Multi-wavelength observations of serendipitous Chandra sources
| dc.creator | Gandhi, P. | |
| dc.creator | Crawford, C. S. | |
| dc.creator | Fabian, A. C. | |
| dc.creator | Wilman, R. J. | |
| dc.creator | Johnstone, R. M. | |
| dc.creator | Barger, A. J. | |
| dc.creator | Cowie, L. L. | |
| dc.date | 2001-06-07 | |
| dc.date.accessioned | 2026-07-25T18:10:00Z | |
| dc.description | We describe progress in a programme to study a sample of sources typical of those which contribute a large fraction of the hard X-ray background. The sources are selected from the fields of approximately 10 ks Chandra cluster observations with follow-up in the near-infrared and optical. The X-ray data indicate that many of these are powerful, obscured sources. Two hard objects which are lensed by the cluster are good candidates for X-ray type-2 quasars, with luminosities of the order 10^{44}-10^{45} erg s^{-1} and obscuring column densities of the order 10^{23} cm^{-2}. We find that the sources are bright in the infra-red (K typically 17-18). From Keck optical spectra and photometric redshifts, we find that the host galaxies are consistent with being early-type, massive hosts at redshifts ranging from 0.2 to 3, with median redshift approximately 1.5. The two obscured quasars also have mid-infrared detections and 850-micron upper-limits implying that the surrounding dust is at warm-to-hot temperatures (T of the order of 1000 K). | |
| dc.description | 10 pages, 8 figures. To appear in Proceedings of the XXI Moriond Astrophysics Meeting: "Galaxy Clusters and the High Redshift Universe Observed in X-rays", edited by D. Neumann, F.Durret & J. Tran Thanh Van | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0106139 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0106139 | |
| dc.identifier.uri | https://dspace.dare.co.zw/handle/123456789/53997 | |
| dc.subject | Astrophysics | |
| dc.title | Multi-wavelength observations of serendipitous Chandra sources | |
| dc.type | text |