COMPTEL observations of the gamma-ray blazar PKS 1622-297

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	COMPTEL observations of the gamma-ray blazar PKS 1622-297
	Zhang S(张澍); Zhang, S; Collmar, W; Bennett, K; Bloemen, H; Hermsen, W; McConnell, M; Reimer, O; Schonfelder, V; Wagner, SJ
刊名	ASTRONOMY & ASTROPHYSICS
	2002
卷号	386 期号:3 页码:843-853
关键词	gamma rays : observations galaxies : active galaxies : quasars : individual : PKS 1622-297
通讯作者	Max Planck Inst Extraterr Phys, D-85740 Garching, Germany ; SRON, Natl Inst Space Res, NL-3584 CA Utrecht, Netherlands ; Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA ; European Space Agcy, Dept Space Sci, Div Astrophys, ESTEC, NL-2200 AG Noordwijk, Netherlands ; NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA ; Inst High Energy Phys, Lab Cosm Ray & High Energy Astrophys, Beijing 100039, Peoples R China ; Landessternwarte Heidelberg, D-69117 Heidelberg, Germany
英文摘要	We report results of observations and analyses on the gamma-ray blazar PKS 1622-297, with emphasis on the COMPTEL data (0.75-30 MeV) collected between April 1991 and November 1997. PKS 1622-297 was detected as a source of gamma-rays by the EGRET experiment aboard CGRO in 1995 during a gamma-ray outburst at energies above 100 MeV lasting for five weeks. In this time period the blazar was significantly (similar to 5.9 sigma) detected by COMPTEL at 10{30 MeV. At lower COMPTEL energies the detection is marginal, resulting in a hard MeV spectrum. The combined COMPTEL/EGRET energy spectrum shows a break at MeV energies. The broad-band spectrum (radio {-gamma-rays) shows that the gamma-ray emission dominates the overall power output. On top of the 5-week gamma-ray outburst, EGRET detected a huge are lasting for >1 day. Enhanced MeV emission (10-30 MeV) is found near the time of this are, suggesting a possible time delay with respect to the emission above 100 MeV. Outside the 5-week flaring period in 1995, we do not detect MeV emission from PKS 1622-297.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
原文出处	SCI
语种	英语
WOS记录号	WOS:000175269800009
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/238591]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Zhang S,Zhang, S,Collmar, W,et al. COMPTEL observations of the gamma-ray blazar PKS 1622-297[J]. ASTRONOMY & ASTROPHYSICS,2002,386(3):843-853.
APA	张澍.,Zhang, S.,Collmar, W.,Bennett, K.,Bloemen, H.,...&Williams, OR.(2002).COMPTEL observations of the gamma-ray blazar PKS 1622-297.ASTRONOMY & ASTROPHYSICS,386(3),843-853.
MLA	张澍,et al."COMPTEL observations of the gamma-ray blazar PKS 1622-297".ASTRONOMY & ASTROPHYSICS 386.3(2002):843-853.