Characterizing Optical Variability of OJ 287 in 2016-2017
文献类型：期刊论文
| 作者 | Gupta, Alok C.3,4; Gaur, Haritma3; Wiita, Paul J.1; Pandey, A.3; Kushwaha, P.5; Hu, S. M.6; Kurtanidze, O. M.7,8,9,10; Semkov, E.11,12; Damljanovic, G.13; Goyal, A.14 |
| 刊名 | ASTRONOMICAL JOURNAL
 |
| 出版日期 | 2019-03-01 |
| 卷号 | 157期号:3页码:12 |
| ISSN号 | 0004-6256 |
| 关键词 | BL Lacertae objects: general BL Lacertae objects: individual (OJ 287) techniques: photometric techniques: polarimetric |
| DOI | 10.3847/1538-3881/aafe7d |
| 英文摘要 | We report on a recent multiband optical photometric and polarimetric observational campaign of the blazar OJ 287 that was carried out during 2016 September-2017 December. We employed nine telescopes in Bulgaria, China, Georgia, Japan, Serbia, Spain, and the United States. We collected over 1800 photometric image frames in BVRI bands and over 100 polarimetric measurements over similar to 175 nights. In 11 nights with many quasi-simultaneous multiband (V, R, I) observations, we did not detect any genuine intraday variability in flux or color. On longer timescales, multiple flaring events were seen. Large changes in color with respect to time and in a color-magnitude diagram were seen, and while only a weak systematic variability trend was noticed in color with respect to time, the color-magnitude diagram shows a bluer-when-brighter trend. Large changes in the degree of polarization and substantial swings in the polarization angle were detected. The fractional Stokes parameters of the polarization showed a systematic trend with time in the beginning of these observations, followed by chaotic changes and then an apparently systematic variation at the end. These polarization changes coincide with the detection and duration of the source at very high energies as seen by VERITAS. The spectral index shows a systematic variation with time and V-band magnitude. We briefly discuss possible physical mechanisms that could explain the observed flux, color, polarization, and spectral variability. |
| 资助项目 | Fermi Guest Investigator grants[NNX08AW56G] ; Fermi Guest Investigator grants[NNX09AU10G] ; Fermi Guest Investigator grants[NNX12AO93G] ; Fermi Guest Investigator grants[NNX15AU81G] ; Indo-Poland project - Department of Science and Technology (DST), Government of India[DST/INT/POL/P19/2016] ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI)[2016VMB073] ; Department of Science & Technology, India, through INSPIRE faculty award at ARIES, Nainital[IFA17-PH197] ; FAPESP[2015/13933-0] ; Shota Rustaveli National Science Foundation[FR/217554/16] ; China NSF[NSFC11733001] ; China NSF[NSFCU1531245] ; National Natural Science Foundation of China[11873035] ; Natural Science Foundation of Shandong province[JQ201702] ; Young Scholars Program of Shandong University, Weihai[20820162003] ; Bulgarian National Science Fund of the Ministry of Education and Science[DN 08-1/2016] ; Bulgarian National Science Fund of the Ministry of Education and Science[DN 18-13/2017] ; Institute of Astronomy and NAO Rozhen, BAS ; Ministry of Education, Science and Technological Development of the Republic of Serbia[176011] ; Ministry of Education, Science and Technological Development of the Republic of Serbia[176004] ; Ministry of Education, Science and Technological Development of the Republic of Serbia[176021] ; Polish National Science Centre (NCN)[2012/04/A/ST9/00083] ; Polish NSC grant[UMO-2016/22/E/ST9/00061] ; National Science Foundation of China[11473054] ; National Science Foundation of China[U1531245] ; CAS Hundred-Talented program[Y787081009] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000457852600001 |
| 源URL | [http://119.78.226.72/handle/331011/31951]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Gupta, Alok C. |
| 作者单位 | 1.Coll New Jersey, Dept Phys, 2000 Pennington Rd, Ewing, NJ 08628 USA 2.Tokyo Inst Technol, Dept Phys, Meguro Ku, 2-12-1 Ookayama, Tokyo 1528551, Japan 3.Aryabhatta Res Inst Observat Sci ARIES, Naini Tal 263002, India 4.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai Astron Observ, Shanghai 200030, Peoples R China 5.Univ Sao Paulo, Dept Astron, IAG USP, BR-05508090 Sao Paulo, Brazil 6.Shandong Univ, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Inst Space Sci, Weihai 264209, Peoples R China 7.Abastumani Observ, GE-0301 Mt Kanobili, Abastumani, Rep of Georgia 8.Kazan Fed Univ, Engelhardt Astron Observ, Tatarstan, Russia 9.Guangzhou Univ, Ctr Astrophys, Guangzhou 510006, Guangdong, Peoples R China 10.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gupta, Alok C.,Gaur, Haritma,Wiita, Paul J.,et al. Characterizing Optical Variability of OJ 287 in 2016-2017[J]. ASTRONOMICAL JOURNAL,2019,157(3):12. |
| APA | Gupta, Alok C..,Gaur, Haritma.,Wiita, Paul J..,Pandey, A..,Kushwaha, P..,...&Strigachev, A..(2019).Characterizing Optical Variability of OJ 287 in 2016-2017.ASTRONOMICAL JOURNAL,157(3),12. |
| MLA | Gupta, Alok C.,et al."Characterizing Optical Variability of OJ 287 in 2016-2017".ASTRONOMICAL JOURNAL 157.3(2019):12. |
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来源：上海天文台
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