Access to Astronomical Catalogues

← Click to display the menu
J/A+A/396/397   Deep cluster survey in Chandra archival data    (Boschin+, 2002)

A deep cluster survey in Chandra archival data. First results. Boschin W. <Astron. Astrophys., 396, 397-409 (2002)> =2002A&A...396..397B
ADC_Keywords: Clusters, galaxy ; X-ray sources Keywords: cosmology: large-scale structure of Universe - galaxies: clusters: general - X-rays: galaxies: clusters Abstract: I present the first results of a search for clusters of galaxies in Chandra ACIS pointed observations at high galactic latitude with exposure times larger than 10ks. The survey is being carried out using the Voronoi Tessellation and Percolation technique, which is particularly suited for the detection and accurate quantification of extended and/or low surface brightness emission in X-ray imaging observations. A new catalogue of 36 cluster candidates has been created from 5.55deg2 of surveyed area. Five of these candidates have already been associated to visible enhancements of the projected galaxy distribution in low deepness DSS-II fields and are probably low-to moderate redshift systems. Three of the candidates have been identified in previous ROSAT-based surveys. I show that a significative fraction (30-40%) of the candidate clusters are probably intermediate to high redshift systems. In this paper I publish the catalogue of these first candidate clusters. I also derive the number counts of clusters and compare it with the results of deep ROSAT-based cluster surveys. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 49 36 The cluster catalogue
See also: B/chandra : The Chandra Archive Log (CXC, 1999-) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 2 I2 --- [B2002c] Sequential number 4- 11 F8.4 deg RAdeg Right ascension in decimal degrees (J2000) 13- 20 F8.4 deg DEdeg Declination in decimal degrees (J2000) 22- 28 E7.2 mW/m2 FX X-ray flux 30- 36 E7.2 mW/m2 e_FX rms uncertainty on FX 38- 41 F4.1 arcsec r Estimated characteristic radius 43- 47 F5.2 --- S/N Signal-to-noise ratio 49 A1 --- Note Note (1)
Note (1): Notes as follows: 1 = z=0.4 cluster (No 97, Vikhlinin et al., 1998, J/ApJ/502/558) 2 = z=0.16 cluster (RIXOS F258-101, Mason et al. 2000, J/MNRAS/311/456) 3 = cluster MS 1358.4+6245 at z=0.328 P = flux uncertain due to the presence of a nearby pointlike source B = source very close to the border of the X-ray image
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 02-May-2006
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service