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Long-term multi-wavelength variability and correlation study of Markarian 421 from 2007 to 2009

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dc.contributor.author Ahnen M.
dc.contributor.author Ansoldi S.
dc.contributor.author Antonelli L.
dc.contributor.author Antoranz P.
dc.contributor.author Babic A.
dc.contributor.author Banerjee B.
dc.contributor.author Bangale P.
dc.contributor.author Barres De Almeida U.
dc.contributor.author Barrio J.
dc.contributor.author Becerra González J.
dc.contributor.author Bednarek W.
dc.contributor.author Bernardini E.
dc.contributor.author Biasuzzi B.
dc.contributor.author Biland A.
dc.contributor.author Blanch O.
dc.contributor.author Bonnefoy S.
dc.contributor.author Bonnoli G.
dc.contributor.author Borracci F.
dc.contributor.author Bretz T.
dc.contributor.author Buson S.
dc.contributor.author Carosi A.
dc.contributor.author Chatterjee A.
dc.contributor.author Clavero R.
dc.contributor.author Colin P.
dc.contributor.author Colombo E.
dc.contributor.author Contreras J.
dc.contributor.author Cortina J.
dc.contributor.author Covino S.
dc.contributor.author Da Vela P.
dc.contributor.author Dazzi F.
dc.contributor.author De Angelis A.
dc.contributor.author De Lotto B.
dc.contributor.author De Oña Wilhelmi E.
dc.contributor.author Di Pierro F.
dc.contributor.author Domínguez A.
dc.contributor.author Dominis Prester D.
dc.contributor.author Dorner D.
dc.contributor.author Doro M.
dc.contributor.author Einecke S.
dc.contributor.author Eisenacher Glawion D.
dc.contributor.author Elsaesser D.
dc.contributor.author Fernández-Barral A.
dc.contributor.author Fidalgo D.
dc.contributor.author Fonseca M.
dc.contributor.author Font L.
dc.contributor.author Frantzen K.
dc.contributor.author Fruck C.
dc.contributor.author Galindo D.
dc.contributor.author García López R.
dc.contributor.author Garczarczyk M.
dc.contributor.author Garrido Terrats D.
dc.contributor.author Gaug M.
dc.contributor.author Giammaria P.
dc.contributor.author Godinović N.
dc.contributor.author González Muñoz A.
dc.contributor.author Gora D.
dc.contributor.author Guberman D.
dc.contributor.author Hadasch D.
dc.contributor.author Hahn A.
dc.contributor.author Hanabata Y.
dc.contributor.author Hayashida M.
dc.contributor.author Herrera J.
dc.contributor.author Hose J.
dc.contributor.author Hrupec D.
dc.contributor.author Hughes G.
dc.contributor.author Idec W.
dc.contributor.author Kodani K.
dc.contributor.author Konno Y.
dc.contributor.author Kubo H.
dc.contributor.author Kushida J.
dc.contributor.author La Barbera A.
dc.contributor.author Lelas D.
dc.contributor.author Lindfors E.
dc.contributor.author Lombardi S.
dc.contributor.author Longo F.
dc.contributor.author López M.
dc.contributor.author López-Coto R.
dc.contributor.author Majumdar P.
dc.contributor.author Makariev M.
dc.contributor.author Mallot K.
dc.contributor.author Maneva G.
dc.contributor.author Manganaro M.
dc.contributor.author Mannheim K.
dc.contributor.author Maraschi L.
dc.contributor.author Marcote B.
dc.contributor.author Mariotti M.
dc.contributor.author Martínez M.
dc.contributor.author Mazin D.
dc.contributor.author Menzel U.
dc.contributor.author Miranda J.
dc.contributor.author Mirzoyan R.
dc.contributor.author Moralejo A.
dc.contributor.author Moretti E.
dc.contributor.author Nakajima D.
dc.contributor.author Neustroev V.
dc.date.accessioned 2018-09-19T20:05:01Z
dc.date.available 2018-09-19T20:05:01Z
dc.date.issued 2016
dc.identifier.issn 0004-6361
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/142528
dc.description.abstract © ESO 2016.Aims. We study the multi-band variability and correlations of the TeV blazar Mrk 421 on year timescales, which can bring additional insight on the processes responsible for its broadband emission. Methods.We observed Mrk 421 in the very high energy (VHE) -ray range with the Cherenkov telescopeMAGIC-I from March 2007 to June 2009 for a total of 96 h of effective time after quality cuts. The VHE flux variability is quantified using several methods, including the Bayesian Block algorithm, which is applied to data from Cherenkov telescopes here for the first time. The 2.3 yr long MAGIC light curve is complemented with data from the Swift/BAT and RXTE/ASM satellites and the KVA, GASP-WEBT, OVRO, and Metshovi telescopes from February 2007 to July 2009, allowing for an excellent characterisation of the multi-band variability and correlations over year timescales. Results. Mrk 421 was found in different -ray emission states during the 2.3 yr long observation period: The flux above 400 GeV spans from the minimum nightly value of (1:30:4)1011 cm2 s1 to the maximum flux, that is about 24 times higher, at (3:10:1)1010 cm2 s1. Flares and different levels of variability in the -ray light curve could be identified with the Bayesian Block algorithm. The same behaviour of a quiet and active emission was found in the X-ray light curves measured by Swift/BAT and the RXTE/ASM, with a direct correlation in time. The behaviour of the optical light curve of GASP-WEBT and the radio light curves by OVRO and Metshovi are different as they show no coincident features with the higher energetic light curves and a less variable emission. Overall, the fractional variability increases with energy. The comparable variability in the X-ray and VHE bands and their direct correlation during both high- and low-activity periods spanning many months show that the electron populations radiating the X-ray and -ray photons are either the same, as expected in the synchrotron-self-Compton mechanism, or at least strongly correlated, as expected in electromagnetic cascades.
dc.relation.ispartofseries Astronomy and Astrophysics
dc.subject Astroparticle physics
dc.subject BL Lacertae objects: individual: Markarian 421
dc.subject Radiation mechanisms: non-thermal
dc.title Long-term multi-wavelength variability and correlation study of Markarian 421 from 2007 to 2009
dc.type Article
dc.relation.ispartofseries-volume 593
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS00046361-2016-593-SID84989907748


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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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