156- 160 F5.2 --- snrg [0/95.1] S/N of g filter (snrg)
162- 167 F6.2 --- snrr [0/170.3] S/N of r filter (snrr)
169- 174 F6.2 --- snri [0/205.7] S/N of i filter (snri)
176- 183 F8.2 --- snrz ?=-9999 S/N of z filter (snrz)
185- 190 A6 --- Class [GALAXY] Spectral Type (class)
192- 194 A3 --- subClass [Non] Sub-Class (subclass)
196- 207 F12.10 --- z [0/0.8] Redshift (z)
209- 224 F16.10 --- e_z ?=-9999 Redshift Uncertainty (z-err)
226- 243 I18 --- PanSTARRS ? The objID in the Pan-STARRS
(II/349) catalog (ps-ID)
245- 259 F15.10 mag gmag [-999/23.3]? Pan-STARRS g band
magnitude (mag-ps-g)
261- 275 F15.10 mag rmag [-999/21.3]? Pan-STARRS r band
magnitude (mag-ps-r)
277- 291 F15.10 mag imag [-999/22.8]? Pan-STARRS i band
magnitude (mag-ps-i)
293- 307 F15.10 mag zmag [-999/21.8]? Pan-STARRS z band
magnitude (mag-ps-z)
309- 323 F15.10 mag ymag [-999/23.1]? Pan-STARRS y band
magnitude (mag-ps-y)
325- 343 I19 --- GaiaDR3 ?=-9999 Gaia DR3 (I/355) source
identifier (gaia-source-id)
345- 358 F14.8 mag Gmag ?=-9999 Mean G band magnitude from
the Gaia DR3 (I/355) catalog
(gaia-g-mean-mag)
360- 364 A5 --- FiberType Fiber Type of target (fibertype) (1)
366 I1 --- offsets [0] Whether there is a fiber offset
during observation (0=No, 1=Yes)
(offsets)
368- 372 F5.3 arcsec offsetsv [0] If the "offsets" field is true,
"offsetsv" gives the offset distance
from the target's coordinator in
input catalog (table dr11il.dat)
(offsets-v)
374- 387 F14.10 deg RAOdeg Right Ascension from input catalog
(table dr11il.dat) (ra)
389- 401 F13.10 deg DEOdeg Declination from input catalog (table
dr11il.dat) (dec)
403- 414 F12.10 10-3W/m2 FluxHb [0] Total integrated flux in the
Hbeta emission line (in erg/s/cm2)
(hbeta-flux)
416- 428 F13.10 0.1nm EW-Hb [0/81.61] EW of the Hbeta emission
line (hbeta-ew)
430- 441 F12.10 10-3W/m2 FluxOIII-4960 [0] Total integrated flux in the
[O III] 4960 emission line
(in erg/s/cm2) (oiii-4960-flux)
443- 456 F14.10 0.1nm EW-OIII-4960 [-18.1/97.5] EW of the [O III] 4960
emission line (oiii-4960-ew)
458- 469 F12.10 10-3W/m2 FluxOIII-5008 [0] Total integrated flux in the
[O III] 5008 emission line
(in erg/s/cm2) (oiii-5008-flux)
471- 484 F14.10 0.1nm EW-OIII-5008 [-14.4/290.4] EW of the [O III] 5008
emission line (oiii-5008-ew)
486- 497 F12.10 10-3W/m2 FluxNII-6550 [0] Total integrated flux in the
[N II] 6550 emission line
(in erg/s/cm2) (nii-6550-flux)
499- 512 F14.10 0.1nm EW-NII-6550 [-16.4/57.8] EW of the [N II] 6550
emission line (nii-6550-ew)
514- 525 F12.10 10-3W/m2 FluxHa [0] Total integrated flux in the
Halpha emission line (in erg/s/cm2)
(halpha-flux)
527- 540 F14.10 0.1nm EW-Ha [-22.8/498.4] EW of the Halpha
emission line (halpha-ew)
542- 553 F12.10 10-3W/m2 FluxNII-6585 [0] Total integrated flux in the
[N II] 6585 emission line
(in erg/s/cm2) (nii-6585-flux)
555- 568 F14.10 0.1nm EW-NII-6585 [-8.91/105.5] EW of the [N II] 6585
emission line (nii-6585-ew)
570- 581 F12.10 10-3W/m2 FluxSII-6718 [0] Total integrated flux in the
[S II] 6718 emission line
(in erg/s/cm2) (sii-6718-flux)
583- 596 F14.10 0.1nm EW-SII-6718 [-25.6/49.91] EW of the [S II] 6718
emission line (sii-6718-ew)
598- 609 F12.10 10-3W/m2 FluxSII-6733 [0] Total integrated flux in the
[S II] 6733 emission line
(in erg/s/cm2) (sii-6733-flux)
611- 623 F13.10 0.1nm EW-SII-6733 [-7.8/51.6] EW of the [S II] 6733
emission line (sii-6733-ew)
625- 646 F22.16 [Gyr] log(Age)L ?=-9999 Age, light-weighted (age-lw)
648- 669 F22.16 [Gyr] log(Age)M ?=-9999 Age, mass-weighted (age-mw)
671- 692 F22.16 [-] log([Z/H])L ?=-9999 Metallicity, light-weighted
(metal-lw)
694- 715 F22.16 [-] log([Z/H])M ?=-9999 Metallicity, mass-weighted
(metal-mw)
717- 731 F15.10 km/s sigVel [10.9/1000] Stellar velocity
dispersion (vsig)
733- 746 F14.10 km/s e_sigVel [0/424] sigVel uncertainty (vsig-err)
--------------------------------------------------------------------------------
Note (1): Fiber type as follows:
Obj = the fiber is assigned to an object, including star, galaxy and
so on (28777 occurrences)
Sky = the fiber is allocated to take skylight (0 occurrence)
F-std = the fiber is used to take the light of a flux calibration standard
star (3 occurrences)
Unused = unused fiber (0 occurrence)
PosErr = wrong fiber position (0 occurrence)
Dead = out of commission (0 occurrence)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: dr11mel.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- uID Unique source identifier calculated with
