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Characterizing Optical Variability of OJ 287 in 2016-2017

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dc.contributor.author Gupta A.
dc.contributor.author Gaur H.
dc.contributor.author Wiita P.
dc.contributor.author Pandey A.
dc.contributor.author Kushwaha P.
dc.contributor.author Hu S.
dc.contributor.author Kurtanidze O.
dc.contributor.author Semkov E.
dc.contributor.author Damljanovic G.
dc.contributor.author Goyal A.
dc.contributor.author Uemura M.
dc.contributor.author Darriba A.
dc.contributor.author Chen X.
dc.contributor.author Vince O.
dc.contributor.author Gu M.
dc.contributor.author Zhang Z.
dc.contributor.author Bachev R.
dc.contributor.author Chanishvili R.
dc.contributor.author Itoh R.
dc.contributor.author Kawabata M.
dc.contributor.author Kurtanidze S.
dc.contributor.author Nakaoka T.
dc.contributor.author Nikolashvili M.
dc.contributor.author Stawarz
dc.contributor.author Strigachev A.
dc.date.accessioned 2020-01-15T20:52:11Z
dc.date.available 2020-01-15T20:52:11Z
dc.date.issued 2019
dc.identifier.issn 0004-6256
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/155456
dc.description.abstract © 2019. The American Astronomical Society. All rights reserved.. 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 ∼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.
dc.relation.ispartofseries Astronomical Journal
dc.subject BL Lacertae objects: general
dc.subject BL Lacertae objects: individual (OJ 287)
dc.subject techniques: photometric
dc.subject techniques: polarimetric
dc.title Characterizing Optical Variability of OJ 287 in 2016-2017
dc.type Article
dc.relation.ispartofseries-issue 3
dc.relation.ispartofseries-volume 157
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS00046256-2019-157-3-SID85063527729


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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