The type Ia supernova SN 1998bu in M96 was observed by COMPTEL for a total of 88 days starting 17 days after the detection of the SN. A special mode improving the low-energy sensitivity was invoked. We obtained images in the 847 keV and 1238 keV lines of 56Co using an improved point-spread function for the low-energies. We do not detect SN1998bu. Sensitive upper limits at both energies constrain the standard supernova model for this event.
Space Science Center, Physics
AIP Conference Proceedings
Digital Object Identifier (DOI)
COMPTEL upper limits for the 56Co γ-rays from SN1998bu Georgii, R. and Plüschke, S. and Diehl, R. and Collmar, W. and Lichti, G. G. and Schönfelder, V. and Bloemen, H. and Knödlseder, J. and McConnell, M. and Ryan, J. and Bennett, K., AIP Conference Proceedings, 510, 49-53 (2000), DOI:http://dx.doi.org/10.1063/1.1303172
© 2000 American Institute of Physics