the "uRA" and "uDE" given in this table
(uid)
17- 30 F14.10 deg uRA Right ascension used to calculate "uID",
and it may be from Gaia (I/355),
Pan-STARRS (II/349), or LAMOST (J2000)
(ura)
32- 44 F13.10 deg uDE Declination used to calculate "uID", and
it may be from Gaia (I/355),
Pan-STARRS (II/349), or LAMOST (J2000)
(udec)
46- 64 I19 --- gpID For each LAMOST source, the equatorial
coordinates ("uRA" and "uDE" in this
table) used to calculate "uID" were from
which survey (Pan-STARRS (II/349),
Gaia (I/355) or LAMOST), "gpID" gives the
corresponding source identifier in that
survey (gp-id)
66- 67 I2 --- Nobs [2/42] Observation plan numbers for each
target with multiple epoch observations
(obs-number)
69- 490 A422 --- ObsIDlist The "ObsID" list (obsid-list)
492- 919 A428 --- mMJMlist Modified Julian Minute list of the middle
time of multiple exposure (midmjm-list)
921- 1213 A293 --- zlist Redshift list (z-list)
1215- 1570 A356 --- Tefflist Effective temperature list (teff-list)
1572- 1822 A251 --- logglist Surface gravity list (log-list)
1824- 2111 A288 --- [Fe/H]list Metallicity list (feh-list)
2113- 2405 A293 --- RVlist Radial velocity list (rv-list)
2407- 2458 A52 --- GaiaType Variability types obtained by
cross-matching with 11 Specific Object
Studies (SOS) tables of Gaia DR3 (I/355)
(gaia-vari-type-sos)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: dr11pl.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- pID [1/11281] Plate ID (pid)
7- 16 A10 "Y:M:D" Obs.Date Target observation date (obsdate)
18- 37 A20 --- PlanID Plan name (planid)
39- 49 F11.7 deg RAdeg Right ascension of center star (J2000) (ra)
51- 60 F10.7 deg DEdeg Declination of center star (J2000) (dec)
62- 67 F6.2 mag mag [-14.99/8.63] Magnitude of center star (mag)
69- 72 F4.2 --- Seeing [0/9] Seeing of the first exposure (seeing)
74- 184 A111 s ExpTime The total exposure time of n time exposures
(exptime)
186- 193 I8 --- LMJM [80436692/86559923] Local modified Julian
minute at the start time of each plate
(lmjm)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: dr11il.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 I10 --- ObsID [101001/1128116250] Unique spectrum ID
(obsid)
12- 21 A10 "Y:M:D" Obs.Date Target observation date (obsdate)
23- 42 A20 --- PlanID Plan name (planid)
44- 45 I2 --- spID [1/16] Spectrograph ID (spid)
47- 49 I3 --- FiberID [1/250] Fiber ID (fiberid)
51- 55 A5 --- unitID ID of 4000 fiber units (unitid)
57- 70 F14.10 deg RAdeg Fiber pointing right ascension (J2000)
(ra-obs)
72- 84 F13.10 deg DEdeg Fiber pointing declination (J2000)
(dec-obs)
86- 95 A10 --- objType Object type (objtype) (5)
97- 106 A10 --- magType Target magnitude type (magtype) (6)
108- 112 F5.2 mag mag1 [0/99] Associated magnitude 1 (mag1)
114- 118 F5.2 mag mag2 [0/99] Associated magnitude 2 (mag2)
120- 124 F5.2 mag mag3 [0/99] Associated magnitude 3 (mag3)
126- 130 F5.2 mag mag4 [0/99] Associated magnitude 4 (mag4)
132- 136 F5.2 mag mag5 [0/99] Associated magnitude 5 (mag5)
138- 142 F5.2 mag mag6 [0/99] Associated magnitude 6 (mag6)
144- 148 F5.2 mag mag7 [0/99] Associated magnitude 7 (mag7)
150- 159 A10 --- tSource Preliminary classification label for each
target used by the "fiber allocation
procedure" (tsource) (1)
161- 166 A6 --- FiberType Fiber type of target (fibertype) (3)
168- 181 A14 --- tFrom Further classification label for each
target used by the "fiber allocation
procedure" (tfrom) (2)
183- 255 A73 --- tComment Comment about each target
(target ID and/or observed equatorial
coordinate bias) (tcomment)
257 I1 --- offsets [0/1] Whether there is a fiber offset
during observation (0=No, 1=Yes) (offsets)
(4)
259- 264 F6.3 arcsec offsetsv [0/99] If the "offsets" field is true,
"offsetsv" gives the offset distance from
the target's coordinator in input
catalog (offsets-v)
266- 279 F14.10 deg RAOdeg Right ascension from input catalog (ra)
281- 293 F13.10 deg DEOdeg Declination from input catalog (dec)
295- 301 A7 --- Epoch [J2000.0] Epoch (epoch)
303- 322 A20 --- TName Unique ID for each targets in this catalog
(tname)
--------------------------------------------------------------------------------
Note (1): It generally denotes the organization and researcher who submits the
target, the research subject to which the target belongs, and so on.
