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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.

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 Thumbnail


Alberto Masini

Ryan C. Hickox

Christopher M. Carroll

James Aird

Roberto J. Assef

Richard Bower

Mark Brodwin

Michael J.I. Brown

Suchetana Chatterjee

Chien-Ting J. Chen

Arjun Dey

Michael A. DiPompeo

Kenneth J. Duncan

Peter R.M. Eisenhardt

William R. Forman

Anthony H. Gonzalez

Andrew D. Goulding

Kevin N. Hainline

Buell T. Jannuzi

Christine Jones

Christopher S. Kochanek

Ralph Kraft

Kyoung-Soo Lee

Eric D. Miller

James Mullaney

Adam D. Myers

Andrew Ptak

Adam Stanford

Daniel Stern

Alexey Vikhlinin

David A. Wake

Stephen S. Murray


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.

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
Public URL


Published Journal Article (16.9 Mb)

Copyright Statement
© 2020. The American Astronomical Society. All rights reserved.

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