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High-energy properties of PKS 1830-211
Zhang S(张澍); Chen YP(陈玉鹏); Li TB(李惕碚); Wang JM(王建民); Zhang, S; Chen, YP; Collmar, W; Foschini, L; Li, TP; Torres, DF; Wang, JM
2008
发表期刊ASTROPHYSICAL JOURNAL
卷号683期号:1页码:400-408
通讯作者[Zhang, Shu ; Chen, Yu-Peng ; Li, Ti-Pei ; Wang, Jian-Min] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China ; [Collmar, Werner] Max Planck Inst Extraterr Phys, D-85740 Garching, Germany ; [Foschini, Luigi] INAF, Ist Astrofis Spaziale & Fis Cosm, Sez Bologna, I-40129 Bologna, Italy ; [Li, Ti-Pei] Tsinghua Univ, Ctr Astrophys, Beijing 100084, Peoples R China ; [Torres, Diego F.] Inst Catalana Rec & Estudis Avancats, E-08193 Barcelona, Spain ; [Torres, Diego F.] IEEC CSIC, Inst Ciencies Espai, E-08193 Barcelona, Spain ; [Wang, Jian-Min] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100864, Peoples R China
文章类型Article
摘要We report an analysis of X-ray and gamma-ray observations of PKS 1830-211, based on long-term campaigns carried out by INTEGRAL and COMPTEL. The INTEGRAL data currently available provide a 33 sigma significance detection in the 20-100 keV band, while the COMPTEL 6 yr data provide a 5.2 sigma significance detection in the 1-3 MeV energy band. In hard X-rays, INTEGRAL and supplementary Swift observations show flux variability on timescales of months. In gamma-rays, the source shows persistent emission over years. The hard X-ray spectrum is well represented by a power-law model, with Gamma similar to 1.3 in the 20-250 keV band. This photon index is consistent with a previous report of Gamma similar to 1.3 obtained at E > 3.5 keV from XMM-Newton data fitted with a broken power law model. The joint XMM-Newton and INTEGRAL spectrum presented here is thus fitted with a broken power law model; the parameters are refined as compared with the previous fit. The results show that the photon index changes from similar to 1.0 to similar to 1.3 at a break energy of similar to 4 keV. At MeV energies, the spectrum softens to Gamma similar to 2.2. These results, together with an EGRET measurement at E >= 100 MeV, constitute a broadband spectrum containing the peak of the power output at MeV energies, similar to most high-luminosity gamma-ray blazars. The measured spectral characteristics are discussed in the framework of gravitational lensing effects.
关键词X-rays : individual
学科领域Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
DOI10.1086/589498
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语种英语
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000258296100034
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被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/237327
专题院士
粒子天体物理中心
作者单位中国科学院高能物理研究所
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Zhang S,Chen YP,Li TB,et al. High-energy properties of PKS 1830-211[J]. ASTROPHYSICAL JOURNAL,2008,683(1):400-408.
APA 张澍.,陈玉鹏.,李惕碚.,王建民.,Zhang, S.,...&Wang, JM.(2008).High-energy properties of PKS 1830-211.ASTROPHYSICAL JOURNAL,683(1),400-408.
MLA 张澍,et al."High-energy properties of PKS 1830-211".ASTROPHYSICAL JOURNAL 683.1(2008):400-408.
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