Note (2): it generally denotes the astronomical catalogues where the targets
were chosen from, the target selection algorithm, and so on.
Note (3): Fiber type as follows:
Obj = the fiber is assigned to an object, including star, galaxy and
so on (16177076 occurrences)
Sky = the fiber is allocated to take skylight (4981205 occurrences)
F-std = the fiber is used to take the light of a flux calibration standard
star (257006 occurrences)
Unused = unused fiber (2416789 occurrences)
PosErr = wrong fiber position (1294174 occurrences)
Dead = out of commission (0 occurrence)
Note (4): The fiber-offset is usually applied for the very bright stars (r<11)
to avoid CCD saturation. Flag as follows:
0 = No offset (24832537 occurrences)
1 = Offset (293713 occurrences)
Note (5): The object types come directly from the original catalog providers
and are not listed nor described in the LAMOST documentation.
Note (6): This field gives the bands corresponding to the following magnitudes.
For example, magType=ugriz means mag1=u, mag2=g, mag3=r, mag4=i, mag5=z, and
mag6/mag7=NULL.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: dr11m.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- MObsID Unique ID for each medium-resolution
spectrum in each exposure (mobsid)
21- 30 I10 --- ObsID [588902003/1127016250] Unique spectrum ID
for each observation of each target
(obsid)
32- 46 A15 --- uID Unique source identifier calculated with
the "uRA" and "uDE" in table dr11mem.dat
(uid)
48- 66 I19 --- gpID For each LAMOST source, the equatorial
coordinates ("uRA" and "uDE" in table
dr11mem.dat) used to calculate "uID" were
from which survey (Pan-STARRS, Gaia or
LAMOST), "gpID" gives the corresponding
source identifier in that survey (gp-id)
68- 86 A19 --- Target Target designation, JHHMMSS.ss+DDMMSS.s
(designation)
88- 97 A10 "Y:M:D" Obs.Date Target observation date (obsdate)
99- 103 I5 d LMJD [58025/60105] Local modified Julian day
(lmjd)
105- 109 I5 d MJD [58024/60104] Modified Julian day (mjd)
111- 130 A20 --- PlanID Plan name (planid)
132- 133 I2 --- spID [1/16] Spectrograph ID (spid)
135- 137 I3 --- FiberID [1/250] Fiber ID (fiberid)
139- 146 I8 m LMJM [83555758/86551227]? Local modified Julian
minute (lmjm)
148 A1 --- Band Having two values of B and R, which
represent B and R band spectra (band) (1)
150- 163 F14.10 deg RAdeg Fiber Pointing Right Ascension (J2000)
(ra-obs)
165- 178 F14.10 deg DEdeg Fiber Pointing Declination (J2000)
(dec-obs)
180- 185 F6.2 --- snr [0/999] The median value of all pixel S/Ns
in B band spectrum or R band (snr)
187- 205 I19 --- GaiaDR3 ?=-9999 Gaia DR3 (I/355) source identifier
(gaia-source-id)
207- 220 F14.8 mag Gmag ?=-9999 Mean G band magnitude from the
Gaia DR3 (I/355) catalog
(gaia-g-mean-mag)
222- 234 F13.10 mag BPmag [2.9/24.2]? Mean BP magnitude from the
Gaia DR3 (I/355) catalog
(gaia-bp-mean-mag)
236- 248 F13.10 mag RPmag [1.7/22.8]? Mean RP magnitude from the
Gaia DR3 (I/355) catalog
(gaia-rp-mean-mag)
250- 254 A5 --- FiberType Fiber Type of target (fibertype) (2)
256 I1 --- offsets [0/1] Whether there is a fiber offset
during observation (0=No, 1=Yes) (offsets)
(3)
258- 262 F5.3 arcsec offsetsv [0/3.64] If the "offsets" field is true,
'"ffsetsv" gives the offset distance from
the target's coordinator in input catalog
(table dr11im.dat) (offsets-v)
264- 277 F14.10 deg RAOdeg Right Ascension from input catalog (table
dr11im.dat) (ra)
279- 292 F14.10 deg DEOdeg Declination from input catalog (table
dr11im.dat) (dec)
294- 301 F8.2 km/s RVb0 ?=-9999 Radial velocity of B band spectra
measured with 483 selected KURUCZ
synthetic templates (rv-b0)
303- 310 F8.2 km/s e_RVb0 ?=-9999 Uncertainty of RVb0 measured by
the method LASP used (rv-b0-err)
312- 319 F8.2 km/s RVb1 ?=-9999 Radial velocity after zero-point
correction of RVb0 (rv-b1)
321- 328 F8.2 km/s e_RVb1 ?=-9999 Uncertainty of RVb1 measured by
the error propagation (rv-b1-err)
330- 334 I5 --- fRVb ?=-9999 Radial velocity flag for B band
