Gamma-Ray Line Signals From Supernovae Within 100 Mpc~1

摘要

The average number of supernovae per year detectable by γ-rays emitted duringthedecay of ~56Ni to ~56Fe is estimated for galaxies within 100 Mpc as a function of limiting sensitivity using standard super- nova yields and the Sternberg and Asiago supernova catalogs. An instrument having a broad-line (5000 km s~-1) sensitivity of 2 x 10~-6 γ s~-1 cm~-2 should detect a minimum of 1.0± 0.5 Type Ia supernovae Per year, and observe all Type Ia events from the Virgo, Fornax, and possibly the Hydra galaxy clusters.