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Title: THE CHANDRA X-RAY POINT-SOURCE CATALOG IN THE DEEP2 GALAXY REDSHIFT SURVEY FIELDS

Abstract

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 predictedmore » 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.« less

Authors:
; ; ; ; ; ;  [1];  [2];  [3];  [4]
  1. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States)
  2. Department of Physics, Center for Astrophysics and Space Sciences, University of California at San Diego, La Jolla, San Diego, CA 92093 (United States)
  3. Center for Galaxy Evolution, Department of Physics and Astronomy, University of California, Irvine, Irvine, CA 92697 (United States)
  4. Department of Astronomy, University of California, Berkeley, Berkeley, CA 94720 (United States)
Publication Date:
OSTI Identifier:
22089877
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal, Supplement Series
Additional Journal Information:
Journal Volume: 202; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0067-0049
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTROPHYSICS; CATALOGS; CHARGE-COUPLED DEVICES; COSMIC X-RAY SOURCES; GAMMA ASTRONOMY; KEV RANGE; PHOTOMETRY; POINT SOURCES; RED SHIFT; UNIVERSE; X-RAY GALAXIES

Citation Formats

Goulding, A. D., Forman, W. R., Hickox, R. C., Jones, C., Kraft, R., Murray, S. S., Vikhlinin, A., Coil, A. L., Cooper, M. C., Davis, M., and Newman, J. A., E-mail: agoulding@cfa.harvard.edu. THE CHANDRA X-RAY POINT-SOURCE CATALOG IN THE DEEP2 GALAXY REDSHIFT SURVEY FIELDS. United States: N. p., 2012. Web. doi:10.1088/0067-0049/202/1/6.
Goulding, A. D., Forman, W. R., Hickox, R. C., Jones, C., Kraft, R., Murray, S. S., Vikhlinin, A., Coil, A. L., Cooper, M. C., Davis, M., & Newman, J. A., E-mail: agoulding@cfa.harvard.edu. THE CHANDRA X-RAY POINT-SOURCE CATALOG IN THE DEEP2 GALAXY REDSHIFT SURVEY FIELDS. United States. https://doi.org/10.1088/0067-0049/202/1/6
Goulding, A. D., Forman, W. R., Hickox, R. C., Jones, C., Kraft, R., Murray, S. S., Vikhlinin, A., Coil, A. L., Cooper, M. C., Davis, M., and Newman, J. A., E-mail: agoulding@cfa.harvard.edu. 2012. "THE CHANDRA X-RAY POINT-SOURCE CATALOG IN THE DEEP2 GALAXY REDSHIFT SURVEY FIELDS". United States. https://doi.org/10.1088/0067-0049/202/1/6.
@article{osti_22089877,
title = {THE CHANDRA X-RAY POINT-SOURCE CATALOG IN THE DEEP2 GALAXY REDSHIFT SURVEY FIELDS},
author = {Goulding, A. D. and Forman, W. R. and Hickox, R. C. and Jones, C. and Kraft, R. and Murray, S. S. and Vikhlinin, A. and Coil, A. L. and Cooper, M. C. and Davis, M. and Newman, J. A., E-mail: agoulding@cfa.harvard.edu},
abstractNote = {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.},
doi = {10.1088/0067-0049/202/1/6},
url = {https://www.osti.gov/biblio/22089877}, journal = {Astrophysical Journal, Supplement Series},
issn = {0067-0049},
number = 1,
volume = 202,
place = {United States},
year = {Sat Sep 15 00:00:00 EDT 2012},
month = {Sat Sep 15 00:00:00 EDT 2012}
}