spectra (rv-b-flag)
336- 343 F8.2 km/s RVr0 ?=-9999 Radial velocity of R band spectra
measured with 483 selected KURUCZ
synthetic templates (rv-r0)
345- 352 F8.2 km/s e_RVr0 ?=-9999 Uncertainty of RVr0 measured by
the method LASP used (rv-r0-err)
354- 361 F8.2 km/s RVr1 ?=-9999 Radial velocity after zero-point
correction of RVr0 (rv-r1)
363- 370 F8.2 km/s e_RVr1 ?=-9999 Uncertainty of RVr1 measured by
the error propagation (rv-r1-err)
372- 376 I5 --- fRVr ?=-9999 Radial velocity flag for R band
spectra (rv-r-flag)
378- 385 F8.2 km/s RVbr0 ?=-9999 Radial velocity of B and R band
spectra measured with 483 selected KURUCZ
synthetic templates (rv-br0)
387- 394 F8.2 km/s e_RVbr0 ?=-9999 Uncertainty of RVbr0 measured by
the method LASP used (rv-br0-err)
396- 403 F8.2 km/s RVbr1 ?=-9999 Radial velocity after zero-point
correction of RVbr0 (rv-br1)
405- 412 F8.2 km/s e_RVbr1 ?=-9999 Uncertainty of RVbr1 measured by
the error propagation (rv-br1-err)
414- 418 I5 --- fRVbr ?=-9999 Radial velocity flag for B and R
band spectra (rv-br-flag)
420- 427 F8.2 km/s RVlasp0 ?=-9999 Radial velocity measured by LASP
(rv-lasp0)
429- 436 F8.2 km/s e_RVlasp0 ?=-9999 Uncertainty of RVlasp0 also given
by the LASP used (rv-lasp0-err)
438- 445 F8.2 km/s RVlasp1 ?=-9999 Radial velocity after zero-point
correction of RVlasp0 (rv-lasp1)
447- 454 F8.2 km/s e_RVlasp1 ?=-9999 Uncertainty of RVlasp1 measured by
the error propagation (rv-lasp1-err)
456 I1 --- coadd [0/1] A flag to show whether it is a coadd
spectrum (0=No, 1=Yes) (coadd) (7)
458- 462 I5 --- FiberMask ?=-9999 Possible fiber problems (fibermask)
(4)
464 I1 --- badB [0] A flag to show whether the B band
spectra is problematic (0=No, 1=Yes)
(bad-b)
466 I1 --- badR [0] A flag to show whether the B band
spectra is problematic (0=No, 1=Yes)
(bad-r)
468- 472 F5.1 deg SepMoon [10.2/173.2] Angular distance of each
target to the moon (moon-angle)
474- 475 I2 --- DateMoon [7/24] The date of Chinese lunar calendar,
which represents the moon phase (5)
477 I1 --- f_SepMoon [0/1] Flag on SepMoon (6)
479- 486 A8 --- subproj The sub-project names of LAMOST
Medium-Resolution Spectroscopic Survey
--------------------------------------------------------------------------------
Note (1): Band occurrences as follows:
B = 23409377 occurrences
R = 23543633 occurrences
Note (2): Fiber type as follows:
Obj = the fiber is assigned to an object, including star, galaxy and
so on (45615371 occurrences)
Sky = the fiber is allocated to take skylight (0 occurrence)
F-std = the fiber is used to take the light of a flux calibration standard
star (1337639 occurrences)
Unused = unused fiber (0 occurrence)
PosErr = wrong fiber position (0 occurrence)
Dead = out of commission (0 occurrence)
Note (3): The fiber-offset is usually applied for the very bright stars (r<11)
to avoid CCD saturation. Flag as follows:
0 = No offset (46948158 occurrences)
1 = Offset (4852 occurrences)
Note (4): The value field shall contain an integer, which is used to show the
problems of fibers. If you want to know the exact problem of a fiber, you
should first convert the decimal value of "FiberMask" to a nine-bit binary
number with bits as follows: 9 8 7 6 5 4 3 2 1.
If the value of a bit is 1, it represents the fiber has associated problem.
The associated fiber problem of each bit is:
---------------------------------------------------------
1 | NOALLOTTED | Fiber not allotted
2 | BADTRACE | Bad trace from the routine TRACECENTER
3 | BADFLAT | Low counts in flat field
4 | BADARC | Bad arc solution
5 | MANYBADPIXEL | >10% pixels are bad on CCD
6 | SATURATED | >10% pixels are saturated
7 | WHOPPER | Whopping fiber
8 | NEARWHOPPER | Near a whopping fiber
9 | BADSKYFIBER | Sky fiber shows extreme residuals
----------------------------------------------------------
Note (5): Each month of the Chinese lunar calendar corresponds to a full cycle
of the Moon (which is 29.5 days) and is therefore either 29 or 30 days long.
