학술논문
The Chandra Deep Wide-Field Survey: A New Chandra Legacy Survey in the Bo\'otes Field I. X-ray Point Source Catalog, Number Counts and Multi-Wavelength Counterparts
Document Type
Working Paper
Author
Masini, A.; Hickox, R. C.; Carroll, C. M.; Aird, J.; Alexander, D. M.; Assef, R. J.; Bower, R.; Brodwin, M.; Brown, M. J. I.; Chatterjee, S.; Chen, C. -T. J.; Dey, A.; DiPompeo, M. A.; Duncan, K. J.; Eisenhardt, P. R. M.; Forman, W. R.; Gonzalez, A. H.; Goulding, A. D.; Hainline, K. N.; Jannuzi, B. T.; Jones, C.; Kochanek, C. S.; Kraft, R.; Lee, K. -S.; Miller, E. D.; Mullaney, J.; Myers, A. D.; Ptak, A.; Stanford, A.; Stern, D.; Vikhlinin, A.; Wake, D. A.; Murray, S. S.
Source
Subject
Language
Abstract
We present a new, ambitious survey performed with the Chandra X-ray Observatory of the 9.3 deg$^2$ Bo\"otes field of the NOAO Deep Wide-Field Survey. The wide field probes a statistically representative volume of the Universe at high redshift. The Chandra Deep Wide-Field Survey exploits the excellent sensitivity and angular resolution of Chandra over a wide area, combining 281 observations spanning 15 years, for a total exposure time of 3.4 Ms, and detects 6891 X-ray point sources down to limiting fluxes of $4.7\times10^{-16}$, $1.5\times10^{-16}$, and $9\times10^{-16}$ erg cm$^{-2}$ s$^{-1}$, in the $0.5-7$ keV, $0.5-2$ keV, and $2-7$ keV bands, respectively. The robustness and reliability of the detection strategy is validated through extensive, state-of-the-art simulations of the whole field. Accurate number counts, in good agreement with previous X-ray surveys, are derived thanks to the uniquely large number of point sources detected, which resolve $65.0 \pm 12.8\%$ of the cosmic X-ray background between $0.5-2$ keV and $81.0 \pm 11.5\%$ between $2-7$ keV. Exploiting the wealth of multi-wavelength data available on the field, we assign redshifts to $\sim 94\%$ of the X-ray sources, estimate their obscuration and derive absorption-corrected luminosities. We provide an electronic catalog containing all the relevant quantities needed for future investigations.
Comment: Accepted for publication in ApJS. The catalogs associated to this paper can be accessed at http://www.dartmouth.edu/~hickox/cdwfs.php
Comment: Accepted for publication in ApJS. The catalogs associated to this paper can be accessed at http://www.dartmouth.edu/~hickox/cdwfs.php