Multiwavelength Observations of the Blazar BL Lacertae: A New Fast TeV Gamma-Ray Flare

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorAbeysekara, A. U.en_US
dc.contributor.authorBenbow, W.en_US
dc.contributor.authorBird, R.en_US
dc.contributor.authorBrantseg, T.en_US
dc.contributor.authorBrose, R.en_US
dc.contributor.authorBuchovecky, M.en_US
dc.contributor.authorBuckley, J. H.en_US
dc.contributor.authorBugaev, V.en_US
dc.contributor.authorConnolly, M. P.en_US
dc.contributor.authorCui, W.en_US
dc.contributor.authorDaniel, M. K.en_US
dc.contributor.authorFalcone, A.en_US
dc.contributor.authorFeng, Q.en_US
dc.contributor.authorFinley, J. P.en_US
dc.contributor.authorFortson, L.en_US
dc.contributor.authorFurniss, A.en_US
dc.contributor.authorGillanders, G. H.en_US
dc.contributor.authorGunawardhana, I.en_US
dc.contributor.authorHütten, M.en_US
dc.contributor.authorHanna, D.en_US
dc.contributor.authorHervet, O.en_US
dc.contributor.authorHolder, J.en_US
dc.contributor.authorHughes, G.en_US
dc.contributor.authorHumensky, T. B.en_US
dc.contributor.authorJohnson, C. A.en_US
dc.contributor.authorKaaret, P.en_US
dc.contributor.authorKar, P.en_US
dc.contributor.authorKertzman, M.en_US
dc.contributor.authorKrennrich, F.en_US
dc.contributor.authorLang, M. J.en_US
dc.contributor.authorLin, T. T.Y.en_US
dc.contributor.authorMcArthur, S.en_US
dc.contributor.authorMoriarty, P.en_US
dc.contributor.authorMukherjee, R.en_US
dc.contributor.authorO'Brien, S.en_US
dc.contributor.authorOng, R. A.en_US
dc.contributor.authorOtte, A. N.en_US
dc.contributor.authorPark, N.en_US
dc.contributor.authorPetrashyk, A.en_US
dc.contributor.authorPohl, Martinen_US
dc.contributor.authorPueschel, E.en_US
dc.contributor.authorQuinn, J.en_US
dc.contributor.authorRagan, K.en_US
dc.contributor.authorReynolds, P. T.en_US
dc.contributor.authorRichards, G. T.en_US
dc.contributor.authorRoache, E.en_US
dc.contributor.authorRulten, C.en_US
dc.contributor.authorSadeh, I.en_US
dc.contributor.authorSantander, M.en_US
dc.contributor.authorSembroski, G. H.en_US
dc.contributor.authorShahinyan, K.en_US
dc.contributor.authorWakely, S. P.en_US
dc.contributor.authorWeinstein, A.en_US
dc.contributor.authorWells, R. M.en_US
dc.contributor.authorWilcox, P.en_US
dc.contributor.authorWilliams, D. A.en_US
dc.contributor.authorZitzer, B.en_US
dc.contributor.authorJorstad, S. G.en_US
dc.contributor.authorMarscher, A. P.en_US
dc.contributor.authorLister, M. L.en_US
dc.contributor.authorKovalev, Y. Y.en_US
dc.contributor.authorPushkarev, A. B.en_US
dc.contributor.authorSavolainen, T.en_US
dc.contributor.authorAgudo, I.en_US
dc.contributor.authorMolina, S. N.en_US
dc.contributor.authorGómez, J. L.en_US
dc.contributor.authorLarionov, V. M.en_US
dc.contributor.authorBorman, G. A.en_US
dc.contributor.authorMokrushina, A. A.en_US
dc.contributor.authorTornikoski, M.en_US
dc.contributor.authorLahteenmaki, A.en_US
dc.contributor.authorChamani, Waraen_US
dc.contributor.authorEnestam, S.en_US
dc.contributor.authorKiehlmann, S.en_US
dc.contributor.authorHovatta, T.en_US
dc.contributor.authorSmith, P. S.en_US
dc.contributor.authorPontrelli, P.en_US
dc.contributor.departmentMetsähovi Radio Observatoryen
dc.contributor.departmentDepartment of Electronics and Nanoengineeringen
dc.contributor.groupauthorAnne Lähteenmäki Groupen
dc.contributor.organizationUniversity of Utahen_US
dc.contributor.organizationHarvard Universityen_US
dc.contributor.organizationUniversity of California, Los Angelesen_US
dc.contributor.organizationIowa State Universityen_US
dc.contributor.organizationUniversity of Potsdamen_US
dc.contributor.organizationWashington University St. Louisen_US
dc.contributor.organizationNational University of Ireland, Galwayen_US
dc.contributor.organizationPurdue Universityen_US
dc.contributor.organizationPennsylvania State Universityen_US
dc.contributor.organizationMcGill Universityen_US
dc.contributor.organizationUniversity of Minnesota Twin Citiesen_US
dc.contributor.organizationCalifornia State University, East Bayen_US
dc.contributor.organizationGerman Electron Synchrotronen_US
dc.contributor.organizationUniversity of California, Santa Cruzen_US
dc.contributor.organizationUniversity of Delawareen_US
dc.contributor.organizationColumbia Universityen_US
dc.contributor.organizationUniversity of Iowaen_US
dc.contributor.organizationDePauw Universityen_US
dc.contributor.organizationUniversity College Dublinen_US