The months start on a New Moon (Day 1) and end on one (Day 29∼30) so a Full
Moon falls in the middle of the month (Day 14∼15).
Note (6): Flag as follows:
1 = Angular distance is in the range of [10deg, 30deg] (3721521 occurrences)
0 = Angular distance is larger than 30deg (43231489 occurrences)
Note (7): Flag as follows:
0 = Single exposure spectrum (36955439 occurrences)
1 = Coadd spectrum (9997571 occurrences)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: dr11sm.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- MObsID Unique ID for each medium-resolution
spectrum in each exposure (mobsid)
13- 22 I10 --- ObsID [588902003/1127016245] Unique spectrum ID
for each observation of each target
(obsid)
24- 38 A15 --- uID Unique source identifier calculated with
the "uRA" and "uDE" in table dr11mem.dat
(uid)
40- 58 I19 --- gpID For each LAMOST source, the equatorial
coordinates ("uRA" and "uDE" in table
dr11mem.dat) used to calculate "uID" were
from which survey (Pan-STARRS, Gaia or
LAMOST), "gpID" gives the corresponding
source identifier in that survey (gp-id)
60- 78 A19 --- Target Target designation, JHHMMSS.ss+DDMMSS.s
(designation)
80- 89 A10 "Y:M:D" Obs.Date Target observation date (obsdate)
91- 95 I5 d LMJD [58025/60105] Local modified Julian day
(lmjd)
97- 101 I5 d MJD [58024/60104] Modified Julian day (mjd)
103- 122 A20 --- PlanID Plan name (planid)
124- 125 I2 --- spID [1/16] Spectrograph ID (spid)
127- 129 I3 --- FiberID [1/250] Fiber ID (fiberid)
131 A1 --- Band Having two values of B and R, which
represent B and R band spectra (band) (1)
133- 146 F14.10 deg RAdeg Fiber Pointing Right Ascension (J2000)
(ra-obs)
148- 161 F14.10 deg DEdeg Fiber Pointing Declination (J2000)
(dec-obs)
163- 168 F6.2 --- snr [0/999] The median value of all pixel
S/Ns in B band spectrum or R band (snr)
170- 188 I19 --- GaiaDR3 ?=-9999 Gaia DR3 (I/355) source
identifier (gaia-source-id)
190- 203 F14.8 mag Gmag ?=-9999 Mean G band magnitude from the
Gaia DR3 (I/355) catalog
(gaia-g-mean-mag)
205- 217 F13.10 mag BPmag [4.9/22.6]? Mean BP magnitude from the
Gaia DR3 (I/355) catalog
(gaia-bp-mean-mag)
219- 231 F13.10 mag RPmag [3.9/20.2]? Mean RP magnitude from the
Gaia DR3 (I/355) catalog
(gaia-rp-mean-mag)
233- 237 A5 --- FiberType Fiber Type of target (fibertype) (2)
239 I1 --- offsets [0/1] Whether there is a fiber offset
during observation (0=No, 1=Yes)
(offsets) (3)
241- 245 F5.3 arcsec offsetsv [0/3.64] If the "offsets" field is true,
"offsetsv" gives the offset distance from
the target's coordinator in input catalog
(table dr11im.dat) (offsets-v)
247- 260 F14.10 deg RAOdeg Right Ascension from input catalog (table
dr11im.dat) (ra)
262- 275 F14.10 deg DEOdeg Declination from input catalog (table
dr11im.dat) (dec)
277- 284 F8.2 K Tefflasp ?=-9999 Effective temperature given by
the LASP (teff-lasp)
286- 293 F8.2 K e_Tefflasp ?=-9999 Tefflasp uncertainty
(teff-lasp-err)
295- 303 F9.3 [cm/s2] logglasp ?=-9999 Surface gravity given by the LASP
(logg-lasp)
305- 313 F9.3 [cm/s2] e_logglasp ?=-9999 logglasp uncertainty
(logg-lasp-err)
315- 323 F9.3 [-] [Fe/H]lasp ?=-9999 Metallicity given by the LASP
(feh-lasp)
325- 333 F9.3 [-] e_[Fe/H]lasp ?=-9999[Fe/H] lasp uncertainty
(feh-lasp-err)
335- 343 F9.3 km/s vsinilasp ?=-9999 Projected rotation velocity given
by the LASP (vsini-lasp)
345- 353 F9.3 km/s e_vsinilasp ?=-9999 vsinilasp uncertainty
(vsini-lasp-err)
355- 362 F8.2 km/s RVb0 ?=-9999 Radial velocity of B band spectra
measured with 483 selected KURUCZ
synthetic templates (rv-b0)
364- 371 F8.2 km/s e_RVb0 ?=-9999 Uncertainty of RVb0 measured by
the method LASP used (rv-b0-err)
373- 380 F8.2 km/s RVb1 ?=-9999 Radial velocity after zero-point
correction of RVb0 (rv-b1)
382- 389 F8.2 km/s e_RVb1 ?=-9999 Uncertainty of RVb1 measured by
the error propagation (rv-b1-err)
391- 395 I5 --- fRVb ?=-9999 Radial velocity flag for B band
spectra (rv-b-flag)
397- 404 F8.2 km/s RVr0 ?=-9999 Radial velocity of R band spectra
measured with 483 selected KURUCZ
synthetic templates (rv-r0)
406- 413 F8.2 km/s e_RVr0 ?=-9999 Uncertainty of RVr0 measured by
the method LASP used (rv-r0-err)
