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