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Historic light curve and long-term optical variation of BL Lacertae 2200+420
Fan, JH1,2; Xie GZ(谢光中)3; Pecontal, E1; Pecontal, A1; Copin, Y1
发表期刊ASTROPHYSICAL JOURNAL
1998-11-01
卷号507期号:1页码:173-178
DOI10.1086/306301
产权排序第4完成单位
收录类别SCI
关键词Bl Lacertae Objects : Individual (2200+420)
摘要In this paper, historical optical (UBVRI) data and newly observed data from the Yunnan Observatory of China (over similar to 100 yr) are presented for BL Lacertae. Large variations of Delta U = 5.12 mag, Delta B = 5.31 mag, Delta V = 4.73 mag, Delta R = 2.59 mag, and Delta I = 2.54 mag, and color indices of U-B = -0.11 +/- 0.20, B-V = 1.0 +/- 0.11, V - R = 0.73 +/- 0.19, V - I = 1.42 +/- 0.25, R - I = 0.82 +/- 0.11, and B - I = 2.44 +/- 0.29 have been obtained from the literature. The Jurkevich method is used to investigate the existence of periods in the B-band light curve, and a long-term period of 14 yr is found. The 0.6 and 0.88 yr periods reported by Webb et al. are confirmed. In addition, a close relation between B - I and B is found, suggesting that the spectrum flattens when the source brightens.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
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WOS记录号WOS:000077779400016
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]0.35-3.5 MICRON PHOTOMETRY ; ACTIVE GALACTIC NUCLEI ; MULTIFREQUENCY OBSERVATIONS ; BLAZAR OJ-287 ; 3C 345 ; OBJECTS ; VARIABILITY ; QUASARS ; LAC ; CONFIRMATION
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6871
专题星系研究组
通讯作者Fan, JH
作者单位1.Centre de Recherche Astronomique de Lyon, Observatoire de Lyon, 9 Avenue Charles André, 69 563 Saint-Genis-Laval Cedex, France
2.Center for Astrophysics, Guangzhou Normal University, Guangzhou 510400, China; and Joint Laboratory for Optical Astronomy, Chinese Academy of Sciences, China
3.Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China
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Fan, JH,Xie GZ,Pecontal, E,et al. Historic light curve and long-term optical variation of BL Lacertae 2200+420[J]. ASTROPHYSICAL JOURNAL,1998,507(1):173-178.
APA Fan, JH,Xie GZ,Pecontal, E,Pecontal, A,&Copin, Y.(1998).Historic light curve and long-term optical variation of BL Lacertae 2200+420.ASTROPHYSICAL JOURNAL,507(1),173-178.
MLA Fan, JH,et al."Historic light curve and long-term optical variation of BL Lacertae 2200+420".ASTROPHYSICAL JOURNAL 507.1(1998):173-178.
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