Detailed Multiwavelength Study of the Late-Time Evolution of SN 1978K
Abstract
SN 1978K in the barred spiral galaxy NGC 1313 is a remarkable supernova. It is a rare Type IIn that remains bright at X-ray through radio wavelengths over 30 years after its explosion. Our ongoing multiwavelength observations probe the dense medium that was ejected by the progenitor star, possibly a Luminous Blue Variable. Our previous XMM-Newton studies discovered the X-ray emission has been coming from two shocks in regions that may have a large abundance of helium. While the radio flux has been dropping, the X-ray flux from 2000 to 2008 remained surprisingly constant. Here we request a 100 ksec observation to continue the detailed spectral evolution study. As secondary science, we will obtain data on the ULXs X-1 and X-2, and the other luminous sources in NGC 1313.
- Publication:
-
XMM-Newton Proposal
- Pub Date:
- October 2011
- Bibcode:
- 2011xmm..prop...83S
- Keywords:
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- Supernovae;
- Supernova Remnants;
- Diffuse (galactic) Emission and Isolated Neutron Stars;
- SN 1978K