Identification of 8 INTEGRAL hard X-ray sources with Chandra

被引：37
|
作者：
Sazonov, S
Churazov, E
Revnivtsev, M
Vikhlinin, A
Sunyaev, R
机构：
[1] Max Planck Inst Astrophys, D-85740 Garching, Germany
[2] Russian Acad Sci, Space Res Inst, Moscow 117997, Russia
[3] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
来源：
ASTRONOMY & ASTROPHYSICS | 2005年 / 444卷 / 02期
关键词：
surveys; galaxies : Seyfert; X-rays : general;
D O I：
10.1051/0004-6361:200500205
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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.
引用
收藏
页码：L37 / L40
页数：4
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