J/ApJS/234/5 LaCoSSPAr in the Southern Galactic Cap. I. (Yang+, 2018)
The LAMOST Complete Spectroscopic Survey of Pointing Area (LaCoSSPAr) in the
Southern Galactic Cap.
I. The spectroscopic redshift catalog.
Yang M., Wu H., Yang F., Lam M.I., Cao T.-W., Wu C.-J., Zhao P.-S.,
Zhang T.-M., Zhou Z.-M., Wu X.-B., Zhang Y.-X., Shao Z.-Y., Jing Y.-P.,
Shen S.-Y., Zhu Y.-N., Du W., Lei F.-J., He M., Jin J.-J., Shi J.-R.,
Zhang W., Wang J.-L., Wu Y.-Z., Zhang H.-T., Luo A.-L., Yuan H.-L.,
Bai Z.-R., Kong X., Gu Q.-S., Zhou X., Ma J., Hu Z., Nie J.-D., Wang J.-L.,
Zhang Y., Hou Y.-H., Zhao Y.-H.
<Astrophys. J. Suppl. Ser., 234, 5 (2018)>
=2018ApJS..234....5Y 2018ApJS..234....5Y
ADC_Keywords: Galaxy catalogs ; Redshifts ; Spectroscopy ; Surveys ;
Photometry, SDSS ; Photometry, ultraviolet ; Photometry, infrared
Keywords: catalogs; galaxies: distances and redshifts; galaxies: general;
galaxies: statistics; surveys
Abstract:
We present a spectroscopic redshift catalog from the LAMOST Complete
Spectroscopic Survey of Pointing Area (LaCoSSPAr) in the Southern
Galactic Cap (SGC), which is designed to observe all sources (Galactic
and extragalactic) by using repeating observations with a limiting
magnitude of r=18.1mag in two 20deg2 fields. The project is mainly
focusing on the completeness of LAMOST ExtraGAlactic Surveys (LEGAS)
in the SGC, the deficiencies of source selection methods, and the
basic performance parameters of the LAMOST telescope. In both fields,
more than 95% of galaxies have been observed. A post-processing has
been applied to the LAMOST 1D spectrum to remove the majority of
remaining sky background residuals. More than 10000 spectra have been
visually inspected to measure the redshift by using combinations of
different emission/absorption features with an uncertainty of
σz/(1+z)<0.001. In total, 1528 redshifts (623 absorption and
905 emission line galaxies) in Field A and 1570 redshifts (569
absorption and 1001 emission line galaxies) in Field B have been
measured. The results show that it is possible to derive redshift from
low S/N galaxies with our post-processing and visual inspection. Our
analysis also indicates that up to one-fourth of the input targets for
a typical extragalactic spectroscopic survey might be unreliable. The
multi-wavelength data analysis shows that the majority of
mid-infrared-detected absorption (91.3%) and emission line galaxies
(93.3%) can be well separated by an empirical criterion of W2-W3=2.4.
Meanwhile, a fainter sequence paralleled to the main population of
galaxies has been witnessed both in Mr/W2-W3 and M*/W2-W3 diagrams,
which could be the population of luminous dwarf galaxies but
contaminated by the edge-on/highly inclined galaxies (∼30%).
Description:
We have selected two FOVs according to the distribution of galaxy
clusters from the Abell rich galaxy clusters catalog (Abell+ 1989,
VII/110) in the region of the South Galactic Cap u-band Sky Survey
(SCUSS, Zhou+ 2016RAA....16....7Z 2016RAA....16....7Z).
The central coordinates of the two FOVs we selected are
RA=37.88°,DE=3.44° (Field A) and RA=21.53,DE=-2.20°
(Field B) as shown in Figure 1.
