The first INTEGRAL AGN catalog

被引:84
作者
Beckmann, V
Gehrels, N
Shrader, CR
Soldi, S
机构
[1] NASA, Goddard Space Flight Ctr, Explorat Universe Div, Greenbelt, MD 20771 USA
[2] INTEGRAL Sci Data Ctr, CH-1290 Versoix, Switzerland
[3] Univ Maryland Baltimore Cty, Joint Ctr Astrophys, Dept Phys, Baltimore, MD 21250 USA
[4] Univ Space Res Assoc, Columbia, MD 21044 USA
[5] Observ Geneva, CH-1290 Sauverny, Switzerland
关键词
catalogs; galaxies : active; galaxies : Seyfert; gamma rays : observations; X-rays : galaxies;
D O I
10.1086/499034
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present the first INTEGRAL AGN catalog, based on observations performed from launch of the mission in 2002 October until 2004 January. The catalog includes 42 AGNs, of which 10 are Seyfert 1, 17 are Seyfert 2, and 9 are intermediate Seyfert 1.5. The fraction of blazars is rather small, with five detected objects, and only one galaxy cluster and no starburst galaxies have been detected so far. A complete subset consists of 32 AGNs with a significance limit of 7 sigma in the INTEGRAL ISGRI 20-40 keV data. Although the sample is not flux limited, the distribution of sources shows a ratio of obscured to unobscured AGNs of 1.5-2.0, consistent with luminosity-dependent unified models for AGNs. Only four Compton-thick AGNs are found in the sample. Based on the INTEGRAL data presented here, the Seyfert 2 spectra are slightly harder (Gamma = 1.95 +/- 0: 01) than Seyfert 1.5 (Gamma = 2.10 +/- 0.02) and Seyfert 1 (Gamma = 2.11 +/- 0: 05).
引用
收藏
页码:642 / 652
页数:11
相关论文
共 69 条
  • [1] Arnaud KA, 1996, ASTR SOC P, V101, P17
  • [2] SIMULTANEOUS ANALYSIS OF SEVERAL COMPLETE SAMPLES - V-VMAX AND VE-VA VARIABLES, WITH APPLICATIONS TO QUASARS
    AVNI, Y
    BAHCALL, JN
    [J]. ASTROPHYSICAL JOURNAL, 1980, 235 (03) : 694 - 716
  • [3] Spectral energy distributions of 3C 279 revisited:: BeppoSAX observations and variability models
    Ballo, L
    Maraschi, L
    Tavecchio, F
    Celotti, A
    Fossati, G
    Ghisellini, G
    Pian, E
    Raiteri, CM
    Tagliaferri, G
    Treves, A
    Urry, CM
    Villata, M
    [J]. ASTROPHYSICAL JOURNAL, 2002, 567 (01) : 50 - 57
  • [4] The cosmic evolution of hard X-ray-selected active galactic nuclei
    Barger, AJ
    Cowie, LL
    Mushotzky, RF
    Yang, Y
    Wang, WH
    Steffen, AT
    Capak, P
    [J]. ASTRONOMICAL JOURNAL, 2005, 129 (02) : 578 - 609
  • [5] DETECTION OF SOFT GAMMA-RAY EMISSION FROM THE SEYFERT-2 GALAXY NGC-4507 BY THE OSSE TELESCOPE
    BASSANI, L
    MALAGUTI, G
    JOURDAIN, E
    ROQUES, JP
    JOHNSON, WN
    [J]. ASTROPHYSICAL JOURNAL, 1995, 444 (02) : L73 - L76
  • [6] Bassani L, 2004, ESA SPEC PUBL, V552, P139
  • [7] The high-energy spectrum of NGC 4151
    Beckmann, V
    Shrader, CR
    Gehrels, N
    Soldi, S
    Lubinski, P
    Zdziarski, AA
    Petrucci, PO
    Malzac, J
    [J]. ASTROPHYSICAL JOURNAL, 2005, 634 (02) : 939 - 946
  • [8] INTEGRAL and XMM-Newton spectral studies of NGC 4388
    Beckmann, V
    Gehrels, N
    Favre, P
    Walter, R
    Courvoisier, TJL
    Petrucci, PO
    Malzac, J
    [J]. ASTROPHYSICAL JOURNAL, 2004, 614 (02) : 641 - 647
  • [9] The recent X-ray history of NGC 5506
    Bianchi, S
    Balestra, I
    Matt, G
    Guainazzi, M
    Perola, GC
    [J]. ASTRONOMY & ASTROPHYSICS, 2003, 402 (01) : 141 - 149
  • [10] BeppoSAX, the wide band mission for X-ray astronomy
    Boella, G
    Butler, RC
    Perola, GC
    Piro, L
    Scarsi, L
    Bleeker, JAM
    [J]. ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1997, 122 (02): : 299 - 307