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A New X-Ray Flare from the Galactic Nucleus Detected with the XMM-Newton

hal.structure.identifierDépartement d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée [DAPNIA]
dc.contributor.authorGOLDWURM, A.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorBRION, E.
hal.structure.identifierDépartement d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée [DAPNIA]
dc.contributor.authorGOLDONI, P.
hal.structure.identifierDépartement d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée [DAPNIA]
dc.contributor.authorFERRANDO, P.
hal.structure.identifierDépartement d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée [DAPNIA]
dc.contributor.authorDAIGNE, F.
hal.structure.identifierDépartement d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée [DAPNIA]
dc.contributor.authorDECOURCHELLE, A.
dc.contributor.authorWARWICK, R. S.
dc.contributor.authorPREDEHL, P.
dc.contributor.editorA. Cotera
dc.contributor.editorH. Falcke
dc.contributor.editorT. R. Geballe
dc.contributor.editorS. Markoff
dc.date.created2003
dc.date.issued2003
dc.date.conference2002-11-03
dc.identifier.issn0004-6337
dc.description.abstractEnThe compact radio source Sgr A*, believed to be the counterpart of the massive black hole at the Galactic nucleus, was observed to undergo rapid and intense flaring activity in X-rays with Chandra in October 2000. We report here the detection with XMM-Newton EPIC cameras of the early phase of a similar X-ray flare from this source, which occurred on 2001 September 4. The source 2-10 keV luminosity increased by a factor ~ 20 to reach a level of 4 10$^{34}$ erg s$^{-1}$ in a time interval of about 900 s, just before the end of the observation. The data indicate that the source spectrum was hard during the flare and can be described by simple power law of slope ~ 0.7. This XMM-Newton observation confirms the results obtained by Chandra, suggests that, in Sgr A*, rapid and intense X-ray flaring is not a rare event and therefore sets some constraints on the emission mechanism models proposed for this source.
dc.language.isoen
dc.publisherWiley-VCH Verlag
dc.source.titleAstronomische Nachrichten
dc.title.enA New X-Ray Flare from the Galactic Nucleus Detected with the XMM-Newton
dc.typeCommunication dans un congrès
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]
dc.identifier.arxivastro-ph/0303583
bordeaux.journalAstronomical Notes / Astronomische Nachrichten
bordeaux.page3-8
bordeaux.volume324 S1
bordeaux.countryUS
bordeaux.title.proceedingAstronomische Nachrichten
bordeaux.conference.cityKailua-Kona
bordeaux.peerReviewedoui
hal.identifierin2p3-00086556
hal.version1
hal.invitednon
hal.proceedingsoui
hal.conference.end2002-11-08
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//in2p3-00086556v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.btitle=Astronomische%20Nachrichten&rft.jtitle=Astronomical%20Notes%20/%20Astronomische%20Nachrichten&rft.date=2003&rft.volume=324%20S1&rft.spage=3-8&rft.epage=3-8&rft.eissn=0004-6337&rft.issn=0004-6337&rft.au=GOLDWURM,%20A.&BRION,%20E.&GOLDONI,%20P.&FERRANDO,%20P.&DAIGNE,%20F.&rft.genre=unknown


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