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PSR J2021+4026 IN THE GAMMA CYGNI REGION: THE FIRST VARIABLE γ-RAY PULSAR SEEN BY THE Fermi LAT

dc.contributor.authorALLAFORT, A.
dc.contributor.authorBALDINI, Luca
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorBALLET, Jean
dc.contributor.authorBARBIELLINI, Guido
dc.contributor.authorBASTIERI, D.
dc.contributor.authorBELLAZZINI, R.
dc.contributor.authorBONAMENTE, E.
dc.contributor.authorBOTTACINI, E.
hal.structure.identifierInstitut de recherche en astrophysique et planétologie [IRAP]
dc.contributor.authorJ. BRANDT, T.
dc.contributor.authorBREGEON, J.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorBRUEL, Pascal
dc.contributor.authorBUEHLER, R.
dc.contributor.authorA. CALIANDRO, G.
dc.contributor.authorA. CAMERON, R.
dc.contributor.authorCARAVEO, P. A.
dc.contributor.authorCECCHI, C.
dc.contributor.authorCHAVES, R.C.G.
dc.contributor.authorCHEKHTMAN, A.
dc.contributor.authorCHIARO, G.
dc.contributor.authorCLAUS, R.
dc.contributor.authorD'AMMANDO, F.
dc.contributor.authorDE PALMA, F.
dc.contributor.authorDI VENERE, L.
dc.contributor.authorS. DRELL, P.
dc.contributor.authorFAVUZZI, C.
dc.contributor.authorC. FERRARA, E.
dc.contributor.authorFRANCKOWIAK, A.
hal.structure.identifierIstituto Nazionale di Fisica Nucleare, sezione di Bari [INFN, sezione di Bari]
dc.contributor.authorGARGANO, F.
dc.contributor.authorGASPARRINI, D.
dc.contributor.authorGIGLIETTO, N.
dc.contributor.authorGIROLETTI, M.
dc.contributor.authorGLANZMAN, T.
dc.contributor.authorGODFREY, G.
dc.contributor.authorGUIRIEC, S.
hal.structure.identifierIEEC-CSIC
dc.contributor.authorHADASCH, D.
dc.contributor.authorK. HARDING, A.
dc.contributor.authorHAYASHIDA, M.
dc.contributor.authorHAYASHI, K.
dc.contributor.authorHAYS, E.
dc.contributor.authorHEWITT, J.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorHORAN, D.
dc.contributor.authorJOGLER, T.
dc.contributor.authorKERR, M.
dc.contributor.authorKNÖDLSEDER, Jürgen
dc.contributor.authorLANDE, J.
dc.contributor.authorLARSSON, S.
dc.contributor.authorLATRONICO, L.
dc.contributor.authorLEMOINE-GOUMARD, M.
dc.contributor.authorLONGO, F.
hal.structure.identifierIstituto Nazionale di Fisica Nucleare, sezione di Bari [INFN, sezione di Bari]
dc.contributor.authorLOPARCO, F.
dc.contributor.authorLUBRANO, P.
dc.contributor.authorMALYSHEV, D.
dc.contributor.authorMARELLI, M.
dc.contributor.authorMAYER, M.
dc.contributor.authorN. MAZZIOTTA, M.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorMEHAULT, J.
dc.contributor.authorMIZUNO, T.
dc.contributor.authorE. MONZANI, M.
dc.contributor.authorMORSELLI, A.
dc.contributor.authorMURGIA, S.
dc.contributor.authorOMODEI, N.
dc.contributor.authorORIENTI, M.
dc.contributor.authorORLANDO, E.
dc.contributor.authorPANEQUE, D.
dc.contributor.authorPESCE-ROLLINS, M.
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorPIERBATTISTA, M.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorPIRON, F.
dc.contributor.authorPIVATO, G.
dc.contributor.authorPORTER, T.A.
dc.contributor.authorRANDO, R.
dc.contributor.authorRAZZANO, M.
hal.structure.identifierFERMI
dc.contributor.authorREPOSEUR, T.
dc.contributor.authorSARTORI, A.
dc.contributor.authorM. SAZ PARKINSON, P.
dc.contributor.authorSGRO, C.
dc.contributor.authorSPINELLI, P.
dc.contributor.authorW. STRONG, A.
dc.contributor.authorTAKAHASHI, H.
dc.contributor.authorB. THAYER, J.
dc.contributor.authorJ. THOMPSON, D.
dc.contributor.authorTIBALDO, L.
dc.contributor.authorTINIVELLA, M.
dc.contributor.authorF. TORRES, D.
dc.contributor.authorTOSTI, G.
dc.contributor.authorUCHIYAMA, Y.
dc.contributor.authorL. USHER, T.
dc.contributor.authorVANDENBROUCKE, J.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorVASILEIOU, V.
dc.contributor.authorVENTER, C.
dc.contributor.authorVIANELLO, G.
dc.contributor.authorVITALE, V.
dc.contributor.authorL. WINER, B.
dc.contributor.authorS. WOOD, K.
dc.date.issued2013
dc.identifier.issn2041-8205
dc.description.abstractEnLong-term monitoring of PSR J2021+4026 in the heart of the Cygnus region with the Fermi Large Area Telescope unveiled a sudden decrease in flux above 100 MeV over a timescale shorter than a week. The "jump" was near MJD 55850 (2011 October 16), with the flux decreasing from (8.33 ± 0.08) × 10-10 erg cm-2 s-1 to (6.86 ± 0.13) × 10-10 erg cm-2 s-1. Simultaneously, the frequency spindown rate increased from (7.8 ± 0.1) × 10-13 Hz s-1 to (8.1 ± 0.1) × 10-13 Hz s-1. Significant (>5σ) changes in the pulse profile and marginal (<3σ) changes in the emission spectrum occurred at the same time. There is also evidence for a small, steady flux increase over the 3 yr preceding MJD 55850. This is the first observation at γ-ray energies of mode changes and intermittent behavior, observed at radio wavelengths for other pulsars. We argue that the change in pulsed γ-ray emission is due to a change in emission beaming and we speculate that it is precipitated by a shift in the magnetic field structure, leading to a change of either effective magnetic inclination or effective current.
dc.language.isoen
dc.publisherBristol : IOP Publishing
dc.title.enPSR J2021+4026 IN THE GAMMA CYGNI REGION: THE FIRST VARIABLE γ-RAY PULSAR SEEN BY THE Fermi LAT
dc.typeArticle de revue
dc.identifier.doi10.1088/2041-8205/777/1/L2
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Phénomènes cosmiques de haute energie [astro-ph.HE]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Phénomènes cosmiques de haute energie [astro-ph.HE]
dc.identifier.arxiv1308.0358
bordeaux.journalThe Astrophysical journal letters
bordeaux.pageL2
bordeaux.volume777
bordeaux.peerReviewedoui
hal.identifierin2p3-00915598
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//in2p3-00915598v1
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