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Minute-Timescale >100 MeV gamma-ray variability during the giant outburst of quasar 3C 279 observed by Fermi-LAT in 2015 June

dc.contributor.authorACKERMANN, Markus
dc.contributor.authorANANTUA, R.
hal.structure.identifierDivision of Biology, Kansas State University
dc.contributor.authorASANO, K.
dc.contributor.authorBALDINI, Luca
dc.contributor.authorBARBIELLINI, Guido
dc.contributor.authorBASTIERI, D.
dc.contributor.authorGONZALEZ, J. Becerra
dc.contributor.authorBELLAZZINI, R.
dc.contributor.authorBISSALDI, E.
dc.contributor.authorBLANDFORD, R. D.
dc.contributor.authorBLOOM, E. D.
dc.contributor.authorBONINO, R.
dc.contributor.authorBOTTACINI, E.
dc.contributor.authorBRUEL, P.
dc.contributor.authorBUEHLER, R.
dc.contributor.authorCALIANDRO, G. A.
dc.contributor.authorCAMERON, R. A.
dc.contributor.authorCARAGIULO, M.
dc.contributor.authorCARAVEO, P. A.
dc.contributor.authorCAVAZZUTI, E.
hal.structure.identifierDipartimento di Scienze Biomediche Sperimentali e Cliniche “Mario Serio”
dc.contributor.authorCECCHI, C.
hal.structure.identifierNaval Research Laboratory [NRL]
dc.contributor.authorCHEUNG, C. C.
dc.contributor.authorCHIANG, J.
dc.contributor.authorCHIARO, G.
dc.contributor.authorCIPRINI, S.
dc.contributor.authorCOHEN-TANUGI, J.
dc.contributor.authorCOSTANZA, F.
dc.contributor.authorCUTINI, S.
dc.contributor.authorD’AMMANDO, F.
dc.contributor.authorPALMA, F. De
dc.contributor.authorDESIANTE, R.
hal.structure.identifierSLAC National Accelerator Laboratory [SLAC]
dc.contributor.authorDIGEL, S. W.
hal.structure.identifierUGC-DAE Consortium for Scientific Research
dc.contributor.authorLALLA, N. Di
hal.structure.identifierDepartment of Molecular Medicine
dc.contributor.authorMAURO, M. Di
dc.contributor.authorVENERE, L. Di
dc.contributor.authorDRELL, P. S.
dc.contributor.authorFAVUZZI, C.
dc.contributor.authorFEGAN, S. J.
hal.structure.identifierNASA Goddard Space Flight Center [GSFC]
dc.contributor.authorFERRARA, E. C.
dc.contributor.authorFUKAZAWA, Y.
hal.structure.identifierLondon School of Hygiene and Tropical Medicine [LSHTM]
dc.contributor.authorFUNK, S.
hal.structure.identifierIstituto Nazionale di Fisica Nucleare, sezione di Bari [INFN, sezione di Bari]
dc.contributor.authorFUSCO, P.
dc.contributor.authorGARGANO, F.
dc.contributor.authorGASPARRINI, D.
dc.contributor.authorGIGLIETTO, N.
dc.contributor.authorGIORDANO, F.
hal.structure.identifierIstituto Nazionale di Astrofisica [INAF]
dc.contributor.authorGIROLETTI, M.
hal.structure.identifierÉcole nationale supérieure d'architecture de Nantes [ENSA Nantes]
hal.structure.identifierUniversité Paris Diderot - Paris 7 [UPD7]
dc.contributor.authorGRENIER, I. A.
hal.structure.identifierUnité Scientifique de la Station de Nançay [USN]
hal.structure.identifierLaboratoire de Physique et Chimie de l'Environnement et de l'Espace [LPC2E]
dc.contributor.authorGUILLEMOT, Lucas
dc.contributor.authorGUIRIEC, S.
dc.contributor.authorHAYASHIDA, M.
dc.contributor.authorHAYS, E.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorHORAN, D.
dc.contributor.authorJÓHANNESSON, G.
dc.contributor.authorKENSEI, S.
dc.contributor.authorKOCEVSKI, D.
hal.structure.identifierIstituto Nazionale di Fisica Nucleare, Sezione di Pisa
dc.contributor.authorKUSS, M.
hal.structure.identifierDIEE
dc.contributor.authorMURA, G. La
dc.contributor.authorLARSSON, S.
dc.contributor.authorLATRONICO, L.
hal.structure.identifierÉquipe de Recherche en Textes, Informatique, Multilinguisme [ERTIM]
dc.contributor.authorLI, J.
dc.contributor.authorLONGO, F.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorLOPARCO, F.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorLOTT, B.
dc.contributor.authorLOVELLETTE, M. N.
dc.contributor.authorLUBRANO, P.
dc.contributor.authorMADEJSKI, G. M.
dc.contributor.authorMAGILL, J. D.
dc.contributor.authorMALDERA, S.
dc.contributor.authorMANFREDA, A.
hal.structure.identifierLaboratoire de Physique Corpusculaire - Clermont-Ferrand [LPC]
dc.contributor.authorMAYER, M.
dc.contributor.authorMAZZIOTTA, M. N.
hal.structure.identifierHansen Experimental Physics Lab [Stanford] [HEPL]
dc.contributor.authorMICHELSON, P. F.
dc.contributor.authorMIRABAL, N.
