Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-10-25
Astronomy and Astrophysics
Astrophysics
Submitted to ApJS. 21 pages using emulateapj. More information ans survey data tables are available at http://hea-www.harvard.
Scientific paper
10.1086/519457
We present a catalog of galaxy clusters detected in a new ROSAT PSPC survey. The survey is optimized to sample, at high redshifts, the mass range corresponding to T> keV clusters at z=0. Technically, our survey is the extension of the 160 square degrees survey (Vikhlinin etal 98a, Mullis etal 2003). We use the same detection algorithm, thus preserving high quality of the resulting sample; the main difference is a significant increase in sky coverage. The new survey covers 397 square degrees and is based on 1610 high Galactic latitude ROSAT PSPC pointings, virtually all pointed ROSAT data suitable for the detection of distant clusters. The search volume for X-ray luminous clusters within z<1 exceeds that of the entire local Universe (z<0.1). We detected 287 extended X-ray sources with fluxes f>1.4e-13 erg/s/cm^2 in the 0.5-2 keV energy band, of which 266 (93%) are optically confirmed as galaxy clusters, groups or individual elliptical galaxies. This paper provides a description of the input data, the statistical calibration of the survey via Monte-Carlo simulations, and the catalog of detected clusters. We also compare the basic results to those from previous, smaller area surveys and find good agreement for the log N - log S distribution and the local X-ray luminosity function. Our sample clearly shows a decrease in the number density for the most luminous clusters at z>0.3. The comparison of our ROSAT-derived fluxes with the accurate Chandra measurements for a subset of high-redshift clusters demonstrates the validity of the 400 square degree survey's statistical calibration.
Burenin R. A.
Ebeling Harald
Hornstrup Allan
Mescheryakov A.
Quintana Hernan
No associations
LandOfFree
The 400 square degrees ROSAT PSPC galaxy cluster survey: Catalog and statistical calibration does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The 400 square degrees ROSAT PSPC galaxy cluster survey: Catalog and statistical calibration, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The 400 square degrees ROSAT PSPC galaxy cluster survey: Catalog and statistical calibration will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-377948