415- 422 F8.2 km/s RVr1 ?=-9999 Radial velocity after zero-point
correction of RVr0 (rv-r1)
424- 431 F8.2 km/s e_RVr1 ?=-9999 Uncertainty of RVr1 measured by
the error propagation (rv-r1-err)
433- 437 I5 --- fRVr ?=-9999 Radial velocity flag for R band
spectra (rv-r-flag)
439- 446 F8.2 km/s RVbr0 ?=-9999 Radial velocity of B and R band
spectra measured with 483 selected KURUCZ
synthetic templates (rv-br0)
448- 455 F8.2 km/s e_RVbr0 ?=-9999 Uncertainty of RVbr0 measured by
the method LASP used (rv-br0-err)
457- 464 F8.2 km/s RVbr1 ?=-9999 Radial velocity after zero-point
correction of RVbr0 (rv-br1)
466- 473 F8.2 km/s e_RVbr1 ?=-9999 Uncertainty of RVbr1 measured by
the error propagation (rv-br1-err)
475- 479 I5 --- fRVbr ?=-9999 Radial velocity flag for B and R
band spectra (rv-br-flag)
481- 488 F8.2 km/s RVlasp0 ?=-9999 Radial velocity measured by LASP
(rv-lasp0)
490- 497 F8.2 km/s e_RVlasp0 ?=-9999 Uncertainty of RVlasp0 also given
by the LASP used (rv-lasp0-err)
499- 506 F8.2 km/s RVlasp1 ?=-9999 Radial velocity after zero-point
correction of RVlasp0 (rv-lasp1)
508- 515 F8.2 km/s e_RVlasp1 ?=-9999 Uncertainty of RVlasp1 measured
by the error propagation (rv-lasp1-err)
517 I1 --- coadd [1] A flag to show whether it is a coadd
spectrum (0=No, 1=Yes) (coadd)
519- 523 I5 --- FiberMask ?=-9999 Possible fiber problems
(fibermask) (4)
525- 533 F9.3 [-] alphacnn ?=-9999 Alpha element abundance estimated
by the CNN method (alpha-m-cnn)
535- 543 F9.3 [-] Zcnn ?=-9999 Metallicity estimated by the CNN
method (m-h-cnn)
545- 552 F8.2 K Teffcnn ?=-9999 Effective temperature estimated
by the CNN method (teff-cnn)
554- 562 F9.3 [cm/s2] loggcnn ?=-9999 Surface gravity estimated by the
CNN method (logg-cnn)
564- 572 F9.3 [-] [Fe/H]cnn ?=-9999 Fe abundance estimated by the CNN
method (feh-cnn)
574- 585 F12.6 [-] [C/Fe] ?=-9999 Individual element abundance of
[C/Fe] estimated by the CNN method (c-fe)
587- 598 F12.6 [-] [N/Fe] ?=-9999 Individual element abundance of
[N/Fe] estimated by the CNN method (n-fe)
600- 611 F12.6 [-] [O/Fe] ?=-9999 Individual element abundance of
[O/Fe] estimated by the CNN method (o-fe)
613- 624 F12.6 [-] [Mg/Fe] ?=-9999 Individual element abundance of
[Mg/Fe] estimated by the CNN method
(mg-fe)
626- 637 F12.6 [-] [Al/Fe] ?=-9999 Individual element abundance of
[Al/Fe] estimated by the CNN method
(al-fe)
639- 650 F12.6 [-] [Si/Fe] ?=-9999 Individual element abundance of
[Si/Fe] estimated by the CNN method
(si-fe)
652- 663 F12.6 [-] [S/Fe] ?=-9999 Individual element abundance of
[S/Fe] estimated by the CNN method (s-fe)
665- 676 F12.6 [-] [Ca/Fe] ?=-9999 Individual element abundance of
[Ca/Fe] estimated by the CNN method
(ca-fe)
678- 689 F12.6 [-] [Ti/Fe] ?=-9999 Individual element abundance of
[Ti/Fe] estimated by the CNN method
(ti-fe)
691- 702 F12.6 [-] [Cr/Fe] ?=-9999 Individual element abundance of
[Cr/Fe] estimated by the CNN method
(cr-fe)
704- 715 F12.6 [-] [Ni/Fe] ?=-9999 Individual element abundance of
[Ni/Fe] estimated by the CNN method
(ni-fe)
717- 728 F12.6 [-] [Cu/Fe] ?=-9999 Individual element abundance of
[Cu/Fe] estimated by the CNN method
(cu-fe)
730- 741 F12.6 [-] alphalasp ?=-9999 Alpha element abundance estimated
by the LASP (alpha-m-lasp)
743- 754 F12.6 [-] e_alphalasp ?=-9999 alphalasp uncertainty
(alpha-m-lasp-err)
756- 760 F5.1 deg SepMoon [10.3/173.1] Angular distance of each
target to the moon (moon-angle)
762- 763 I2 --- DateMoon [7/24] The date of Chinese lunar
calendar, which represents the moon phase
(lunardate) (5)
765 I1 --- f_SepMoon [0/1] Flag on SepMoon (moon-flg) (6)
--------------------------------------------------------------------------------
Note (1): Band occurrences as follows:
B = 2476658 occurrences
R = 117412 occurrences
Note (2): Fiber type as follows:
Obj = the fiber is assigned to an object, including star, galaxy and
so on (2539901 occurrences)
Sky = the fiber is allocated to take skylight (0 occurrence)
F-std = the fiber is used to take the light of a flux calibration standard
star (54169 occurrences)
Unused = unused fiber (0 occurrence)
PosErr = wrong fiber position (0 occurrence)
