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Gamma ray pulsars with the GLAST LAT

hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorGUILLEMOT, L.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorLEMOINE-GOUMARD, M.
dc.date.issued2008
dc.date.conference2007-07-03
dc.description.abstractEnThe Gamma-ray Large Area Space Telescope (GLAST) will be launched less than a year from now, and its Large Area Telescope (LAT) is expected to discover scores to hundreds of gamma-ray pulsars. This poster discusses which of the over 1700 known pulsars, mostly visible only at radio frequencies, are likely to emit >100 MeV gamma-rays with intensities detectable by the LAT. The main figure of merit used to select gamma-ray pulsar candidates is sqrt(E-dot)/d2, where E-dot is the energy loss due to rotational spindown, and d is the distance to the pulsar. The figure of merit incorporates spin-down flux at earth (proportional to E-dot/d2) times efficiency, assumed proportional to 1/sqrt(E-dot). A few individual objects are cited to illustrate the issues. Since large E-dot pulsars also tend to have large timing noise and occasional glitches, their ephemerides can become inaccurate in weeks to months. To detect and study the gamma-ray emission the photons must be accurately tagged with the pulse phase. With hours to days between gamma-ray photon arrival times from a pulsar and months to years of LAT exposure needed for good detections, GLAST will need timing measurements throughout the continuous gamma-ray observations. The poster will describe efforts to coordinate pulsar timing of the candidate gamma-ray pulsars.
dc.language.isoen
dc.source.titleProceedings of the 30th International Cosmic Ray Conference
dc.title.enGamma ray pulsars with the GLAST LAT
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]
bordeaux.page855-858
bordeaux.volume2
bordeaux.countryMX
bordeaux.title.proceedingProceedings of the 30th International Cosmic Ray Conference
bordeaux.conference.cityMerida
bordeaux.peerReviewedoui
hal.identifierin2p3-00322836
hal.version1
hal.invitednon
hal.proceedingsoui
hal.conference.end2007-07-11
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//in2p3-00322836v1
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