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Optical intra-day variability in blazars
A. C. Gupta1; Fan, JH2; Bai JM(白金明)1; Wagner, SJ3; Gupta, AC (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Yunnan, Peoples R China.
Source PublicationASTRONOMICAL JOURNAL
2008-04
Volume135Issue:4Pages:1384-1394
DOI10.1088/0004-6256/135/4/1384
Contribution Rank第1完成单位
Indexed BySCI
KeywordGalaxies : Active Quasars : General
AbstractWe selected a sample of a dozen blazars which are the prime candidates for simultaneous multi-wavelength observing campaigns in their outburst phase. We searched for optical outbursts, intra-day variability (IDV) and short-term variability in these blazars. We carried out optical photometric monitoring of nine of these blazars in 13 observing nights during our observing run of 2006 October 27-2007 March 20 using the 1.02 m optical telescope equipped with CCD detector and BVRI Johnson broadband filters at Yunnan Astronomical Observatory, Kunming, China. From our observations, our data favor the hypothesis that three blazars, AO 0235+164, S5 0716+714, and 3C 279, were in the outburst state; one blazar, 3C 454.3, was in the post-outburst state; three blazars, S2 0109+224, PKS 0735+178, and OJ 287, were in the pre/post-outburst state; one blazar, ON 231, was in the low state; and the state of one blazar, 1ES 2344+514, was not known because there are not many optical data available for the blazar to compare with our observations. We observed densely sampled 1534 image frames of these nine blazars. Out of three nights of observations of AO 0235+164, IDV was detected in two nights. Out of five nights of observations of S5 0716+714, IDV was detected in two nights. In one night of observations of PKS0735+178, IDV was detected. Out of six nights of observations of 3C 454.3, IDV was detected in three nights. No IDV was detected in S2 0109+224, OJ 287, ON 231, 3C 279, and 1ES 2344+514 in their one, four, one, two, and one nights of observations, respectively. AO 0235+164, S5 0716+714, OJ 287, 3C 279, and 3C 454.3 were observed in more than one night and short-term variations in all these blazars were also noticed. From our observations and the available data, we found that the predicted optical outbursts with time intervals of similar to 8 years in AO 0235+164 and similar to 3 years in S5 0716+714 have possibly occurred.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6256
URL查看原文
Archive Date2009-05-26
WOS IDWOS:000254655300023
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordBL-LACERTAE OBJECTS ; ACTIVE GALACTIC NUCLEI ; RAY-LOUD BLAZARS ; UBVRI PHOTOPOLARIMETRIC OBSERVATIONS ; SUPERMASSIVE BLACK-HOLES ; XMM-NEWTON OBSERVATIONS ; LONG-TERM VARIABILITY ; RADIO-SOURCES ; LAC OBJECTS ; S5 0716+714
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Cited Times:72[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/7040
Collection星系研究组
Corresponding AuthorGupta, AC (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Yunnan, Peoples R China.
Affiliation1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming, Yunnan 650011, China
2.Center for Astrophysics, Guangzhou University, Guangzhou 510006, China
3.Landessternwarte, Königstuhl 12, D-69117, Heidelberg, Germany
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
A. C. Gupta,Fan, JH,Bai JM,et al. Optical intra-day variability in blazars[J]. ASTRONOMICAL JOURNAL,2008,135(4):1384-1394.
APA A. C. Gupta,Fan, JH,Bai JM,Wagner, SJ,&Gupta, AC .(2008).Optical intra-day variability in blazars.ASTRONOMICAL JOURNAL,135(4),1384-1394.
MLA A. C. Gupta,et al."Optical intra-day variability in blazars".ASTRONOMICAL JOURNAL 135.4(2008):1384-1394.
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