Chandra and RXTE studies of X-ray/gamma-ray millisecond pulsar PSR J0218+4232: A clue to unidentified gamma-ray sources?

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dc.creatorKuiper, L.
dc.creatorHermsen, W.
dc.date2002-06-20
dc.date.accessioned2026-07-07T02:04:01Z
dc.date.available2026-07-07T02:04:01Z
dc.descriptionMillisecond pulsar PSR J0218+4232 shows remarkable high-energy properties: very hard pulsed X-ray emission up to ~10 keV and a likely detection of high-energy gamma-rays (> 100 MeV) with a soft spectrum. The relative phasing of the X-ray and gamma-ray profiles, however, was unknown. A recently performed Chandra (0.08-10 keV) observation of PSR J0218+4232 settled the phasing down to 0.2 millisecond, and shows that the X-ray pulses are aligned with the gamma-ray pulses providing supporting evidence for our first detection of high-energy gamma-rays from this source. The preliminary results from a recent RXTE (2-250 keV) observation (27-12-2001 -- 7-01-2002) show significant pulsed emission, in a complex profile, up to ~20 keV. The composite high-energy spectrum of this millisecond pulsar is similar to the canonical spectrum of Unidentified Gamma-ray Sources (UGS), making fast (<3-4 ms) millisecond pulsars with low characteristic ages (<10^8 years) good candidates for an UGS association and challenging targets for INTEGRAL observations.
dc.description6 pages, 1 color picture, Paper presented at the XXII Moriond Astrophyics Meeting "The Gamma-Ray Universe", Les Arcs, Savoie, France, 9-16 March 2002. Eds. A. Goldwurm, D. Neumann and J. Tran Thanh Van, The Gioi Publishers (Vietnam)
dc.identifierhttps://arxiv.org/abs/astro-ph/0206356
dc.identifierhttp://arxiv.org/abs/astro-ph/0206356
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/4594
dc.subjectAstrophysics
dc.titleChandra and RXTE studies of X-ray/gamma-ray millisecond pulsar PSR J0218+4232: A clue to unidentified gamma-ray sources?
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