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[6.04] Tight constraints on the nature of the optically faint X-ray source population from the GOODS Southern Field

D. M. Alexander, F. E. Bauer, W. N. Brandt (Penn State University), R. Chary (UCSC/Caltech), M. Dickinson (Space Telescope), N. A. Grogin (John Hopkins University), A. M. Koekemoer, P. Padovani (Space Telescope), C. M. Urry (Yale University), P. Rosati (ESO), J. Bergeron (IAP,Paris), R. Fosbury (ST-ECF), S. Ettori (ESO), GOODS Team

The majority of the optically faint X-ray sources (i.e., I>24) detected in deep X-ray surveys appear to be obscured AGNs. However, their optical faintness has limited the constraints that can be placed on their redshifts, intrinsic X-ray luminosities, and relationships with other optically faint source populations (e.g., EROs and high-redshift galaxies). Here we combine the deep and extensive HST ACS and ground-based observations, obtained as part of the Great Observatories Origins Deep Survey (GOODS), with the deep X-ray observations from the 1 Ms Chandra Deep Field-South survey to place the tightest constraints to date on the nature of the optically faint X-ray source population.

Ground-based imaging data were taken at ESO 2.2m, NTT, VLT, and NOAO 4m telescopes and made publicly available.

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Bulletin of the American Astronomical Society, 34, #4
© 2002. The American Astronomical Soceity.