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The complex variability of blazars: Time-scales and periodicity analysis in S4 0954+65

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dc.contributor.author Raiteri C.M.
dc.contributor.author Villata M.
dc.contributor.author Larionov V.M.
dc.contributor.author Jorstad S.G.
dc.contributor.author Marscher A.P.
dc.contributor.author Weaver Z.R.
dc.contributor.author Acosta-Pulido J.A.
dc.contributor.author Agudo I.
dc.contributor.author Andreeva T.
dc.contributor.author Arkharov A.
dc.contributor.author Bachev R.
dc.contributor.author Benítez E.
dc.contributor.author Berton M.
dc.contributor.author Björklund I.
dc.contributor.author Borman G.A.
dc.contributor.author Bozhilov V.
dc.contributor.author Carnerero M.I.
dc.contributor.author Carosati D.
dc.contributor.author Casadio C.
dc.contributor.author Chen W.P.
dc.contributor.author Damljanovic G.
dc.contributor.author D'Ammando F.
dc.contributor.author Escudero J.
dc.contributor.author Fuentes A.
dc.contributor.author Giroletti M.
dc.contributor.author Grishina T.S.
dc.contributor.author Gupta A.C.
dc.contributor.author Hagen-Thorn V.A.
dc.contributor.author Hart M.
dc.contributor.author Hiriart D.
dc.contributor.author Hou W.J.
dc.contributor.author Ivanov D.
dc.contributor.author Kim J.Y.
dc.contributor.author Kimeridze G.N.
dc.contributor.author Konstantopoulou C.
dc.contributor.author Kopatskaya E.N.
dc.contributor.author Kurtanidze O.M.
dc.contributor.author Kurtanidze S.O.
dc.contributor.author Lähteenmäki A.
dc.contributor.author Larionova E.G.
dc.contributor.author Larionova L.V.
dc.contributor.author Marchili N.
dc.contributor.author Markovic G.
dc.contributor.author Minev M.
dc.contributor.author Morozova D.A.
dc.contributor.author Myserlis I.
dc.contributor.author Nakamura M.
dc.contributor.author Nikiforova A.A.
dc.contributor.author Nikolashvili M.G.
dc.contributor.author Otero-Santos J.
dc.contributor.author Ovcharov E.
dc.contributor.author Pursimo T.
dc.contributor.author Rahimov I.
dc.contributor.author Righini S.
dc.contributor.author Sakamoto T.
dc.contributor.author Savchenko S.S.
dc.contributor.author Semkov E.H.
dc.contributor.author Shakhovskoy D.
dc.contributor.author Sigua L.A.
dc.contributor.author Stojanovic M.
dc.contributor.author Strigachev A.
dc.contributor.author Thum C.
dc.contributor.author Tornikoski M.
dc.contributor.author Traianou E.
dc.contributor.author Troitskaya Y.V.
dc.contributor.author Troitskiy I.S.
dc.contributor.author Tsai A.
dc.contributor.author Valcheva A.
dc.contributor.author Vasilyev A.A.
dc.contributor.author Vince O.
dc.contributor.author Zaharieva E.
dc.date.accessioned 2022-02-09T20:31:58Z
dc.date.available 2022-02-09T20:31:58Z
dc.date.issued 2021
dc.identifier.issn 0035-8711
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/168804
dc.description.abstract Among active galactic nuclei, blazars show extreme variability properties. We here investigate the case of the BL Lac object S4 0954+65 with data acquired in 2019-2020 by the Transiting Exoplanet Survey Satellite (TESS) and by the Whole Earth Blazar Telescope (WEBT) Collaboration. The 2-min cadence optical light curves provided by TESS during three observing sectors of nearly 1 month each allow us to study the fast variability in great detail. We identify several characteristic short-term time-scales, ranging from a few hours to a few days. However, these are not persistent, as they differ in the various TESS sectors. The long-term photometric and polarimetric optical and radio monitoring undertaken by the WEBT brings significant additional information, revealing that (i) in the optical, long-term flux changes are almost achromatic, while the short-term ones are strongly chromatic; (ii) the radio flux variations at 37 GHz follow those in the optical with a delay of about 3 weeks; (iii) the range of variation of the polarization degree and angle is much larger in the optical than in the radio band, but the mean polarization angles are similar; (iv) the optical long-term variability is characterized by a quasi-periodicity of about 1 month. We explain the source behaviour in terms of a rotating inhomogeneous helical jet, whose pitch angle can change in time.
dc.relation.ispartofseries Monthly Notices of the Royal Astronomical Society
dc.subject BL Lacertae objects: general
dc.subject BL Lacertae objects: individual: S4 0954+65
dc.subject Galaxies: active
dc.subject Galaxies: jets
dc.title The complex variability of blazars: Time-scales and periodicity analysis in S4 0954+65
dc.type Article
dc.relation.ispartofseries-issue 4
dc.relation.ispartofseries-volume 504
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 5629
dc.source.id SCOPUS00358711-2021-504-4-SID85108587265


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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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