ADC/CDS Standard Document for Catalog:/journal_tables/ApJS/137/117/
ADC/CDS Standard Document for Catalog:| 1. Use the ADC Data Viewer Suite to visualize the data. |
|
| 2. Get the data files via anonymous FTP. (See Note.) |
|
J/ApJS/137/117 Las Campanas Distant Cluster Survey (LCDCS) (Gonzales+, 2001)
================================================================================
The Las Campanas Distant Cluster Survey: the catalog.
Gonzalez A.H., Zaritsky D., Dalcanton J.J., Nelson A.
<Astrophys. J. Suppl. Ser. 137, 117 (2001)>
=2001ApJS..137..117G
================================================================================
ADC_Keywords: Clusters, galaxy ; Redshifts ; Extinction
Keywords: catalogs - galaxies: clusters: general -
galaxies: fundamental parameters - galaxies: high-redshift - surveys
Abstract:
We present an optically selected catalog of 1073 galaxy cluster and
group candidates at 0.3<~z<~1. These candidates are drawn from the Las
Campanas Distant Clusters Survey (LCDCS), a drift-scan imaging survey
of a 130 square degree strip of the southern sky. The survey data were
obtained in 1995 March under photometric conditions using the Las
Campanas 1 m telescope, the Great Circle Camera, and the Tek No. 5
CCD. To construct this catalog we utilize a novel detection process in
which clusters are detected as positive surface brightness
fluctuations in the background sky. This approach permits us to find
clusters with significantly shallower data than other matched-filter
methods that are based upon number counts of resolved galaxies.
Selection criteria for the survey are fully automated so that this
sample constitutes a well-defined, homogeneous sample that can be used
to address issues of cluster evolution and cosmology. Estimated
redshifts are derived for the entire sample, and an observed
correlation between surface brightness and velocity dispersion,
{sigma}, is used to estimate the limiting velocity dispersion of the
survey as a function of redshift.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 111 1073 Statistical Catalog
table2.dat 72 112 Supplemental Catalog
--------------------------------------------------------------------------------
See also:
VII/203 : Las Campanas Redshift Survey (Shectman+ 1996)
J/ApJS/130/237 : LCRS loose groups of galaxies (Tucker+, 2000)
J/other/AN/321.101 : Compact groups of galaxies in LCRS (Allam+, 2000)
J/MNRAS/327/588 : Las Campanas/AAT Rich Cluster Survey - I (Pimbblet+, 2001)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- LCDCS Candidate identification number (NNNN)
6- 7 I2 h RAh Right Ascension (J2000)
9- 10 I2 min RAm Right Ascension (J2000)
12- 15 F4.1 s RAs Right Ascension (J2000)
17 A1 --- DE- Sign of the Declination (J2000)
18- 19 I2 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 25 I2 arcsec DEs Declination (J2000)
27 A1 --- l_z Limit flag on z
28- 31 F4.2 --- z Estimated redshift
33- 37 F5.2 10-3ct/s/arcsec2 OSB Observed surface brightness
39- 43 F5.2 10-3ct/s/arcsec2 CSB Extinction corrected surface brightness
45- 49 F5.3 mag E(B-V) The (B-V) extinction
51-111 A61 --- n_LCDCS Additional information (1)
--------------------------------------------------------------------------------
Note (1): Additional information for some candidates, including notes for
objects that from inspection are obviously not clusters.
LSB = identified as a low surface brightness galaxy
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- LCDCS Candidate identification number (SNNN)
6- 7 I2 h RAh Right Ascension (J2000)
9- 10 I2 min RAm Right Ascension (J2000)
12- 15 F4.1 s RAs Right Ascension (J2000)
17 A1 --- DE- Sign of the Declination (J2000)
18- 19 I2 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 25 I2 arcsec DEs Declination (J2000)
27 A1 --- l_z Limit flag on z
28- 31 F4.2 --- z Estimated redshift
33- 37 F5.2 10-3ct/s/arcsec2 OSB Observed surface brightness
39- 43 F5.2 10-3ct/s/arcsec2 CSB Extinction corrected surface brightness
45- 49 F5.3 mag E(B-V) The (B-V) extinction
51- 57 A7 --- FCrit Failed Criteria (1)
59- 71 A13 --- n_LCDCS Additional information
--------------------------------------------------------------------------------
Note (1): Automated criteria that the detection failed to satisfy:
E = extinction E(B-V)>=0.10
z = z<0.30
LSB = identified as a low surface brightness galaxy
S = flagged as likely spurious
M = partially masked
G = identified as a galaxy because m_T_<18.75
--------------------------------------------------------------------------------
History:
From electronic version of the journal
================================================================================
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 02-Jan-2002