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TheChandraDeep Survey of the Hubble Deep Field–North Area. II. Results from the Caltech Faint Field Galaxy Redshift Survey Area

Authors :
W. N. Brandt
Wallace L. W. Sargent
Eric D. Feigelson
David H. Lumb
David N. Burrows
Amy J. Barger
J. A. Nousek
Lennox L. Cowie
Donald P. Schneider
Lawrence W. Ramsey
Ann Hornschemeier
Mark W. Bautz
Patrick S. Broos
Gordon P. Garmire
George Chartas
Leisa K. Townsley
Richard E. Griffiths
Source :
The Astrophysical Journal. 554:742-777
Publication Year :
2001
Publisher :
American Astronomical Society, 2001.

Abstract

We present results from a 221.9 ks Chandra exposure of the HDF-N and its vicinity, concentrating on the 8.6' X 8.7' area covered by the Caltech Faint Field Galaxy Redshift Survey (the `Caltech area'). The minimum detectable fluxes in the 0.5-2 keV and 2-8 keV bands are 1.3e-16 cgs and 6.5e-16 cgs, respectively and a total of 82 sources are detected. More than 80% of the extragalactic X-ray background in the 2-8 keV band is resolved. Redshifts are available for 96% of the sources with R 5.0) objects. Where both the infrared and the X-ray coverage are deepest, 75% of the X-ray sources are detected by ISO; the high X-ray to infrared matching rate bodes well for future sensitive infrared observations of faint X-ray sources. Four of the 33 very red objects that have been identified in the Caltech area by Hogg et al. (2000) are detected in X-rays; these four are among our hardest Chandra sources, and we argue that they contain moderately luminous obscured AGN. Overall, however, the small Chandra detection fraction suggests a relatively small AGN content in the optically selected very red object population. (Abridged)<br />75 pages, ApJ, in press, version with full resolution figures available from http://www.astro.psu.edu/users/niel/hdf/hdf-chandra.html

Details

ISSN :
15384357 and 0004637X
Volume :
554
Database :
OpenAIRE
Journal :
The Astrophysical Journal
Accession number :
edsair.doi.dedup.....bed77dd6a398b21b8b0517865ec907c1
Full Text :
https://doi.org/10.1086/321420