J/other/RAA/15.1182 M Dwarf catalog of LAMOST DR1 (Guo+, 2015)
M Dwarf catalog of LAMOST general survey data release one.
Guo Y.-X., Yi Z.-P., Luo A.-L., Wang Y.-F., Bai Y., Yang H.-F., Song Y.-H.,
Chen J.-J., Chen X.-Y., Zuo F., Du B., Zhang J.-N., Li Y.-B., Kong X.,
Wang M.-X., Wu Y., Wu K.-F., Zhao Y.-H., Zhang Y., Hou Y.-H., Wang Y.-F.,
Yang M.
<Res. Astron. Astrophys., 15, 1182 (2015)>
=2015RAA....15.1182G 2015RAA....15.1182G (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Stars, dwarfs ; Stars, M-type ; Stars, peculiar
Keywords: catalogs - methods: analytical - stars: statistical -
stars: late-type - stars: magnetic-activity - stars
Abstract:
We present a spectroscopic catalog of 93 619 M dwarfs from the first
data release of the Large Sky Area Multi-Object Fiber Spectroscopic
Telescope (LAMOST) general survey. During sample selection, M giant
contamination was eliminated using 2MASS photometry and CaH/TiO
molecular indices. For each spectrum, the spectral subtype and values
are provided including radial velocity, Hα equivalent width, a
series of prominent molecular band indices, and the metal-sensitive
parameter ζ, as well as distances and the space motions for high
S/N objects. In addition, Hα emission lines are measured to
examine the magnetic activity properties of M dwarfs and 7179 active
ones are found. In particular, a subsample with significant variation
in magnetic activity is revealed through observations from different
epochs. Finally, statistical analysis for this sample is performed,
including the metallicity classification, the distribution of
molecular band indices and their errors.
Description:
We present a spectroscopic M dwarf catalog from LAMOST DR1, which
consists of 110321 M dwarf spectra of 93619 objects. Our catalog not
only includes the spectral subtypes, RVs, EWs of Hα, magnetic
activity, nine molecular band indices and their errors, and
metal-sensitive parameter ζ, but also provides 2MASS photometric
information. Their distances and space motions (U, V, W) are
also available for high S/N objects.
Using a sample of more than 120000 candidates from the LAMOST
spectroscopic database, we combine the 2MASS infrared photometry and
CaH/TiO5 ratio to eliminate possible M giant contamination. By
examining the distributions of S/N, magnitude and spectral subtype, as
well as RV, we gain an overall understanding of M dwarfs in LAMOST
DR1.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
dr1mcat.dat 640 110321 Spectroscopic M dwarf catalog from LAMOST DR1
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See also:
V/146 : LAMOST DR1 catalogs (Luo+, 2015)
Byte-by-byte Description of file: dr1mcat.dat
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Bytes Format Units Label Explanations
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1- 9 I9 --- ObsID Obs ID
11- 20 A10 "date" Obs.Date Observation date
22- 26 I5 d LMJD Local Modified Julian Day
28- 47 A20 --- PlanId Plan Name
49- 50 I2 --- spId Spectrograph ID
52- 54 I3 --- FiberID Fiber ID
56- 69 F14.10 deg RAdeg Right Ascension (J2000)
71- 83 F13.10 deg DEdeg Declination (J2000)
85- 89 F5.2 --- snru ? Signal Noise Ratio of u filter
91- 98 F8.2 --- snrg ? Signal Noise Ratio of g filter
100-107 F8.2 --- snrr ? Signal Noise Ratio of r filter
109-116 F8.2 --- snri ? Signal Noise Ratio of i filter
118-125 F8.2 --- snrz ? Signal Noise Ratio of z filter
127-136 A10 --- objType Object Type
138-142 A5 --- FiberType Fiber Type of target
(Obj, Sky, F-std, Unused, PosErr, Dead)
144-162 A19 --- Name Designation (JHHMMSS.ss+DDMMSS.s)
164-173 A10 --- magType Target Magnitude Type
175-179 F5.2 mag mag1 ?=99 Associated Magnitude 1
181-185 F5.2 mag mag2 ?=99 Associated Magnitude 2
187-191 F5.2 mag mag3 ?=99 Associated Magnitude 3
193-197 F5.2 mag mag4 ?=99 Associated Magnitude 4
199-203 F5.2 mag mag5 ?=99 Associated Magnitude 5
205-209 F5.2 mag mag6 ?=99 Associated Magnitude 6
211-215 F5.2 mag mag7 ?=99 Associated Magnitude 7
217-226 A10 --- tsource Organization or person who submits
input catalog
228-245 A18 --- tfrom Input catalog submitted by an organization or
a person determined by the tsource
247-269 A23 --- tInfo Target ID from SDSS, UCAC4, PANSTAR and
other catalogue
271-282 F12.6 km/s RV ? Heliocentric Radial Velocity
284-295 F12.6 km/s e_RV ? Uncertainty of Heliocentric Radial Velocity
297-308 F12.6 0.1nm EWHa Hα equivalent width
310-322 F13.6 0.1nm e_EWHa ?=-9999 rms uncertainty on EWHA
324-335 F12.6 --- S/N ?=-9999 Halpha signal-to-noise ratio (sn)
337-348 F12.6 --- S/N1 ?=-9999 Second signal-to-noise ratio (sn1)
350-361 F12.6 --- Zeta ?=-9999 Metal-sensitive parameter
363-374 F12.6 --- e_Zeta ?=-9999 rms uncertainty on Zeta
376-387 F12.6 --- MA [0/1]?=-9999 Magnetic activity, 1 for yes
389-400 F12.6 --- CaH1 ?=-9999 CaH1 index
402-413 F12.6 --- CaH2 ?=-9999 CaH2 index
415-426 F12.6 --- CaH3 ?=-9999 CaH3 index
428-439 F12.6 --- TiO1 ?=-9999 TiO1 index
441-452 F12.6 --- TiO2 ?=-9999 TiO2 index
454-465 F12.6 --- TiO3 ?=-9999 TiO3 index
467-478 F12.6 --- TiO4 ?=-9999 TiO4 index
480-491 F12.6 --- TiO5 ?=-9999 TiO5 index
493-504 F12.6 --- e_CaH1 ?=-9999 rms uncertainty on CaH1
506-517 F12.6 ---- e_CaH2 ?=-9999 rms uncertainty on CaH2
519-530 F12.6 --- e_CaH3 ?=-9999 rms uncertainty on CaH3
532-544 F13.6 --- e_TiO1 ?=-9999 rms uncertainty on TiO1
546-557 F12.6 --- e_TiO2 ?=-9999 rms uncertainty on TiO2
559-571 F13.6 --- e_TiO3 ?=-9999 rms uncertainty on TiO3
573-584 F12.6 --- e_TiO4 ?=-9999 rms uncertainty on TiO4
586-597 F12.6 --- e_TiO5 ?=-9999 rms uncertainty on TiO5
599-607 F9.4 km/s Uvel ?=- U velocity
611-619 F9.4 km/s Vvel ?=- V velocity
623-631 F9.4 km/s Wvel ?=- W velocity
633-640 F8.4 pc Dist ?=- Distance
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History:
Copied at http://paperdata.china-vo.org/Guoyx/2015/DR1_M_catalog.txt
(End) Patricia Vannier [CDS] 19-Jan-2016