dc.contributor.authorMIZUNO, T.
dc.contributor.authorMONZANI, M. E.
dc.contributor.authorMORSELLI, A.
dc.contributor.authorMOSKALENKO, I. V.
dc.contributor.authorNALEWAJKO, K.
hal.structure.identifierUniversità degli studi di Torino = University of Turin [UNITO]
hal.structure.identifierIstituto Nazionale di Fisica Nucleare, Sezione di Torino [INFN, Sezione di Torino]
dc.contributor.authorNEGRO, M.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorNUSS, E.
dc.contributor.authorOHSUGI, T.
dc.contributor.authorORLANDO, E.
dc.contributor.authorPANEQUE, D.
hal.structure.identifierUniversity of Botswana [UB]
dc.contributor.authorPERKINS, J. S.
dc.contributor.authorPESCE-ROLLINS, M.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorPIRON, F.
dc.contributor.authorPIVATO, G.
hal.structure.identifierDepartment of Animal and Avian Sciences
dc.contributor.authorPORTER, T. A.
dc.contributor.authorPRINCIPE, G.
dc.contributor.authorRANDO, R.
dc.contributor.authorRAZZANO, M.
dc.contributor.authorRAZZAQUE, S.
dc.contributor.authorREIMER, A.
dc.contributor.authorSCARGLE, J. D.
hal.structure.identifierCentre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand [CHU Dijon]
dc.contributor.authorSGRÒ, C.
dc.contributor.authorSIKORA, M.
hal.structure.identifierLaboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA]
dc.contributor.authorSIMONE, D.
dc.contributor.authorSISKIND, E. J.
dc.contributor.authorSPADA, F.
hal.structure.identifierÉcole nationale supérieure d'architecture de Versailles [ENSA-V]
dc.contributor.authorSPINELLI, P.
dc.contributor.authorSTAWARZ, L.
dc.contributor.authorTHAYER, J. B.
hal.structure.identifierSea Mammal Research Unit
dc.contributor.authorTHOMPSON, D. J.
dc.contributor.authorTORRES, D. F.
dc.contributor.authorTROJA, E.
hal.structure.identifierDepartment of Physics [Tokyo]
dc.contributor.authorUCHIYAMA, Y.
hal.structure.identifierDepartment of Biostatistics [Houston]
dc.contributor.authorYUAN, Y.
hal.structure.identifierLaboratoire de Conception Fabrication Commande [LCFC]
dc.contributor.authorZIMMER, S.
dc.date.issued2016-06
dc.identifier.issn2041-8205
dc.description.abstractEnOn 2015 June 16, Fermi-LAT observed a giant outburst from the flat spectrum radio quasar 3C 279 with a peak $>100$ MeV flux of $\sim3.6\times10^{-5}\;{\rm photons}\;{\rm cm}^{-2}\;{\rm s}^{-1}$ averaged over orbital period intervals. It is the historically highest $\gamma$-ray flux observed from the source including past EGRET observations, with the $\gamma$-ray isotropic luminosity reaching $\sim10^{49}\;{\rm erg}\;{\rm s}^{-1}$. During the outburst, the Fermi spacecraft, which has an orbital period of 95.4 min, was operated in a special pointing mode to optimize the exposure for 3C 279. For the first time, significant flux variability at sub-orbital timescales was found in blazar observations by Fermi-LAT. The source flux variability was resolved down to 2-min binned timescales, with flux doubling times less than 5 min. The observed minute-scale variability suggests a very compact emission region at hundreds of Schwarzschild radii from the central engine in conical jet models. A minimum bulk jet Lorentz factor ($\Gamma$) of 35 is necessary to avoid both internal $\gamma$-ray absorption and super-Eddington jet power. In the standard external-radiation-Comptonization scenario, $\Gamma$ should be at least 50 to avoid overproducing the synchrotron-self-Compton component. However, this predicts extremely low magnetization ($\sim5\times10^{-4}$). Equipartition requires $\Gamma$ as high as 120, unless the emitting region is a small fraction of the dissipation region. Alternatively, we consider $\gamma$ rays originating as synchrotron radiation of $\gamma_{\rm e}\sim1.6\times10^6$ electrons, in magnetic field $B\sim1.3$ kG, accelerated by strong electric fields $E\sim B$ in the process of magnetoluminescence. At such short distance scales, one cannot immediately exclude production of $\gamma$ rays in hadronic processes.
dc.language.isoen
dc.publisherBristol : IOP Publishing
dc.subject.enradiation mechanisms: non-thermal
dc.subject.engamma rays: galaxies
dc.subject.enquasars: individual (3C 27
dc.subject.engalaxies: jets
dc.subject.engalaxies: active
dc.title.enMinute-Timescale >100 MeV gamma-ray variability during the giant outburst of quasar 3C 279 observed by Fermi-LAT in 2015 June
dc.title.enAmmando 24,25 , F. de Palma 12
dc.typeArticle de revue
dc.identifier.doi10.3847/2041-8205/824/2/L20
dc.subject.halPlanète et Univers [physics]
dc.identifier.arxiv1605.05324v1
bordeaux.journalThe Astrophysical journal letters
bordeaux.page8 pages
bordeaux.volume824
bordeaux.issueL20
bordeaux.peerReviewedoui
hal.identifierinsu-01360099
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//insu-01360099v1
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