Search for gamma ray lines from SS433

Astronomy and Astrophysics – Astronomy

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Binary Stars, Doppler Effect, Frequency Shift, Gamma Ray Spectra, Gamma Rays, Line Spectra, Periodic Variations, Gamma Ray Astronomy, Heao 3, Solar Maximum Mission, Supernova Remnants

Scientific paper

Data obtained with the Gamma Ray Spectrometer (0.3 to 9 MeV) aboard the Solar Maximum Mission satellite from 1980 to 1985 for evidence of the reported Doppler shifted lines from SS433 were examined. The data base covers a total of 468 days when SS433 was in the field of view and includes times of quiescent and flaring radio activity. In 9 day integrations of the SMM data no evidence is found for gamma ray line emission from SS433. The 99% confidence upper limits for 9 day integrations of the shifted 1.37 and 6.1 MeV lines are 0.0013 gamma/sq cm-s and 0.0007 gamma/sq cm-s, respectively. The 360 day time averaged upper limits are 0.0002 gamma/sq cm-s x 0.0001 gamma/sq cm-s for both lines.

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