@inproceedings{69b186d8b01a400b86af4c33d7451c76,
title = "OSSE observations of starburst galaxy M82",
abstract = " OSSE observed the starburst galaxy M82 in two viewing periods of 8 and 14 days. M82's priority as a target had been established on the grounds that the average supernova rate may be very high there, so that a significant chance of 56 Co detection exists. If M82 is at 3.4 Mpc distance, normal Type II (e.g. SN1987A) are too dim in 56 Co lines, but the Wolf-Rayet derived Type Ib, which are also massive-star core implosion objects, might be detectable to OSSE. 1,2 Expected fluxes of the 847 keV γ-line of 56 Co would be near (2-5)× 10 -5 γ cm -2 s -1 . A Type Ia in M82 would be very bright,3 near (3-6) γ 10 -4 -γ cm -2 s -1 . We present OSSE background subtracted spectra of the M82 region for viewing periods 7 and 18. These spectra show no significant excess at 847 keV or at 1238 keV, the two strongest 56 Co γ-lines. When we fit a smooth gamma continuum plus a feature having both the 847 keV and 1238 keV lines to the OSSE data, we obtain for the 847 keV line amplitude the values (-4.18 ± 3.45) × 10 -5 -γ cm -2 s -1 for viewing period 7 and (0.84 ± 2.85) × 10 -5 γ cm -2 s -1 for viewing period 18. We discuss the implications on the supernova rate in M82. ",
author = "The, {Lih Sin} and Clayton, {Donald D.} and Leising, {Mark D.} and Kurfess, {J. D.} and Johnson, {W. N.} and Kinzer, {R. L.} and Strickman, {M. S.} and Jung, {G. V.} and Grabelsky, {D. A.} and Purcell, {W. R.} and Ulmer, {M. P.}",
note = "Publisher Copyright: {\textcopyright} 1993 American Institute of Physics.; Compton Symposium ; Conference date: 15-10-1992 Through 17-10-1992",
year = "1993",
doi = "10.1063/1.44275",
language = "English (US)",
series = "AIP Conference Proceedings",
publisher = "American Institute of Physics Inc.",
pages = "503--507",
editor = "Neil Gehrels and Friedlander, {Michael W.} and Macomb, {Daryl J.}",
booktitle = "Compton Gamma-Ray Observatory",
}