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dc.contributor.authorRebillot, P. F.
dc.contributor.authorBadran, H. M.
dc.contributor.authorBlaylock, G.
dc.contributor.authorBradbury, S. M.
dc.contributor.authorBuckley, J. H.
dc.contributor.authorCarter‐Lewis, D. A.
dc.contributor.authorCelik, O.
dc.contributor.authorChow, Y. C.
dc.contributor.authorCogan, P.
dc.contributor.authorCui, W.
dc.contributor.authorDaniel, M.
dc.contributor.authorDuke, C.
dc.contributor.authorFalcone, A.
dc.contributor.authorFegan, S. J.
dc.contributor.authorFinley, J. P.
dc.contributor.authorFortson, L. F.
dc.contributor.authorGillanders, G. H.
dc.contributor.authorGrube, J.
dc.contributor.authorGutierrez, K.
dc.contributor.authorGyuk, G.
dc.contributor.authorHanna, D.
dc.contributor.authorHolder, J.
dc.contributor.authorHoran, D.
dc.contributor.authorHughes, S. B.
dc.contributor.authorKenny, G. E.
dc.contributor.authorKertzman, M.
dc.contributor.authorKieda, D.
dc.contributor.authorKildea, J.
dc.contributor.authorKosack, K.
dc.contributor.authorKrawczynski, H.
dc.contributor.authorKrennrich, F.
dc.contributor.authorLang, M. J.
dc.contributor.authorLe Bohec, S.
dc.contributor.authorLinton, E.
dc.contributor.authorMaier, G.
dc.contributor.authorMoriarty, P.
dc.contributor.authorPerkins, J.
dc.contributor.authorPohl, M.
dc.contributor.authorQuinn, J.
dc.contributor.authorRagan, K.
dc.contributor.authorReynolds, P. T.
dc.contributor.authorRose, H. J.
dc.contributor.authorSchroedter, M.
dc.contributor.authorSembroski, G. H.
dc.contributor.authorSteele, G.
dc.contributor.authorSwordy, S. P.
dc.contributor.authorValcarcel, L.
dc.contributor.authorVassiliev, V. V.
dc.contributor.authorWakely, S. P.
dc.contributor.authorWeekes, T. C.
dc.contributor.authorZweerink, J.
dc.contributor.authorVERITAS Collaboration), (The
dc.contributor.authorAller, M.
dc.contributor.authorAller, H.
dc.contributor.authorBoltwood, P.
dc.contributor.authorJung, I.
dc.contributor.authorKranich, D.
dc.contributor.authorNilsson, K.
dc.contributor.authorPasanen, M.
dc.contributor.authorSadun, A.
dc.contributor.authorSillanpaa, A.
dc.date.accessioned2018-08-24T08:26:14Z
dc.date.available2018-08-24T08:26:14Z
dc.date.issued2006-04-20
dc.identifier.citationRebillot, P. F. Badran, H. M.; Blaylock, G.; Bradbury, S. M.; Buckley, J. H.; Carter‐Lewis, D. A.; Celik, O.; Chow, Y. C.; Cogan, P.; Cui, W.; Daniel, M.; Duke, C.; Falcone, A.; Fegan, S. J.; Finley, J. P.; Fortson, L. F.; Gillanders, G. H.; Grube, J.; Gutierrez, K.; Gyuk, G.; Hanna, D.; Holder, J.; Horan, D.; Hughes, S. B.; Kenny, G. E.; Kertzman, M.; Kieda, D.; Kildea, J.; Kosack, K.; Krawczynski, H.; Krennrich, F.; Lang, M. J.; Le Bohec, S.; Linton, E.; Maier, G.; Moriarty, P.; Perkins, J.; Pohl, M.; Quinn, J.; Ragan, K.; Reynolds, P. T.; Rose, H. J.; Schroedter, M.; Sembroski, G. H.; Steele, G.; Swordy, S. P.; Valcarcel, L.; Vassiliev, V. V.; Wakely, S. P.; Weekes, T. C.; Zweerink, J.; VERITAS Collaboration), (The; Aller, M.; Aller, H.; Boltwood, P.; Jung, I.; Kranich, D.; Nilsson, K.; Pasanen, M.; Sadun, A.; Sillanpaa, A. (2006). Multiwavelength observations of the blazar markarian 421 in 2002 december and 2003 january. The Astrophysical Journal 641 (2), 740-751
dc.identifier.issn0004-637X,1538-4357
dc.identifier.urihttp://hdl.handle.net/10379/9801
dc.description.abstractWe report on a multiwavelength campaign on the TeV gamma-ray blazar Mrk 421 performed during 2002 December and 2003 January. These target of opportunity observations were initiated by the detection of X-ray and TeV gamma-ray flares with the All Sky Monitor (ASM) on board the Rossi X-Ray Timing Explorer (RXTE) and the 10 m Whipple gamma-ray telescope. The campaign included observational coverage in the radio (University of Michigan Radio Astronomy Observatory), optical (Boltwood, La Palma KVA 0.6 m; WIYN 0.9 m), X-ray (RXTE pointed telescopes), and TeV gamma-ray (Whipple and HEGRA) bands. At TeV energies, the observations revealed several flares at intermediate flux levels, peaking between 1 and 1.5 times the flux from the Crab Nebula. While the time-averaged spectrum can be fitted with a single power law of photon index Gamma = 2.8 from dN gamma/dE proportional to E-Gamma, we find some evidence for spectral variability. Confirming earlier results, the campaign reveals a rather loose correlation between the X-ray and TeV gamma-ray fluxes. In one case, a very strong X-ray flare is not accompanied by a comparable TeV gamma-ray flare. Although the source flux was variable in the optical and radio bands, the sparse sampling of the optical and radio light curves does not allow us to study the correlation properties in detail. We present a simple analysis of the data with a synchrotron self-Compton model, emphasizing that models with very high Doppler factors and low magnetic fields can describe the data.
dc.publisherIOP Publishing
dc.relation.ispartofThe Astrophysical Journal
dc.subjectbl lacertae objects : individual (mrk 421)
dc.subjectgalaxies : jets
dc.subjectgamma rays : observations radiation
dc.subjectmechanisms : nonthermal
dc.subjectx-rays : individual (mrk 421)
dc.subjecttev gamma-rays
dc.subjectactive galactic nuclei
dc.subjectbl-lacertae objects
dc.subjectself-compton model
dc.subjectx-ray
dc.subjectspectral evolution
dc.subjectlac objects
dc.subjectstrong flares
dc.subjectcrab-nebula
dc.subjectmkn 501
dc.titleMultiwavelength observations of the blazar markarian 421 in 2002 december and 2003 january
dc.typeArticle
dc.identifier.doi10.1086/500653
dc.local.publishedsourcehttp://iopscience.iop.org/article/10.1086/500653/pdf
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