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
相关论文
共 11 条
  • [1] BIKMAEV I, 2005, UNPUB
  • [2] Deep extragalactic X-ray surveys
    Brandt, WN
    Hasinger, G
    [J]. ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 2005, 43 : 827 - 859
  • [3] Event pileup in charge-coupled devices
    Davis, JE
    [J]. ASTROPHYSICAL JOURNAL, 2001, 562 (01) : 575 - 582
  • [4] H I IN THE GALAXY
    DICKEY, JM
    LOCKMAN, FJ
    [J]. ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1990, 28 : 215 - 261
  • [5] Extragalactic source counts in the 20-50 kev energy band from the deep observation of the coma region by INTEGRAL IBIS
    Krivonos, R
    Vikhlinin, A
    Churazov, E
    Lutovinov, A
    Molkov, S
    Sunyaev, R
    [J]. ASTROPHYSICAL JOURNAL, 2005, 625 (01) : 89 - 94
  • [6] Unveiling the nature of three INTEGRAL sources through optical spectroscopy
    Masetti, N
    Palazzi, E
    Bassani, L
    Malizia, A
    Stephen, JB
    [J]. ASTRONOMY & ASTROPHYSICS, 2004, 426 (02) : L41 - L44
  • [7] A UBVR CCD survey of the Magellanic Clouds
    Massey, P
    [J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2002, 141 (01) : 81 - 122
  • [8] The resolved fraction of the cosmic X-ray background
    Moretti, A
    Campana, S
    Lazzati, D
    Tagliaferri, G
    [J]. ASTROPHYSICAL JOURNAL, 2003, 588 (02) : 696 - 703
  • [9] RXTE all-sky slew survey.: Catalog of X-ray sources at |b|>10°
    Revnivtsev, M
    Sazonov, S
    Jahoda, K
    Gilfanov, M
    [J]. ASTRONOMY & ASTROPHYSICS, 2004, 418 (03) : 927 - 936
  • [10] Statistical properties of local active galactic nuclei inferred from the RXTE 3-20 keV all-sky survey
    Sazonov, SY
    Revnivtsev, MG
    [J]. ASTRONOMY & ASTROPHYSICS, 2004, 423 (02) : 469 - 480
12