2006ApJ...645..955B -
Astrophys. J., 645, 955-976 (2006/July-2)
ChaMP serendipitous galaxy cluster survey.
BARKHOUSE W.A., GREEN P.J., VIKHLININ A., KIM D.-W., PERLEY D., CAMERON R., SILVERMAN J., MOSSMAN A., BURENIN R., JANNUZI B.T., KIM M., SMITH M.G., SMITH R.C., TANANBAUM H. and WILKES B.J.
Abstract (from CDS):
We present a survey of serendipitous extended X-ray sources and optical cluster candidates from the Chandra Multiwavelength Project (ChaMP). Our main goal is to make an unbiased comparison of X-ray and optical cluster detection methods. In 130 archival Chandra pointings covering 13 deg2, we use a wavelet decomposition technique to detect 55 extended sources, of which 6 are nearby single galaxies. Our X-ray cluster catalog reaches a typical flux limit of about ∼10–14 ergs/cm2/s, with a median cluster core radius of 21''. For 56 of the 130 X-ray fields, we use the ChaMP's deep NOAO 4 m MOSAIC g', r', and i' imaging to independently detect cluster candidates using a Voronoi tessellation and percolation (VTP) method. Red-sequence filtering decreases the galaxy fore- and background contamination and provides photometric redshifts to z∼0.7. From the overlapping 6.1 deg2 X-ray/optical imaging, we find 115 optical clusters (of which 11% are in the X-ray catalog) and 28 X-ray clusters (of which 46% are in the optical VTP catalog). The median redshift of the 13 X-ray/optical clusters is 0.41, and their median X-ray luminosity (0.5-2 keV) is LX=2.65±0.19x1043 ergs/s. The clusters in our sample that are only detected in our optical data are poorer on average (∼4 σ) than the X-ray/optically matched clusters, which may partially explain the difference in the detection fractions.
Abstract Copyright:
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Journal keyword(s):
Galaxies: Clusters: General - Surveys - X-Rays: Galaxies: Clusters
VizieR on-line data:
<Available at CDS (J/ApJ/645/955): table1.dat table3.dat table4.dat table5.dat table6.dat>
Nomenclature:
Table 4: [BGV2006] NNN (Nos 1-102).
Status at CDS
:
All or part of tables of objects could be ingested in SIMBAD with priority 2.
CDS comments:
Table 5 : SDSS CE J016.528793+00.817471 not identified
Simbad objects:
159
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