dc.contributor.organizationGeorgia Institute of Technologyen_US
dc.contributor.organizationUniversity of Chicagoen_US
dc.contributor.organizationCork Institute of Technologyen_US
dc.contributor.organizationBoston Universityen_US
dc.contributor.organizationRAS - P.N. Lebedev Physics Instituteen_US
dc.contributor.organizationCSICen_US
dc.contributor.organizationSt. Petersburg State Universityen_US
dc.contributor.organizationCrimean Astrophysical Observatoryen_US
dc.contributor.organizationUniversity of Arizonaen_US
dc.contributor.organizationCalifornia Institute of Technologyen_US
dc.contributor.organizationUniversity of Turkuen_US
dc.date.accessioned2018-05-22T14:40:58Z
dc.date.available2018-05-22T14:40:58Z
dc.date.issued2018-04-01en_US
dc.description.abstractCombined with measurements made by very-long-baseline interferometry, the observations of fast TeV gamma-ray flares probe the structure and emission mechanism of blazar jets. However, only a handful of such flares have been detected to date, and only within the last few years have these flares been observed from lower-frequency-peaked BL Lac objects and flat-spectrum radio quasars. We report on a fast TeV gamma-ray flare from the blazar BL Lacertae observed by the Very Energetic Radiation Imaging Telescope Array System (VERITAS). with a rise time of ∼2.3 hr and a decay time of ∼36 min. The peak flux above 200 GeV is (4.2 ± 0.6) ×10-6 photon m-2 s-1 measured with a 4-minute-binned light curve, corresponding to ∼180% of the flux that is observed from the Crab Nebula above the same energy threshold. Variability contemporaneous with the TeV gamma-ray flare was observed in GeV gamma-ray, X-ray, and optical flux, as well as in optical and radio polarization. Additionally, a possible moving emission feature with superluminal apparent velocity was identified in Very Long Baseline Array observations at 43 GHz, potentially passing the radio core of the jet around the time of the gamma-ray flare. We discuss the constraints on the size, Lorentz factor, and location of the emitting region of the flare, and the interpretations with several theoretical models that invoke relativistic plasma passing stationary shocks.en
dc.description.versionPeer revieweden
dc.format.extent14
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationAbeysekara, A U, Benbow, W, Bird, R, Brantseg, T, Brose, R, Buchovecky, M, Buckley, J H, Bugaev, V, Connolly, M P, Cui, W, Daniel, M K, Falcone, A, Feng, Q, Finley, J P, Fortson, L, Furniss, A, Gillanders, G H, Gunawardhana, I, Hütten, M, Hanna, D, Hervet, O, Holder, J, Hughes, G, Humensky, T B, Johnson, C A, Kaaret, P, Kar, P, Kertzman, M, Krennrich, F, Lang, M J, Lin, T T Y, McArthur, S, Moriarty, P, Mukherjee, R, O'Brien, S, Ong, R A, Otte, A N, Park, N, Petrashyk, A, Pohl, M, Pueschel, E, Quinn, J, Ragan, K, Reynolds, P T, Richards, G T, Roache, E, Rulten, C, Sadeh, I, Santander, M, Sembroski, G H, Shahinyan, K, Wakely, S P, Weinstein, A, Wells, R M, Wilcox, P, Williams, D A, Zitzer, B, Jorstad, S G, Marscher, A P, Lister, M L, Kovalev, Y Y, Pushkarev, A B, Savolainen, T, Agudo, I, Molina, S N, Gómez, J L, Larionov, V M, Borman, G A, Mokrushina, A A, Tornikoski, M, Lahteenmaki, A, Chamani, W, Enestam, S, Kiehlmann, S, Hovatta, T, Smith, P S, Pontrelli, P & Pohl, M 2018, ' Multiwavelength Observations of the Blazar BL Lacertae : A New Fast TeV Gamma-Ray Flare ', The Astrophysical Journal, vol. 856, no. 2, 95 . https://doi.org/10.3847/1538-4357/aab35cen
dc.identifier.doi10.3847/1538-4357/aab35cen_US
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357
dc.identifier.otherPURE UUID: 803b6d01-2b7d-4202-ab8b-55abb2cfa1f1en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/803b6d01-2b7d-4202-ab8b-55abb2cfa1f1en_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85045568264&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/19265539/Abeysekara_2018_ApJ_856_95.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/31011
dc.identifier.urnURN:NBN:fi:aalto-201805222451
dc.language.isoenen
dc.relation.ispartofseriesAstrophysical Journalen
dc.relation.ispartofseriesVolume 856, issue 2en
dc.rightsopenAccessen
dc.subject.keywordBL Lacertae objects: individual (BL Lacertae = VER J2202+422)en_US
dc.subject.keywordgalaxies: activeen_US
dc.titleMultiwavelength Observations of the Blazar BL Lacertae: A New Fast TeV Gamma-Ray Flareen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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