J/ApJS/180/54 Globular cluster candidates in ACS Virgo survey. (Jordan+, 2009)
The ACS Virgo cluster survey. XVI.
Selection procedure and catalogs of globular cluster candidates.
Jordan A., Peng E.W., Blakeslee J.P., Cote P., Eyheramendy S.,
Ferrarese L., Mei S., Tonry J.L., West M.J.
<Astrophys. J. Suppl. Ser., 180, 54-66 (2009)>
=2009ApJS..180...54J 2009ApJS..180...54J
ADC_Keywords: Clusters, galaxy ; Photometry, HST ; Clusters, globular
Keywords: catalogs - galaxies: elliptical and lenticular, cD
galaxies: star clusters - globular clusters: general
methods: statistical
Abstract:
We present catalogs of globular cluster candidates for the 100
galaxies of the Advanced Camera for Surveys Virgo Cluster Survey, a
large program to carry out imaging of early-type members of the Virgo
Cluster using the Advanced Camera for Surveys (ACS) on the Hubble
Space Telescope. We describe the procedure used to select bona fide
globular cluster candidates out of the full list of detections based
on model-based clustering methods with the use of expected
contamination catalogs constructed using blank field observations and
which are customized for each galaxy. We also present the catalogs of
expected contaminants for each of our target galaxies. For each
detected source we measure its position, magnitudes in the F475W
(∼Sloan g) and F850LP (∼Sloan z) bandpasses, and half-light radii by
fitting point-spread function convolved King models to the observed
light distribution. These measurements are presented for 20375
sources, of which 12763 are likely to be globular clusters. Finally,
we detail the calculation of the aperture corrections adopted for the
globular cluster photometry.
Description:
The ACS Virgo Cluster Survey is a large program to image 100
early-type galaxies in the Virgo Cluster with the Hubble Space
Telescope (HST) Advanced Camera for Surveys (ACS).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 62 2400 g-band completeness curves
table3.dat 62 2400 z-band completeness curves
table4.dat 142 12763 Photometric and structural catalog of sources
table5.dat 59 112255 Catalog of expected contaminants
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See also:
J/AJ/90/1681 : The Virgo Cluster Catalog (VCC) (Binggeli+, 1985)
J/ApJS/153/223 : ACS Virgo Cluster Survey. I (Cote+, 2004)
J/ApJS/154/509 : ACS Virgo Cluster Survey. II (Jordan+, 2004)
J/ApJ/613/279 : ACS Virgo Cluster Survey. III M87 (Jordan+, 2004)
J/ApJS/164/334 : ACS Virgo Cluster Survey. VI (Ferrarese+, 2006)
J/ApJS/171/101 : ACS Virgo Cluster Survey. XII (Jordan+, 2007)
J/ApJ/655/144 : ACS Virgo Cluster Survey. XIII (Mei+, 2007)
J/ApJ/681/197 : ACS Virgo Cluster Survey. XV (Peng+, 2008)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 F6.4 arcsec rh Half-light radius
8- 12 F5.2 mag gmag HST/ACS F475W band AB magnitude
14- 17 F4.2 --- 0.0518 Completeness at background level 0.0518
19- 22 F4.2 --- 0.1046 Completeness at background level 0.1046
24- 27 F4.2 --- 0.1491 Completeness at background level 0.1491
29- 32 F4.2 --- 0.2359 Completeness at background level 0.2359
34- 37 F4.2 --- 0.4023 Completeness at background level 0.4023
39- 42 F4.2 --- 0.7175 Completeness at background level 0.7175
44- 47 F4.2 --- 1.2535 Completeness at background level 1.2535
49- 52 F4.2 --- 2.1876 Completeness at background level 2.1876
54- 57 F4.2 --- 3.6955 Completeness at background level 3.6955
59- 62 F4.2 --- 6.0713 Completeness at background level 6.0713
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 6 F6.4 arcsec rh Half-light radius
8- 12 F5.2 mag zmag HST/ACS F850LP band AB magnitude
14- 17 F4.2 --- 0.0326 Completeness at background level 0.0326
19- 22 F4.2 --- 0.0917 Completeness at background level 0.0917
24- 27 F4.2 --- 0.1403 Completeness at background level 0.1403
29- 32 F4.2 --- 0.2354 Completeness at background level 0.2354
34- 37 F4.2 --- 0.4044 Completeness at background level 0.4044
39- 42 F4.2 --- 0.7457 Completeness at background level 0.7457
44- 47 F4.2 --- 1.3262 Completeness at background level 1.3262
49- 52 F4.2 --- 2.2897 Completeness at background level 2.2897
54- 57 F4.2 --- 4.3344 Completeness at background level 4.3344
59- 62 F4.2 --- 7.6519 Completeness at background level 7.6519
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- VCC Virgo Cluster Catalog number (1)
6- 16 F11.7 deg RAdeg Right Ascension in decimal degrees (J2000) (2)
18- 27 F10.7 deg DEdeg Declination in decimal degrees (J2000) (2)
29- 35 F7.3 arcsec GDist Galactocentric distance
37- 42 F6.3 mag zmag Model HST/ACS F850LP band magnitude (3)
44- 48 F5.3 mag e_zmag Uncertainty in zmag
50- 55 F6.3 mag zamag Average HST/ACS F850LP band correction aperture
magnitude (4)
57- 61 F5.3 mag e_zamag Uncertainty in zamag
63- 68 F6.3 mag gmag Model HST/ACS F475W band magnitude (3)
70- 74 F5.3 mag e_gmag Uncertainty in gmag
76- 81 F6.3 mag gamag Average HST/ACS F475W band correction aperture
magnitude (4)
83- 87 F5.3 mag e_gamag Uncertainty in gamag
89- 94 F6.4 arcsec rhz Best-fit HST/ACS F850LP band half-light radius
96-101 F6.4 arcsec e_rhz Uncertainty in rhz
103-108 F6.4 arcsec rhg Best-fit HST/ACS F475W band half-light radius
110-115 F6.4 arcsec e_rhg Uncertainty in rhg
117-120 F4.2 --- pGC Probability source is a Globular Cluster (5)
122-126 F5.3 mag E(B-V) Foreground E(B-V) assumed (6)
128-134 F7.4 ct/s bz Background HST/ACS F475W band counts
136-142 F7.4 ct/s bg Background HST/ACS F850LP band counts
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Note (1): Galaxy ID in the Virgo Cluster Catalogue (Binggeli et al.,
1985, Cat. J/AJ/90/1681, in Simbad).
