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Optical multiband observations of BL Lacertae during the outburst of 2005
Hu, Shao Ming; Wu, J. H.; Zhao, G.; Zhou, X.
2006-11-21
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号373期号:1页码:209-216
摘要The aim of our observations is to investigate the intranight variability properties and the spectral variability of BL Lacertae. 799 optical multiband observations were intensively made with the Beijing-Arizona-Taiwan-Connecticut (BATC) 60/90 cm Schmidt telescope during the outburst composed of two subsequent flares in 2005. The second flare, whose rising phase lasted at least 44 d, was observed with amplitudes of more than 1.1 mag in three BATC optical bands. In general, on intranight time-scale the amplitude of variability and the variation rate are larger at the shorter wavelength, and the variation rate is comparable in the rising and decaying phases within each band. A possible time-lag between the light curves in bands e and m, around 11.6 min, was obtained. Based on the analysis of the colour index variation with the source brightness, the variability of BL Lacertae can be interpreted as having two components: a 'strongly chromatic' intranight component and a 'mildly chromatic' internight component, which may be the results of both intrinsic physical mechanism and geometric effects.
关键词Bl Lacertae Objects : General Bl Lacertae Objects : Individual : Bl Lacertae Galaxies : Photometry
DOI10.1111/j.1365-2966.2006.10995.x
收录类别SCI
语种英语
WOS记录号WOS:000241891700038
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文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8124
专题光学天文研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Shandong Univ Weihai, Dept Space Sci & Appl Phys, Weihai 264209, Shandong, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
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Hu, Shao Ming,Wu, J. H.,Zhao, G.,et al. Optical multiband observations of BL Lacertae during the outburst of 2005[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2006,373(1):209-216.
APA Hu, Shao Ming,Wu, J. H.,Zhao, G.,&Zhou, X..(2006).Optical multiband observations of BL Lacertae during the outburst of 2005.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,373(1),209-216.
MLA Hu, Shao Ming,et al."Optical multiband observations of BL Lacertae during the outburst of 2005".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 373.1(2006):209-216.
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