Optical variability of BL Lacertae during the major outburst of 1997

	Optical variability of BL Lacertae during the major outburst of 1997
	Ghosh, KK 1,2,3; Ramsey, BD 1; Sadun, AC 4; Soundararajaperumal, S 2; Wang JC(王建成)5
刊名	ASTROPHYSICAL JOURNAL
	2000-07-10
卷号	537 期号:2 页码:638-643
关键词	BL Lacertae objects : individual (BL Lacertae) galaxies : active galaxies : nuclei
ISSN号	0004-637X
通讯作者	Ghosh, KK
产权排序	第五完成单位
英文摘要	We have undertaken an investigation of recent flux variability in BL Lac. We present optical observations taken over 22 nights documenting major as well. as minor outbursts. This has been combined, for purposes of multifrequency analysis, with published X-ray and gamma-ray data taken for an additional single night. On two nights in particular, including the night of the X-ray observations, a major outburst of about a full magnitude of variation was recorded All the data have been analyzed with theoretical models. Attempts were made to use synchrotron self-Compton and external Comptonization models to explain the data; however, both classes of models were found lacking. More satisfactory results were obtained using an analytical model proposed by Wang et al. that involves the evolution of synchrotron spectra in a homogeneous jet due to the injection of relativistic electrons, taking into account radiation losses during the outbursts. It is hoped that the results of this study of BL Lac, an archetype for the class of blazars in general, represent a more generic phenomenon applicable to the entire class.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	GAMMA-RAY ; INFRARED POLARIMETRY ; STELLAR PHOTOMETRY ; OBJECTS ; BLAZARS ; MICROVARIABILITY ; POLARIZATION ; EMISSION ; QUASARS ; FLARE
收录类别	SCI
原文出处	http://iopscience.iop.org/0004-637X/537/2/638/
语种	英语
WOS记录号	WOS:000088451100010
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4932]
专题	云南天文台_高能天体物理研究组
作者单位	1.Postal address: NASA/Marshall Space Flight Center, Space Science Department, SD50, Huntsville, AL 35812 2.Indian Institute of Astrophysics, Bangalore 560 034, India 3.NAS/NRC Research Associate; on leave from the Indian Institute of Astrophysics, India 4.University of Colorado at Denver, Department of Physics, Campus Box 157, P.O. Box 173364, Denver, CO 80217-3364 5.Yunnan Observatory, Chinese Academy of Sciences, China
推荐引用方式 GB/T 7714	Ghosh, KK,Ramsey, BD,Sadun, AC,et al. Optical variability of BL Lacertae during the major outburst of 1997[J]. ASTROPHYSICAL JOURNAL,2000,537(2):638-643.
APA	Ghosh, KK,Ramsey, BD,Sadun, AC,Soundararajaperumal, S,&Wang JC.(2000).Optical variability of BL Lacertae during the major outburst of 1997.ASTROPHYSICAL JOURNAL,537(2),638-643.
MLA	Ghosh, KK,et al."Optical variability of BL Lacertae during the major outburst of 1997".ASTROPHYSICAL JOURNAL 537.2(2000):638-643.