The ELAIS deep X-ray survey - I. Chandra source catalogue and first results

Manners, J.C. and Johnson, O. and Almaini, O. and Willott, C.J. and Gonzalez-Solares, Eduardo and Lawrence, A. and Mann, Robert G. and Perez-Fournon, Ismael and Dunlop, James S. and McMahon, R.G. and Oliver, S.J. and Rowan-Robinson, Michael and Serjeant, Stephen (2003) The ELAIS deep X-ray survey - I. Chandra source catalogue and first results. Monthly Notices of the Royal Astronomical Society, 343 (1). pp. 293-305. ISSN 0035-8711. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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We present an analysis of two deep (75 ks) Chandra observations of the European Large Area Infrared Space Observatory (ISO) Survey (ELAIS) fields N1 and N2 as the first results from the ELAIS deep X-ray survey. This survey is being conducted in well-studied regions with extensive multiwavelength coverage. Here we present the Chandra source catalogues along with an analysis of source counts, hardness ratios and optical classifications. A total of 233 X-ray point sources are detected in addition to two soft extended sources, which are found to be associated with galaxy clusters. An overdensity of sources is found in N1 with 30 per cent more sources than N2, which we attribute to large-scale structure. A similar variance is seen between other deep Chandra surveys. The source count statistics reveal an increasing fraction of hard sources at fainter fluxes. The number of galaxy-like counterparts also increases dramatically towards fainter fluxes, consistent with the emergence of a large population of obscured sources.

Item Type: Article
Additional information: 35 BLACKWELL PUBLISHING LTD 700JE
Uncontrolled keywords: catalogues; surveys; galaxies : active; X-rays : diffuse background; X-rays : galaxies; X-rays : general ACTIVE GALACTIC NUCLEI; FIELD NORTH SURVEY; N-LOG S; SPECTRAL PROPERTIES; SCUBA-8-MJY SURVEY; OPTICAL SURVEY; LOCKMAN HOLE; ROSAT SURVEY; SUBMILLIMETER; SOUTH
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences
Depositing User: Maggie Francis
Date Deposited: 10 Sep 2008 12:34
Last Modified: 17 Jul 2014 13:55
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