Sigma observations of the X-ray nova in Musca

Details Sigma observations of the X-ray nova in Musca Sigma observations of the X-ray nova in Musca

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26as...97..293g&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 97, no. 1, p. 293-297.

Astronomy and Astrophysics

Astronomy

19

Black Holes (Astronomy), Gamma Ray Telescopes, Novae, X Ray Stars, Light Curve, Positron Annihilation, Stellar Evolution, Stellar Flares, Stellar Spectra

Scientific paper

The X-ray Nova in Musca was observed in the 40-1300 keV domain by the SIGMA telescope since the very beginning of its flare in January 1991. In this paper previously reported results are summarized and new data collected after August 1991 are presented along with deeper analysis of the 1991 January 20-21 event, during which a strong 480 keV line was detected. A complex picture of the source spectral evolution during that observation is now emerging with the possible presence of two other high energy spectral features which could be eventually interpreted as backscattered emission of the main positron-electron annihilation line.

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