THE CHANDRA X-RAY POINT-SOURCE CATALOG IN THE DEEP2 GALAXY REDSHIFT SURVEY FIELDS
- Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States)
- Department of Physics, Center for Astrophysics and Space Sciences, University of California at San Diego, La Jolla, San Diego, CA 92093 (United States)
- Center for Galaxy Evolution, Department of Physics and Astronomy, University of California, Irvine, Irvine, CA 92697 (United States)
- Department of Astronomy, University of California, Berkeley, Berkeley, CA 94720 (United States)
We present the X-ray point-source catalog produced from the Chandra Advanced CCD Imaging Spectrometer (ACIS-I) observations of the combined {approx}3.2 deg{sup 2} DEEP2 (XDEEP2) survey fields, which consist of four {approx}0.7-1.1 deg{sup 2} fields. The combined total exposures across all four XDEEP2 fields range from {approx}10 ks to 1.1 Ms. We detect X-ray point sources in both the individual ACIS-I observations and the overlapping regions in the merged (stacked) images. We find a total of 2976 unique X-ray sources within the survey area with an expected false-source contamination of Almost-Equal-To 30 sources ({approx}< 1%). We present the combined log N-log S distribution of sources detected across the XDEEP2 survey fields and find good agreement with the Extended Chandra Deep Field and Chandra-COSMOS fields to f{sub X,0.5-2keV} {approx} 2x10{sup -16} erg cm{sup -2}s{sup -1}. Given the large survey area of XDEEP2, we additionally place relatively strong constraints on the log N-log S distribution at high fluxes (f{sub X,0.5-2keV} {approx} 3x10{sup -14} erg cm -{sup 2}s{sup -1}), and find a small systematic offset (a factor {approx}1.5) toward lower source numbers in this regime, when compared to smaller area surveys. The number counts observed in XDEEP2 are in close agreement with those predicted by X-ray background synthesis models. Additionally, we present a Bayesian-style method for associating the X-ray sources with optical photometric counterparts in the DEEP2 catalog (complete to R{sub AB} < 25.2) and find that 2126 ( Almost-Equal-To 71.4% {+-} 2.8%) of the 2976 X-ray sources presented here have a secure optical counterpart with a {approx}< 6% contamination fraction. We provide the DEEP2 optical source properties (e.g., magnitude, redshift) as part of the X-ray-optical counterpart catalog.
- OSTI ID:
- 22089877
- Journal Information:
- Astrophysical Journal, Supplement Series, Vol. 202, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0067-0049
- Country of Publication:
- United States
- Language:
- English
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