The observation of LAMOST is automatically managed by the Survey
Strategy System (SSS). We conduct the observation from 2012 September
to 2014 January (except July through August, which is the maintain
period of the telescope). Field A contains 2519 galaxies and 13930
stars in which 2447 (∼97%) and 13278 (∼95%) of them have been observed
with 5 B and 12 F plates (redundant F plates are caused by a technical
issue), respectively. Field B contains 3104 galaxies and 11381 stars
in which 2995 (∼97%) and 10224 (∼90%) of them have been observed with
six B and five F plates, respectively.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 389 1528 The spectroscopic redshift catalog of LAMOST
Complete Spectroscopic Survey of Pointing Area
(LaCoSSPAr) -- Field A
table3.dat 393 1570 The spectroscopic redshift catalog of LaCoSSPAr
-- Field B
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See also:
VII/110 : Rich Clusters of Galaxies (Abell+ 1989)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman- McCarthy+, 2012)
II/328 : AllWISE Data Release (Cutri+ 2013)
V/147 : The SDSS Photometric Catalog, Release 12 (Alam+, 2015)
V/146 : LAMOST DR1 catalogs (Luo+, 2015)
V/149 : LAMOST DR2 catalogs (Luo+, 2016)
J/ApJ/384/404 : Redshifts of nearby rich clusters of gal. (Postman+ 1992)
J/PASP/111/438 : Updated Zwicky catalog (UZC) (Falco+, 1999)
J/ApJS/167/1 : Galaxy groups and clusters from SDSS (Berlind+, 2006)
J/MNRAS/406/1583 : Quasar from SDSS and UKIDSS (Wu+, 2010)
J/AJ/144/49 : QSOs from SDSS-DR7, WISE and UKIDSS surveys (Wu+, 2012)
J/other/RAA/15.1424 : LAMOST luminous infrared galaxies (Lam+, 2015)
J/other/RAA/15.1414 : E+A galaxy candidates in LAMOST DR2 (Yang+, 2015)
J/other/RAA/16.C7 : LAMOST-SDSS galaxy pairs (Shen+, 2016)
J/AJ/151/24 : LAMOST quasar survey: QSOs from the DR1 (Ai+, 2016)
J/other/RAA/17.41 : LAMOST metal-poor galaxies sample (Gao+, 2017)
Byte-by-byte Description of file: table[23].dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq Running sequence number
6- 14 F9.6 deg RAdeg Right Ascension (J2000)
16- 24 F9.6 deg DEdeg Declination (J2000)
26- 26 A1 --- Type [ae] Galaxy type (1)
28- 33 F6.4 --- zspec [0.006/3.2] Spectroscopic redshift
35- 42 F8.3 mag FUVmag [16.5/24.4]?=-999 GALEX FUV magnitude (2)
44- 51 F8.3 mag e_FUVmag [0.006/0.8]?=-999 GALEX FUV magnitude error (2)
53- 60 F8.3 mag NUVmag [16/24.7]?=-999 GALEX NUV magnitude (2)
62- 69 F8.3 mag e_NUVmag [0.003/1.2]?=-999 GALEX NUV magnitude error (2)
71- 78 F8.3 mag umag [14.6/34]?=-999 SDSS u-band Petrosian
magnitude (2)
80- 87 F8.3 mag e_umag [0.005/66]?=-999 umag error (2)
89- 96 F8.3 mag gmag [14/34]?=-999 SDSS g-band Petrosian
magnitude (2)
98-105 F8.3 mag e_gmag [0.002/144]?=-999 gmag error (2)
107-114 F8.3 mag rmag [14/20.5]?=-999 SDSS r-band Petrosian
magnitude (2)
116-123 F8.3 mag e_rmag [0.002/7.6]?=-999 rmag error (2)
125-132 F8.3 mag imag [13.6/35]?=-999 SDSS i-band Petrosian
