Detection of a broad iron emission line and sub-millisecond quasiperiodic oscillations from the type I X-ray burster 4U1728-34 in a high state

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dc.creatorPiraino, S.
dc.creatorSantangelo, A.
dc.creatorKaaret, P.
dc.date2000-08-09
dc.date.accessioned2026-07-07T01:54:52Z
dc.date.available2026-07-07T01:54:52Z
dc.descriptionWe report results from simultaneous RossiXTE and BeppoSAX observations of the neutron-star x-ray binary and type I X-ray burster 4U1728-34. The source was found in a high luminosity state, L_X near 0.1 L_Edd, and quasiperiodic oscillations were detected at 1284 +/- 6 Hz, the highest frequency ever observed from this source. The x-ray spectrum shows a broad, FWHM = 0.8 keV, iron K-alpha fluorescence line. We discuss interpretations of the broad line and the quasiperiodic oscillations and how future simultaneous spectral and timing observations can be used to test these interpretations and, potentially, to estimate the mass of the compact object.
dc.description4 pages, to appear in Astronomy and Astrophysics Letters
dc.identifierhttps://arxiv.org/abs/astro-ph/0008141
dc.identifierhttp://arxiv.org/abs/astro-ph/0008141
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/1458
dc.subjectAstrophysics
dc.titleDetection of a broad iron emission line and sub-millisecond quasiperiodic oscillations from the type I X-ray burster 4U1728-34 in a high state
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