Dead = out of commission (0 occurrence)
Note (3): The fiber-offset is usually applied for the very bright stars (r<11)
to avoid CCD saturation. Flag as follows:
0 = No offset (2593707 occurrences)
1 = Offset (363 occurrence)
Note (4): The value field shall contain an integer, which is used to show the
problems of fibers. If you want to know the exact problem of a fiber, you
should first convert the decimal value of "FiberMask" to a nine-bit binary
number with bits as follows: 9 8 7 6 5 4 3 2 1.
If the value of a bit is 1, it represents the fiber has associated problem.
The associated fiber problem of each bit is:
---------------------------------------------------------
1 | NOALLOTTED | Fiber not allotted
2 | BADTRACE | Bad trace from the routine TRACECENTER
3 | BADFLAT | Low counts in flat field
4 | BADARC | Bad arc solution
5 | MANYBADPIXEL | >10% pixels are bad on CCD
6 | SATURATED | >10% pixels are saturated
7 | WHOPPER | Whopping fiber
8 | NEARWHOPPER | Near a whopping fiber
9 | BADSKYFIBER | Sky fiber shows extreme residuals
----------------------------------------------------------
Note (5): Each month of the Chinese lunar calendar corresponds to a full cycle
of the Moon (which is 29.5 days) and is therefore either 29 or 30 days long.
The months start on a New Moon (Day 1) and end on one (Day 29∼30) so a Full
Moon falls in the middle of the month (Day 14∼15).
Note (6): Flag as follows:
1 = Angular distance is in the range 10 to 30° (183051 occurrences)
0 = Angular distance is larger than 30° (2411019 occurrences)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: dr11mem.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- uID Unique source identifier calculated with
the "uRA" and "uDE" in this table (uid)
17- 30 F14.10 deg uRA Right ascension used to calculate "uID", and
it may be from Gaia (I/355),
Pan-STARRS (II/349), or LAMOST (J2000)
(ura)
32- 44 F13.10 deg uDE Declination used to calculate "uID", and it
may be from Gaia (I/355),
Pan-STARRS (II/349), or LAMOST (J2000)
(udec)
46- 64 I19 --- gpID For each LAMOST source, the equatorial
coordinates ("uRA" and "uDE" in this
table) used to calculate "uID" were from
which survey (Pan-STARRS (II/349),
Gaia (I/355) or LAMOST), "gpID" gives the
corresponding source identifier in that
survey (gp-id)
66- 67 I2 --- Nobs [2/63] Observation plan numbers for each
target with multiple epoch observations
(obs-number)
69- 718 A650 --- ObsIDlist The "ObsID" list (obsid-list)
720- 1202 A483 --- Tefflist LASP effective temperature list
(teff-lasp-list)
1204- 1574 A371 --- logglist LASP surface gravity list
(logg-lasp-list)
1576- 2002 A427 --- [Fe/H]list LASP metallicity list (feh-lasp-list)
2004- 2006 I3 --- nExp [1/205] Total exposure number (exp-number)
2008- 3851 A1844 --- LMJMlist List of beginning times of each exposure
for this plate in local modified Julian
minute (truncated to 1000 characters)
(lmjm-list)
3853- 5613 A1761 --- RVb0list List of radial velocities of B band
spectra measured with 483 selected
KURUCZ synthetic templates (truncated to
1000 characters) (rv-b0-list)
5615- 7375 A1761 --- RVb1list List of radial velocities after
zero-point correction of RVb0 (truncated
to 1000 characters) (rv-b1-list)
7377- 9138 A1762 --- RVr0list List of radial velocities of R band
spectra measured with 483 selected
KURUCZ synthetic templates (truncated to
1000 characters) (rv-r0-list)
9140-10901 A1762 --- RVr1list List of radial velocities after zero-point
correction of RVr0 (truncated to
1000 characters) (rv-r1-list)
10903-12663 A1761 --- RVbr0list List of radial velocities of B and R band
spectra measured with 483 selected
KURUCZ synthetic templates (truncated to
1000 characters) (rv-br0-list)
12665-14425 A1761 --- RVbr1list List of radial velocities after zero-point
correction of RVbr0 (truncated to
1000 characters) (rv-br1-list)
14427-14462 A36 --- GaiaType Variability types obtained by
cross-matching with 11 Specific Object
Studies (SOS) tables of Gaia DR3 (I/355)
(gaia-vari-type-sos)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: dr11pm.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- pID [5889/11270] Plate ID (pid)
