High energy X-ray observation of the X-ray binary 4U1700-37

Details High energy X-ray observation of the X-ray binary 4U1700-37 High energy X-ray observation of the X-ray binary 4U1700-37

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979stin...8029214p&link_type=abstract

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Physics

Balloon-Borne Instruments, Eclipsing Binary Stars, X Ray Sources, Bremsstrahlung, Neutron Stars, Stellar Winds, Variability, X Ray Telescopes

Scientific paper

During a 54 hr balloon flight from Alice Springs, Australia, on November 22-24, 1978 the X-ray binary 4U1700-37/HD153919 was observed in the energy range 20-180 keV for about two hours on each of three consecutive days. During one observation when the source was in binary eclipse no X-rays were detected from the source region. Flare type variability was seen up to a factor of 25, on time scales of minutes to hours. The source shows a thermal bremsstrahlung spectrum with a temperature kT = 28 keV which does not change significantly during the outbursts. This behavior is discussed in terms of current models for the accretion onto nonmagnetic neutron stars.

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