This table present the structural and photometrical catalog of
all ACSVCS sources that satisfy the selection criteria presented in
Section 2.6 in Jordan et al., 2004, Cat. J/ApJS/154/509 (Paper II).
To select a sample of bona-fide GCs the sources should be restricted
to those having pGC≥0.5.
Note (2): Sources identified as <[JPB2009] DDD.ddddddd+DD.ddddddd> in Simbad.
Note (3): Obtained from the best-fits PSF convolved King model and an aperture
correction as per equation 9 (Section 3.1).
Note (4): Inferred from a 0.2" aperture and an aperture correction as per
equation 10 (Section 3.2).
Note (5): According to the maximum-likelihood estimate of our asumed mixture
model (see Section 7).
Note (6): E(B-V) taken from the DIRBE maps of Schlegel et al.,
(1998ApJ...500..525S 1998ApJ...500..525S). The corrections for foreground reddening were
taken to be Ag=3.634E(B-V) and Az=1.485E(B-V) in the g- and
z-bands respectively (see Jordan et al., 2004, Cat. J/ApJS/154/509).
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- VCC Virgo Cluster Catalog number (1)
6- 12 F7.3 arcsec GDist Galactocentric distance
14- 19 F6.3 mag zmag Model HST/ACS F850LP band magnitude (2)
21- 26 F6.3 mag zamag Average HST/ACS F475W band correction aperture
magnitude (3)
28- 33 F6.3 mag gmag Model HST/ACS F850LP band magnitude (2)
35- 40 F6.3 mag gamag Average HST/ACS F850LP band correction aperture
magnitude (3)
42- 47 F6.4 arcsec rhz Best-fit HST/ACS F850LP band half-light radius
49- 54 F6.4 arcsec rhg Best-fit HST/ACS F475W band half-light radius
56- 59 F4.2 --- pGC Probability source is a Globular Cluster (4)
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Note (1): This table presents the expected contaminants in 17 control fields
customized to each galaxy. It can be used to infer 17 times the
expected contamination in any given GC sample.
Note (2): Obtained from the best-fits PSF convolved King model and an aperture
correction as per equation 9.
Note (3): Inferred from a 0.2" aperture and an aperture correction as per
equation 10.
Note (4): According to the maximum-likelihood estimate of our asumed mixture
model (see Section 7).
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History:
From electronic version of the journal
References:
Cote et al., Paper I 2004ApJS..153..223C 2004ApJS..153..223C, Cat. J/ApJS/153/223
Jordan et al. , Paper II 2004ApJS..154..509J 2004ApJS..154..509J, Cat. J/ApJS/154/509
Jordan et al., Paper III 2004ApJ...613..279J 2004ApJ...613..279J, Cat. J/ApJ/613/279
Mei et al., Paper IV 2005ApJS..156..113M 2005ApJS..156..113M
Mei et al., Paper V 2005ApJ...625..121M 2005ApJ...625..121M
Ferrarese et al., Paper VI 2006ApJS..164..334F 2006ApJS..164..334F, Cat. J/ApJS/164/334
Hasegan et al., Paper VII 2005ApJ...627..203H 2005ApJ...627..203H
Cote et al., Paper VIII 2006ApJS..165...57C 2006ApJS..165...57C
Peng et al., Paper IX 2006ApJ...639...95P 2006ApJ...639...95P
Jordan et al., Paper X 2005ApJ...634.1002J 2005ApJ...634.1002J
Peng et al., Paper XI 2006ApJ...639..838P 2006ApJ...639..838P
Jordan et al., Paper XII 2007ApJS..171..101J 2007ApJS..171..101J, Cat. J/ApJS/171/101
Mei et al., Paper XIII 2007ApJ...655..144M 2007ApJ...655..144M, Cat. J/ApJ/655/144
Mieske et al., Paper XIV 2006ApJ...653..193M 2006ApJ...653..193M
Peng et al., Paper XV 2008ApJ...681..197P 2008ApJ...681..197P, Cat. J/ApJ/681/197
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-Oct-2009