期刊
ASTRONOMY & ASTROPHYSICS
卷 444, 期 2, 页码 L37-L40出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361:200500205
关键词
surveys; galaxies : Seyfert; X-rays : general
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 have 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 (N-H in the range 10(22)-10(24) cm cm(-2)) in all 5 AGNs, demonstrating that INTEGRAL is starting to fill in the sample of nearby obscured AGNs.
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