A BeppoSAX observation of the massive X-ray binary 4U1700-37

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dc.creatorReynolds, A. P.
dc.creatorOwens, A.
dc.creatorKaper, L.
dc.creatorParmar, A. N.
dc.creatorSegreto, A.
dc.date1999-04-26
dc.date.accessioned2026-07-07T02:31:23Z
dc.date.available2026-07-07T02:31:23Z
dc.descriptionA 0.5-200 keV BeppoSAX spectrum of the non-pulsating high-mass X-ray binary 4U1700-37 is presented. The spectrum is well characterized by the standard accreting pulsar model of an absorbed power-law with a photon index of 1.07 +0.02 -0.03, sharply modified by an exponential cutoff above 5.9 +/- 0.2 keV. The e-folding energy of the cutoff is 23.9 +/-0.5 keV. A soft bremsstrahlung component with a temperature of 0.2 +/- 0.1 keV is also required, together with a narrow iron line at 6.5 keV. Both continuum components are absorbed by a column of (5.1 +/- 0.2) x 10E22 atom/cm2. There is some evidence for the presence of a broad cyclotron absorption feature at ~37 keV, although we cannot exclude the possibility that this is due to an incorrect modeling of the continuum, or instrumental effects. The hypothesis that the compact object is a neutron star rather than a black hole seems most likely.
dc.description4 pages. Accepted for publication in A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/9904349
dc.identifierhttp://arxiv.org/abs/astro-ph/9904349
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/14135
dc.subjectAstrophysics
dc.titleA BeppoSAX observation of the massive X-ray binary 4U1700-37
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