The Chandra Deep Wide-field Survey: A New Chandra Legacy Survey in the Boötes Field. I. X-Ray Point Source Catalog, Number Counts, and Multiwavelength Counterparts

Masini, Alberto; Hickox, Ryan C.; Carroll, Christopher M.; Aird, James; Alexander, David M.; Assef, Roberto J.; Bower, Richard; Brodwin, Mark; Brown, Michael J.I.; Chatterjee, Suchetana; Chen, Chien-Ting J.; Dey, Arjun; DiPompeo, Michael A.; Duncan, Kenneth J.; Eisenhardt, Peter R.M.; Forman, William R.; Gonzalez, Anthony H.; Goulding, Andrew D.; Hainline, Kevin N.; Jannuzi, Buell T.; Jones, Christine; Kochanek, Christopher S.; Kraft, Ralph; Lee, Kyoung-Soo; Miller, Eric D.; Mullaney, James; Myers, Adam D.; Ptak, Andrew; Stanford, Adam; Stern, Daniel; Vikhlinin, Alexey; Wake, David A.; Murray, Stephen S.

Abstract

We present a new, ambitious survey performed with the Chandra X-ray Observatory of the 9.3 deg2 Boötes 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 yr, for a total exposure time of 3.4 Ms, and detects 6891 X-ray point sources down to limiting fluxes of 4.7 × 10−16, 1.5 × 10−16, and 9 ×10−16 erg cm−2 s−1 in the 0.5–7, 0.5–2, and 2–7 keV bands, respectively. The robustness and reliability of the detection strategy are 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% ± 12.8% of the cosmic X-ray background between 0.5 and 2 keV and 81.0% ± 11.5% between 2 and 7 keV. Exploiting the wealth of multiwavelength data available on the field, we assign redshifts to ~94% of the X-ray sources, estimate their obscuration, and derive absorption-corrected luminosities. We provide an electronic catalog containing all of the relevant quantities needed for future investigations.

Citation

Masini, A., Hickox, R. C., Carroll, C. M., Aird, J., Alexander, D. M., Assef, R. J., Bower, R., Brodwin, M., Brown, M. J., Chatterjee, S., Chen, C.-T. J., Dey, A., DiPompeo, M. A., Duncan, K. J., Eisenhardt, P. R., Forman, W. R., Gonzalez, A. H., Goulding, A. D., Hainline, K. N., Jannuzi, B. T., …Murray, S. S. (2020). The Chandra Deep Wide-field Survey: A New Chandra Legacy Survey in the Boötes Field. I. X-Ray Point Source Catalog, Number Counts, and Multiwavelength Counterparts. Astrophysical Journal Supplement, 251(1), Article 2. https://doi.org/10.3847/1538-4365/abb607

• Journal Article Type: Article
• Acceptance Date: Sep 6, 2020
• Online Publication Date: Oct 22, 2020
• Publication Date: 2020-11
• Deposit Date: Nov 17, 2020
• Publicly Available Date: Nov 17, 2020
• Journal: Astrophysical Journal Supplement
• Print ISSN: 0067-0049
• Electronic ISSN: 1538-4365
• Publisher: American Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 251
• Issue: 1
• Article Number: 2
• DOI: https://doi.org/10.3847/1538-4365/abb607
• Public URL: https://durham-repository.worktribe.com/output/1285353