The likely detection of pulsed high-energy gamma-ray emission from millisecond pulsar PSR J0218+4232

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dc.creatorKuiper, L.
dc.creatorHermsen, W.
dc.creatorVerbunt, F.
dc.creatorThompson, D. J.
dc.creatorStairs, I. H.
dc.creatorLyne, A. G.
dc.creatorStrickman, M. S.
dc.creatorCusumano, G.
dc.date2000-05-16
dc.date.accessioned2026-07-07T01:53:35Z
dc.date.available2026-07-07T01:53:35Z
dc.descriptionWe report circumstantial evidence for the first detection of pulsed high-energy gamma-ray emission from a millisecond pulsar, PSR J0218+4232, using data collected with the Energetic Gamma Ray Experiment (EGRET) on board the Compton Gamma Ray Observatory (CGRO). The EGRET source 3EG J0222+4253 is shown to be spatially consistent with PSR J0218+4232 for the energy range 100 - 300 MeV. Above 1 GeV the nearby BL Lac 3C 66A is the evident counterpart, and between 300 MeV and 1 GeV both sources contribute to the gamma-ray excess. Folding the 100-1000 MeV photons with an accurate radio ephemeris of PSR J0218+4232 yields a double peaked pulse profile with a ~3.5 sigma modulation significance and with a peak separation of ~0.45 similar to the 0.1-10 keV pulse profile.
dc.descriptionAccepted for publication in A&A: 13 pages containing 10 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0005338
dc.identifierhttp://arxiv.org/abs/astro-ph/0005338
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/1020
dc.subjectAstrophysics
dc.titleThe likely detection of pulsed high-energy gamma-ray emission from millisecond pulsar PSR J0218+4232
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