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XBootes: An X-Ray Survey of the NDWFS Bootes Field - Paper I Overview and Initial Results | | Stephen S. Murray
; Almus Kenter
; William R. Forman
; Christine Jones
; Paul J. Green
; Christopher S. Kochanek
; Alexey Vikhlinin
; Daniel Fabricant
; Giovani Fazio
; Kate Brand
; Michael J. I. Brown
; Arjun Dey
; Buell T. Jannuzi
; Joan Najita
; Brian McNamara
; Joseph Shields
; Marcia Rieke
; | | Date: |
4 Apr 2005 | | Subject: | astro-ph | | Affiliation: | 2 and 6), Arjun Dey , Buell T. Jannuzi , Joan Najita , Brian McNamara , Joseph Shields and Marcia Rieke ( CfA, NOAO, Ohio University, Steward Observatory, The Ohio State University, Princeton University | | Abstract: | We obtained a 5 ksec deep Chandra X-ray Observatory ACIS-I map of the 9.3 square degree Bootes field of the NOAO Deep Wide-Field Survey. Here we describe the data acquisition and analysis strategies leading to a catalog of 4642 (3293) point sources with 2 or more (4 or more) counts, corresponding to a limiting flux of roughly 4(8)x10^{-15} erg cm^{-2}s^{-1} in the 0.5-7 keV band. These Chandra XBootes data are unique in that they consitute the widest contiguous X-ray field yet observed to such a faint flux limit. Because of the extraordinarily low background of the ACIS, we expect only 14% (0.7%) of the sources to be spurious. We also detected 43 extended sources in this survey. The distribution of the point sources among the 126 pointings (ACIS-I has a 16 x 16 arcminute field of view) is consistent with Poisson fluctuations about the mean of 36.8 sources per pointing. While a smoothed image of the point source distribution is clumpy, there is no statistically significant evidence of large scale filamentary structure. We do find however, that for theta>1 arcminute, the angular correlation function of these sources is consistent with previous measurements, following a power law in angle with slope -0.7. In a 1.4 deg^{2} sample of the survey, approximately 87% of the sources with 4 or more counts have an optical counterpart to R ~26 mag. As part of a larger program of optical spectroscopy of the NDWFS Bootes area, spectra have been obtained for ~900 of the X-ray sources, most of which are QSOs or AGN. | | Source: | arXiv, astro-ph/0504084 | | Services: | Forum | Review | PDF | Favorites | |
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