Broad Band X-Ray Spectra of Bright X-Ray Binaries

Details Broad Band X-Ray Spectra of Bright X-Ray Binaries Broad Band X-Ray Spectra of Bright X-Ray Binaries

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995stin...9671096l&link_type=abstract

Technical Report, Massachusetts Inst. of Tech. Cambridge, MA United States Center for Space Research.

Astronomy and Astrophysics

Astronomy

X Ray Binaries, X Ray Spectra, Abundance, X Ray Astronomy, Stellar Spectra, Broadband, Rosat Mission, Ginga Satellite, Iron, Line Spectra, Heavy Elements, X Ray Sources

Scientific paper

During the last days of Ginga, we tried to make simultaneous observations with Ginga and ROSAT of several low-mass x-ray binaries. We succeeded in the case of 1755-33. The simultaneous observations took place in the period 22-23 Sept. 1991. Due to the broad energy range covered jointly by both observatories, some interesting new features were found. During these observations the source was in the 'low' luminosity state. The spectrum observed was much harder than in the high state (1990 observations). Also an iron line near 6.7 keV was found in the low state. The date seem to indicate that the accreting matter in this system may have cosmic abundance, contrary to an earlier suggestion that the heavy element abundance in 1755 is extremely low.

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