HEAD Division Meeting 1999, April 1999
Session 8. Supernova Remnants
Poster, Monday, April 12, 1999, 8:30am-6:10pm, Gold Room

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[8.10] SN1978K in NGC 1313: An Update with ROSAT HRI, ASCA, Hubble Space Telescope, Optical, and Radio Observations

Eric M. Schlegel (Smithsonian Astrophysical Observatory), Stuart Ryder (Joint Astronomy Center), Lister Staveley-Smith (Australia Telescope National Facility), Edward Colbert (NASA-GSFC/NRC), Robert Petre (NASA-GSFC), Michael Dopita (Mt. Stromlo and Siding Spring Observatories), D. Campbell-Wilson (University of Sydney)

We update the light curves of SN 1978K from the X-ray, optical, and radio observations that we have obtained over the past 5 years. We also include an ultraviolet spectrum obtained with the Hubble Space Telescope as well as an optical spectrum. The X-ray light curve remains constant within the errors. In the HST spectrum, we detect emission lines from Ly-{\alpha}, [Ne~IV] 2422-2424 {Å}, and the Mg II doublet at 2800 {Å}. The optical light curve is consistent with a constant source, although recent observations suggest a slight increase in brightness. The radio light curves are continuing their decline. We discuss the implications of these observations for our understanding of SN1978K.

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