Soft X ray emission from supergiant X ray binaries detected on the ROSAT all-sky survey

Details Soft X ray emission from supergiant X ray binaries detected on the ROSAT all-sky survey Soft X ray emission from supergiant X ray binaries detected on the ROSAT all-sky survey

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992eocm.rept..163h&link_type=abstract

In ESA, Environment Observation and Climate Modelling Through International Space Projects. Space Sciences with Particular Empha

Astronomy and Astrophysics

Astronomy

Rosat Mission, Sky Surveys (Astronomy), X Ray Binaries, X Ray Spectra, Bremsstrahlung, Spaceborne Astronomy, Supergiant Stars, X Ray Astronomy

Scientific paper

The supergiant x-ray binaries 4U 1700-37 and Vela X-1 were detected during the Rosat all sky survey with an average count rate of about 1 count/sec. The x-ray spectra can be fitted with a Bremsstrahlung model with a temperature of 0.5 keV. The x-ray spectrum in the Rosat PSPC (Position Sensitive Proportional Counter) band is consistent with the soft component seen during a Ginga observation of 4U 1700-37. The survey light curve for both sources indicate an eclipse of the soft component which continues after eclipse egress of the hard x-ray source. The low absorption of the soft component suggests that it originated far out in the stellar wind.

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