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The Progenitor of Supernova 1993J Revisited
S. D. Van Dyk, P. M. Garnavich, A. V. Filippenko +4
From Hubble Space Telescope images with 0.05" resolution we identify four stars brighter than V=25 mag within 2.5" of SN 1993J in M81 which contaminated previous ground-based brigh…
Radio Emission from SN 1988Z and Very Massive Star Evolution
C. L. Williams, N. Panagia, S. D. Van Dyk +3
We present observations of the radio emission from the unusual SN 1988Z made with the VLA from 385 to 4,438 days after explosion. SN 1988Z is the most distant radio supernova ever…
Possible Recovery of SN 1961V In Hubble Space Telescope Archival Images
Schuyler D. Van Dyk, Alexei V. Filippenko, Weidong Li
SN 1961V in NGC 1058 was originally classified by Fritz Zwicky as a ``Type V'' supernova. However, it has been argued that SN 1961V was not a genuine supernova, but instead the sup…
Narrow Lines in Type II Supernovae -- Probing the Circumstellar Nebulae of the Progenitors
Robert A. Gruendl, You-Hua Chu, Schuyler D. Van Dyk +1
We have carried out a high-dispersion (R~30,000) echelle spectroscopic survey of 16 Type II supernovae (SNe) to search for narrow emission lines from circumstellar nebulae ejected…
Strongly decelerated expansion of SN1979C
J. M. Marcaide, M. A. Perez-Torres, E. Ros +6
We observed SN1979C in M100 on 4 June 1999, about twenty years after explosion, with a very sensitive four-antenna VLBI array at the wavelength of 18cm. The distance to M100 and th…
A Hubble Space Telescope Snapshot Survey of Nearby Supernovae
Weidong Li, Alexei V. Filippenko, Schuyler D. Van Dyk +4
We present photometry of 12 recent supernovae (SNe) recovered in a {\it Hubble Space Telescope} Snapshot program, and tie the measurements to earlier ground-based observations, in…