2004MNRAS.348..551G

Query : 2004MNRAS.348..551G

2004MNRAS.348..551G - Mon. Not. R. Astron. Soc., 348, 551-580 (2004/February-3)

Exploring the selection of galaxy clusters and groups: an optical survey for X-ray dark clusters.

GILBANK D.G., BOWER R.G., CASTANDER F.J. and ZIEGLER B.L.

Abstract (from CDS):

Data from a new, wide-field, coincident optical and X-ray survey, the X-ray Dark Cluster Survey (XDCS), are presented. This survey comprises simultaneous and independent searches for clusters of galaxies in the optical and X-ray passbands. Optical cluster detection algorithms implemented on the data are detailed. Two distinct optically selected catalogues are constructed, one based on I -band overdensity, the other on overdensities of colour-selected galaxies. The superior accuracy of the colour-selection technique over that of the single-passband method is demonstrated, via internal consistency checks and comparison with external spectroscopic redshift information. This is compared with an X-ray-selected cluster catalogue. In terms of gross numbers, the survey yields 185 I -band-selected, 290 colour-selected and 15 X-ray-selected systems, residing in ∼11 deg2 of optical + X-ray imaging.
The relationship between optical richness/luminosity and X-ray luminosity is examined, by measuring X-ray luminosities at the positions of our 290 colour-selected systems. Power-law correlations between the optical richness/luminosity and X-ray luminosity are fitted, both exhibiting approximately 0.2 dex of intrinsic scatter. Interesting outliers in these correlations are discussed in greater detail. Spectroscopic follow-up of a subsample of X-ray underluminous systems confirms their reality.

Abstract Copyright: 2004 RAS

Journal keyword(s): surveys - galaxies: clusters: general - cosmology: miscellaneous - X-rays: galaxies: clusters

Nomenclature: Tables 3, 4, 6: XDCS cmJHHMMSS.s+DDMMSS N=10+4+6, XDCS mfJHHMMSS.s+DDMMSS N=12.

Simbad objects: 47

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Number of rows : 47
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Mrk 1501 Bla 00 10 31.00590413 +10 58 29.5042981   15.96 15.40 12.22   ~ 763 1
2 BAX 021.1462+04.0136 ClG 01 24 35.1 +04 00 49           ~ 10 0
3 G 3-14 PM* 01 43 20.1790598651 +04 19 17.959793419 13.64 12.45 10.915 9.879 8.614 M2V 177 0
4 ClG J0329+0256 GrG 03 29 02.8 +02 56 23           ~ 14 0
5 PMN J0416+0105 BLL 04 16 52.4945693352 +01 05 23.899102620   16.86 16.38 16   ~ 302 1
6 8C 0716+714 BLL 07 21 53.4482942664 +71 20 36.363846516   15.5 15.50 14.27   ~ 1388 1
7 XDCS cmJ072345.2+712742 ClG 07 23 45.2 +71 27 42           ~ 1 0
8 GD 90 WD* 08 19 46.3656877152 +37 31 27.935699988   15.96 15.6     DAP 76 0
9 ACO 708 ClG 08 49 11.4 +37 31 23           ~ 28 0
10 NVSS J090530+340756 rG 09 05 30.101 +34 07 56.90   24.0 23.800 23.500   ~ 163 1
11 3C 216.0 Bla 09 09 33.49714902 +42 53 46.4821036   19.98 19.42 18.220   ~ 520 1
12 MCXC J0910.6+4248 ClG 09 10 39.7 +42 48 41           ~ 10 0
13 6C 091739+622838 Bla 09 21 36.23107643 +62 15 52.1803510   19.76 19.26 18.96   ~ 394 1
14 PSR B0940+16 Psr 09 43 30.10 +16 31 37.0           ~ 79 0
15 BAX 145.8779+16.6672 ClG 09 43 30.70 +16 40 02.0           ~ 27 0
16 BAX 145.9371+16.7467 GrG 09 43 45.0 +16 44 13           ~ 27 0
17 BAX 152.5592+54.4994 ClG 10 10 07.40 +54 26 38.6           ~ 26 0
18 XDCS cmJ101134.1+545014 ClG 10 11 25.4 +54 50 06           ~ 14 0
19 MCXC J1056.2+4933 ClG 10 56 12.6 +49 33 11           ~ 13 0
20 V* CY UMa CV* 10 56 56.9964835104 +49 41 18.201049512   17.0       ~ 111 1
21 BAX 169.3587+07.7264 ClG 11 17 26.1 +07 43 35           ~ 33 0
22 BAX 169.9321+21.4453 ClG 11 19 43.70 +21 26 43.0           ~ 26 0
23 MCG+09-19-073 Sy1 11 25 36.1539761184 +54 22 57.113791824   17.06 16.47     ~ 311 0
24 GD 140 WD* 11 37 05.1041466528 +29 47 58.288741080 11.47 12.42 12.45 12.73 12.714 DA2.2 257 0
25 7C 1219+2830 BLL 12 21 31.6904439888 +28 13 58.500308172   16.81 16.11 14.24   ~ 924 1
26 ClG J1309+3222 ClG 13 09 56.2 +32 22 14           ~ 22 0
27 US 371 BLL 13 10 28.66385420 +32 20 43.7828340   15.61 15.24 17.91   ~ 917 1
28 ClG 1308.8+3244 ClG 13 11 12.7 +32 28 58     18.5     ~ 29 0
29 XDCS cmJ131148.5+322803 ClG 13 11 48.5 +32 28 03           ~ 1 0
30 HZ 43A WD* 13 16 21.8532409720 +29 05 55.411186877   12.52 12.66     DAwk 477 0
31 Mrk 789 AGN 13 32 24.240 +11 06 22.59   15.41 14.87     ~ 123 0
32 ClG J1343+5546 ClG 13 43 26.900 +55 46 48.30           ~ 15 0
33 Z 271-60 Sy2 13 44 42.1883001099 +55 53 13.596220922   15.68 14.91     ~ 958 3
34 Z 103-14 Sy2 13 56 02.89833 +18 22 18.2982   14.8 14.22     ~ 413 2
35 XDCS cmJ142812.0+330736 ClG 14 28 12.0 +33 07 36           ~ 1 0
36 LP 271-25 LM* 14 28 43.2275214164 +33 10 39.259309081   21.2   17.8   M9Ve 262 0
37 XDCS cmJ162617.5+781706 ClG 16 26 17.5 +78 17 06           ~ 1 0
38 ClG J1633+5714 ClG 16 33 40.0 +57 14 37           ~ 16 0
39 V* CM Dra BY* 16 34 20.3302660573 +57 09 44.368918696   14.50 12.87 10.85 9.26 M4.5V 467 0
40 XDCS cmJ170232.6+514922 ClG 17 02 32.6 +51 49 22           ~ 1 0
41 XDCS cmJ170244.2+515539 ClG 17 02 44.2 +51 55 39           ~ 1 0
42 XDCS cmJ170258.9+514921 ClG 17 02 58.9 +51 49 21           ~ 1 0
43 XDCS cmJ172333.0+744410 ClG 17 23 33.0 +74 44 10           ~ 2 0
44 BAX 262.2579+74.6794 ClG 17 29 00.6 +74 40 40           ~ 11 0
45 Z 340-35 BLL 18 06 50.6802916920 +69 49 28.109609256   14.77 14.22 11.39   ~ 909 1
46 KUV 23162+1220 WD* 23 18 45.1023093816 +12 36 02.772571752   15.54 15.38     DAP4 63 0
47 XDCS cmJ231951.2+123208 ClG 23 19 51.2 +12 32 08           ~ 1 0

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