X-ray three-dimensional survey in the NDWFS Bootes field: large area chandra shallow x-ray survey-I

Details X-ray three-dimensional survey in the NDWFS Bootes field: large area chandra shallow x-ray survey-I X-ray three-dimensional survey in the NDWFS Bootes field: large area chandra shallow x-ray survey-I

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5488..242m&link_type=abstract

UV and Gamma-Ray Space Telescope Systems. Edited by Hasinger, Günther; Turner, Martin J. L. Proceedings of the SPIE, Volume 548

Mathematics

Scientific paper

In March and April 2003, the Chandra X-ray Observatory carried out a series of 126 short observations (5 ksec each) covering a continuous area of the Bo\"otes constellation to construct a large area shallow X-ray survey. These observations were carried out as collaboration of Guest Observer (C. Jones PI) and Guaranteed Time Observer (S. Murray PI) programs. We present here, in Paper I, an initial analysis of the survey data and the source detection process, showing the sky coverage, exposure map, and some of the collective properties of the resulting catalog of sources. The Bo\"otes area was selected to overlap a well studied region where optical, and radio data, to sufficient depth, have already been obtained making the identification of candidate counterparts straight forward. In 5 ksec, we reach a limiting flux of $\sim10^{-3}\:\mathrm{ct\, s^{-1}}$ (corresponding to $\sim10^{-14}\,\mathrm{erg\, cm^{-2}s^{-1}\:0.5-7.0\: keV}$). We examine the spatial distribution of the sources in this \textasciitilde{}9.3 square degree survey region using several techniques to search for evidence of cosmic variance in the X-ray source density on scales as small as the ACIS-I field of view (\textasciitilde{}16x16 arc minutes). With follow up optical spectroscopy using the MMT/Hectospec, we can obtain spectroscopic redshifts for about 1/3 - 1./2 of the X-ray sources, which can be used to look for evidence of large scale structures traced by AGN associated with the cosmic web.

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