7- 16 A10 "Y:M:D" Obs.Date Target observation date (obsdate)
18- 37 A20 --- PlanID Plan name (planid)
39- 49 F11.7 deg RAdeg Right ascension of center star (J2000)
(ra)
51- 60 F10.7 deg DEdeg Declination of center star (J2000) (dec)
62- 66 F5.2 mag mag [0/99] Magnitude of center star (mag)
68- 71 F4.2 --- Seeing [2/8.1] Seeing of the first exposure
(seeing)
73- 176 A104 --- ExpTime List of total exposure times (in seconds)
(exptime)
178- 311 A134 --- LMJMlist List of beginning times of each exposure
for this plate in local modified Julian
minute (lmjm-list)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: dr11im.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 I10 --- ObsID [588901001/1127016250] Unique spectrum ID
(obsid)
12- 21 A10 "Y:M:D" Obs.Date Target observation date (obsdate)
23- 42 A20 --- PlanID Plan name (planid)
44- 45 I2 --- spID [1/16] Spectrograph ID (spid)
47- 49 I3 --- FiberID [1/250] Fiber ID (fiberid)
51- 55 A5 --- unitID ID of 4000 fiber units (unitid)
57- 70 F14.10 deg RAdeg Fiber pointing right ascension (J2000)
(ra-obs)
72- 85 F14.10 deg DEdeg Fiber pointing declination (J2000)
(dec-obs)
87- 96 A10 --- objType Object type (objtype) (5)
98- 107 A10 --- magType Target magnitude type (magtype) (6)
109- 113 F5.2 mag mag1 [0/99] Associated magnitude 1 (mag1)
115- 119 F5.2 mag mag2 [0/99] Associated magnitude 2 (mag2)
121- 125 F5.2 mag mag3 [0/99] Associated magnitude 3 (mag3)
127- 131 F5.2 mag mag4 [0/99] Associated magnitude 4 (mag4)
133- 137 F5.2 mag mag5 [0/99] Associated magnitude 5 (mag5)
139- 143 F5.2 mag mag6 [0/99] Associated magnitude 6 (mag6)
145- 149 F5.2 mag mag7 [0/99] Associated magnitude 7 (mag7)
151- 160 A10 --- tSource Preliminary classification label
for each target used by the "fiber
allocation procedure" (tsource) (1)
162- 167 A6 --- FiberType Fiber type of target (fibertype) (3)
169- 180 A12 --- tFrom Further classification label for each
target used by the "fiber allocation
procedure" (tfrom) (2)
182- 233 A52 --- tComment Comment about each target
(target ID and/or observed equatorial
coordinate bias) (tcomment)
235 I1 --- offsets [0/1] Whether there is a fiber offset
during observation (0=No, 1=Yes) (offsets)
(4)
237- 241 F5.3 arcsec offsetsv [0/3.65] If the "offsets" field is true,
"offsetsv" gives the offset distance from
the target's coordinator in input catalog
(offsets-v)
243- 256 F14.10 deg RAOdeg Right ascension from input catalog (ra)
258- 271 F14.10 deg DEOdeg Declination from input catalog (dec)
273- 279 A7 --- Epoch [J2000.0] Epoch (epoch)
281- 300 A20 --- TName Unique ID for each targets in this catalog
(tname)
--------------------------------------------------------------------------------
Note (1): It generally denotes the organization and researcher who submits the
target, the research subject to which the target belongs, and so on.
Note (2): it generally denotes the astronomical catalogues where the targets
were chosen from, the target selection algorithm, and so on.
Note (3): Fiber type as follows:
Obj = the fiber is assigned to an object, including star, galaxy and
so on (5160325 occurrences)
Sky = the fiber is allocated to take skylight (2157784 occurrences)
F-std = the fiber is used to take the light of a flux calibration standard
star (150710 occurrences)
Unused = unused fiber (1489012 occurrences)
PosErr = wrong fiber position (613419 occurrences)
Dead = out of commission (0 occurrence)
Note (4): The fiber-offset is usually applied for the very bright stars (r<11)
to avoid CCD saturation. Flag as follows:
0 = No offset (9570295 occurrences)
1 = Offset (955 occurrences)
Note (5): The object types come directly from the original catalog providers
and are not listed nor described in the LAMOST documentation.
Note (6): This field gives the bands corresponding to the following magnitudes.
For example, magType=ugriz means mag1=u, mag2=g, mag3=r, mag4=i, mag5=z, and
mag6/mag7=NULL.
--------------------------------------------------------------------------------
History:
From http://www.lamost.org/dr11/v2.0/catalogue
(End) Robin Leichtnam [CDS] 28-Jan-2026