magnitude (2)
134-141 F8.3 mag e_imag [0.002/1557]?=-999 imag error (2)
143-150 F8.3 mag zmag [13.3/31.1]?=-999 SDSS z-band Petrosian
magnitude (2)
152-159 F8.3 mag e_zmag [0.004/518]?=-999 zmag error (2)
161-168 F8.3 mag Jmag [13.2/17.4]?=-999 2MASS J-band magnitude (2)
170-177 F8.3 mag e_Jmag [0.02/0.3]?=-999 Jmag error (2)
179-186 F8.3 mag Hmag [12.5/16.8]?=-999 2MASS H-band magnitude (2)
188-195 F8.3 mag e_Hmag [0.02/0.3]?=-999 Hmag error (2)
197-204 F8.3 mag Ksmag [12/16]?=-999 2MASS Ks-band magnitude (2)
206-213 F8.3 mag e_Ksmag [0.03/0.3]?=-999 Ksmag error (2)
215-222 F8.3 mag W1mag [10.8/17.8]?=-999 ALLWISE W1 band magnitude (2)
224-231 F8.3 mag e_W1mag [0.02/0.2]?=-999 W1mag error (2)
233-240 F8.3 --- W1snr [5.8/50]?=-999 ALLWISE W1-band
Signal-to-Noise Ratio (2)
242-249 F8.3 mag W2mag [9.9/17.1]?=-999 ALLWISE W2 band magnitude (2)
251-258 F8.3 mag e_W2mag [0.02/0.4]?=-999 W2mag error (2)
260-267 F8.3 --- W2snr [1/55]?=-999 ALLWISE W2-band
Signal-to-Noise Ratio (2)
269-276 F8.3 mag W3mag [6.6/13]?=-999 ALLWISE W3 band magnitude (2)
278-285 F8.3 mag e_W3mag [0.01/0.6]?=-999 W3mag error (2)
287-294 F8.3 --- W3snr [-2.5/68.4]?=-999 ALLWISE W3-band
Signal-to-Noise Ratio (2)
296-303 F8.3 mag W4mag [3.7/9.6]?=-999 ALLWISE W4 band magnitude (2)
305-312 F8.3 mag e_W4mag [0.02/0.6]?=-999 W4mag error (2)
314-321 F8.3 --- W4snr [-3/47]?=-999 ALLWISE W4-band
Signal-to-Noise Ratio (2)
323-330 F8.3 mag FUVmag0 [10.5/24.4]?=-999 GALEX FUV,
rest frame magnitude (2)
332-339 F8.3 mag NUVmag0 [15.8/24]?=-999 GALEX NUV,
rest frame magnitude (2)
341-348 F8.3 mag umag0 [14.7/35]?=-999 SDSS u-band,
rest frame magnitude (2)
350-357 F8.3 mag gmag0 [14.3/34]?=-999 SDSS g-band,
rest frame magnitude (2)
359-366 F8.3 mag rmag0 [13.8/20.3]?=-999 SDSS r-band,
rest frame magnitude (2)
368-375 F8.3 mag imag0 [13.5/35]?=-999 SDSS i-band,
rest frame magnitude (2)
377-384 F8.3 mag zmag0 [13.2/31.1]?=-999 SDSS z-band,
rest frame magnitude (2)
386-393 A8 --- Comm Comments for peculiar targets (3)
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Note (1): Galaxy type as follows:
a = absorption line galaxy (623 occurrences);
e = emission line galaxy (905 occurrences).
Note (2): Targets without detection, or the errors of the upper limits (SNR<3;
only for the ALLWISE data) in each passband are assigned a null of -999.0.
Note (3): Candidates of peculiar targets (115 sources). A "?" indicates that the
identification is tentative. Class as follows:
BL = broadline;
HII = HII region;
LN = LINER;
OL = overlapped galaxies/star-galaxy;
QSO = quasar;
Sy1 = Seyfert1;
Sy2 = Seyfert2;
VFD = very faint dwarf galaxies.
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History:
From electronic version of the journal
References:
Lam et al. 2015RAA....15.1424L 2015RAA....15.1424L Cat. J/other/RAA/15.1424
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 12-Mar-2018