Observations of Scorpius X-1 from the Salyut 4 spacecraft in January 1975

Details Observations of Scorpius X-1 from the Salyut 4 spacecraft in January 1975 Observations of Scorpius X-1 from the Salyut 4 spacecraft in January 1975

Dec 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976sval....2..208m&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 2, Nov. 1976, p. 528-533.) Soviet Astronomy Letters, vol. 2, Nov.-Dec. 1976, p. 208-210

Astronomy and Astrophysics

Astronomy

Energy Spectra, Salyut Space Station, Spaceborne Astronomy, Variable Stars, X Ray Astronomy, X Ray Stars, Bremsstrahlung, Emission Spectra, Optical Thickness, Plasma Spectra, Spaceborne Telescopes, Thomson Scattering

Scientific paper

Sco X-1 was observed five times from the Salyut 4 space station in the period from January 15 to 17, 1975, when the station was oriented toward the local zenith. It is found that the form of the source's energy spectrum in the region below 2 keV varied from observation to observation. Two possible interpretations of the data are considered: (1) emission from an optically thin plasma with variable absorption or accompanied by the appearance of an additional source in the low-energy region and (2) emission from a plasma with large optical thickness to Thomson scattering accompanied by the appearance of a 'soft' source.

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