Characterizing Optical Variability of OJ 287 in 2016-2017
文献类型：期刊论文
| 作者 | Gupta, Alok C.1,2; Gaur, Haritma1; Wiita, Paul J.3; Pandey, A.1; Kushwaha, P.4; Hu, S. M.5; Kurtanidze, O. M.6,7,8,9; Semkov, E.10,11; Damljanovic, G.12; Goyal, A.13 |
| 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 |
| 通讯作者 | Gupta, Alok C.(acgupta30@gmail.com) |
| 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. |
| WOS关键词 | ACTIVE GALACTIC NUCLEUS ; INTRADAY VARIABILITY ; BL LACERTAE ; BLACK-HOLE ; SPECTRAL VARIABILITY ; RELATIVISTIC JETS ; RADIO OUTBURSTS ; BLAZARS ; MULTIWAVELENGTH ; POLARIZATION |
| 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://libir.pmo.ac.cn/handle/332002/18757]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Gupta, Alok C. |
| 作者单位 | 1.Aryabhatta Res Inst Observat Sci ARIES, Naini Tal 263002, India 2.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai Astron Observ, Shanghai 200030, Peoples R China 3.Coll New Jersey, Dept Phys, 2000 Pennington Rd, Ewing, NJ 08628 USA 4.Univ Sao Paulo, Dept Astron, IAG USP, BR-05508090 Sao Paulo, Brazil 5.Shandong Univ, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Inst Space Sci, Weihai 264209, Peoples R China 6.Abastumani Observ, GE-0301 Mt Kanobili, Abastumani, Rep of Georgia 7.Kazan Fed Univ, Engelhardt Astron Observ, Tatarstan, Russia 8.Guangzhou Univ, Ctr Astrophys, Guangzhou 510006, Guangdong, Peoples R China 9.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China 10.Bulgarian Acad Sci, Inst Astron, 72 Tsarigradsko Shosse Blvd, Sofia 1784, Bulgaria |
| 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：紫金山天文台
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