2004A&A...428...21M


Query : 2004A&A...428...21M

2004A&A...428...21M - Astronomy and Astrophysics, volume 428, 21-37 (2004/12-2)

The Brera Multi-scale Wavelet HRI Cluster Survey. I. Selection of the sample and number counts.

MORETTI A., GUZZO L., CAMPANA S., LAZZATI D., PANZERA M.R., TAGLIAFERRI G., ARENA S., BRAGLIA F., DELL'ANTONIO I. and LONGHETTI M.

Abstract (from CDS):

We describe the construction of the Brera Multi-scale Wavelet (BMW) HRI Cluster Survey, a deep sample of serendipitous X-ray selected clusters of galaxies based on the ROSAT HRI archive. This is the first cluster catalog exploiting the high angular resolution of this instrument. Cluster candidates are selected on the basis of their X-ray extension only, a parameter which is well measured by the BMW wavelet detection algorithm. The survey includes 154 candidates over a total solid angle of ∼160deg2 at 10–12erg/s/cm2 and ∼80deg2 at 1.8x10–13erg/s/cm2. At the same time, a fairly good sky coverage in the faintest flux bins (3-5x10–14erg/s/cm2) gives this survey the capability of detecting a few clusters with z∼1-1.2, depending on evolution. We present the results of extensive Monte Carlo simulations, providing a complete statistical characterization of the survey selection function and contamination level. We also present a new estimate of the surface density of clusters of galaxies down to a flux of 3x10–14erg/s/cm2, which is consistent with previous measurements from PSPC-based samples. Several clusters with redshifts up to z=0.92 have already been confirmed, either by cross-correlation with existing PSPC surveys or from early results of an ongoing follow-up campaign. Overall, these results indicate that the excellent HRI PSF (5" FWHM on axis) more than compensates for the negative effect of the higher instrumental background on the detection of high-redshift clusters. In addition, it allows us to detect compact clusters that could be lost at lower resolution, thus potentially providing an important new insight into cluster evolution.

Abstract Copyright:

Journal keyword(s): X-rays: galaxies: clusters - surveys - cosmology: large-scale structure of Universe

Nomenclature: Text: BMW-HRI JHHMMSS.s+DDMMSS N=9 among 154.

Status at CDS : Objects in title, abstract, text, figures, and all or part of small table(s) being processed in SIMBAD.

Simbad objects: 12

goto Full paper

goto View the references in ADS

Number of rows : 12
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 BMW-HRI J000141.3-154042 ClG 00 01 41.3 -15 40 42           ~ 1 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10681 1
3 BMW-HRI J044743.4-202042 ClG 04 47 43.4 -20 20 42           ~ 1 0
4 ClG J0522-3624 ClG 05 22 13.8 -36 24 49           ~ 37 0
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16748 1
6 BMW-HRI J112059.0+130450 ClG 11 20 59.0 +13 04 50           ~ 1 0
7 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6448 0
8 ClG J1226+3332 ClG 12 26 57.7 +33 32 50           ~ 208 0
9 BMW-HRI J122842.6-391612 ClG 12 28 42.6 -39 16 12           ~ 1 0
10 BMW-HRI J134654.9-301328 ClG 13 46 54.9 -30 13 28           ~ 1 0
11 BMW-HRI J145754.0-212458 ClG 14 57 54.0 -21 24 58           ~ 1 0
12 BMW-HRI J212415.7-334754 ClG 21 24 15.7 -33 47 54           ~ 1 0

To bookmark this query, right click on this link: simbad:objects in 2004A&A...428...21M and select 'bookmark this link' or equivalent in the popup menu


2023.05.31-11:56:42

© Université de Strasbourg/CNRS

    • Contact