Search for Pulsed Gamma rays > 0.75 MeV from SN1987A Kerrick, A. D. ; Ait-Ouamer, F. ; O'Neill, T. J. ; Tümer, O. T. ; Zych, A. D. ; White, R. S. ; Middleditch, J. Abstract Publication: International Cosmic Ray Conference Pub Date: August 1991 Bibcode: 1991ICRC....1..185K