X-ray Boötes 3 Dimensional Survey (XB3dS)

Details X-ray Boötes 3 Dimensional Survey (XB3dS) X-ray Boötes 3 Dimensional Survey (XB3dS)

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...203.6103m&link_type=abstract

American Astronomical Society Meeting 203, #61.03; Bulletin of the American Astronomical Society, Vol. 35, p.1307

Astronomy and Astrophysics

Astronomy

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 contiguous area of the Boötes 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. The Boötes area was selected to overlap the NOAO Deep Wide-Filed Survey (NDWFS) where optical data, to sufficient depth, have already been obtained making the identification of candidate counterparts straight forward. Photometric and spectroscope redshifts for the X-ray sources will provide a 3 dimensional view of this ˜ 10 square degree survey region. We present here, an initial analysis of X-ray survey data showing the sky coverage, exposure map, and a characterization of the general properties of the source catalog ( ˜ 2500 sources to a limiting flux of ˜ 10-14 erg cm-2 s-1; 0.5-7.0keV). We have completed a comparison of the X-ray catalog to a 1 square degree region of NDWFS Boötes field imaging data, and determined that more than 80% of the flux limited X-ray sources are associated with unique optical counterparts. We have also examined the spatial distribution of the X-ray sources to search for evidence of cosmic variance in the X-ray source density on scales as small as the ACIS-I field of view ( ˜ 1/16 square degree) and report on the results. This work is supported in part by NASA Contract NAS8-01130.

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