OBSERVATIONS OF GAMMA-RAY LINE PROFILES FROM SUPERNOVA 1987A.

We report observations of fully resolved gamma-ray lines from the decay of sup (56) Co in Supernova 1987A. Data are from the first two balloon flights of the Gamma-Ray Imaging Spectrometer (GRIS), the first of a new generation of high resolution gamma- ray spectrometers for astrophysics. On day 433 (after the initial optical sighting) the 847 and 1238 ke V lines from sup (56) Co were observed at 2.3 and 4.3 sigma significance. On day 613, the lines at 847, 1238, and 2599keV were observed at 4.6, 3.4, and l.9 sigma respectively. The combined significance for the three line complex in both flights is 7.8sigma. Gaussian profiles yield acceptable least-squares fits to the lines.