Identification of 8 INTEGRAL hard X-ray sources with Chandra
Abstract
We report the results of identification of 8 hard X-ray sources discovered by the INTEGRAL observatory during the ongoing all-sky survey. These sources have been observed by Chandra. In 6 cases a bright X-ray source was found within the INTEGRAL localization region, which permitted to unambiguously identify 5 of the objects with nearby galaxies, implying that they have an active galactic nucleus (AGN), whereas one source is likely an X-ray binary in LMC. 4 of the 5 newly discovered AGNs have measured redshifts in the range 0.025-0.055. The X-ray spectra reveal the presence of significant amounts of absorbing gas (NH in the range 1022-1024 cm-2) in all 5 AGNs, demonstrating that INTEGRAL is starting to fill in the sample of nearby obscured AGNs.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- December 2005
- DOI:
- 10.1051/0004-6361:200500205
- arXiv:
- arXiv:astro-ph/0508593
- Bibcode:
- 2005A&A...444L..37S
- Keywords:
-
- surveys;
- galaxies: Seyfert;
- X-rays: general;
- Astrophysics
- E-Print:
- 4 pages, 2 figures, corrected Fig. 2