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A Massive Progenitor of the Luminous Type IIn Supernova 2010jl
Nathan Smith, Weidong Li, Adam A. Miller +6
The bright, nearby, recently discovered supernova SN2010jl is a member of the rare class of relatively luminous Type~IIn events. Here we report archival HST observations of its hos…
Supernova 2008bk and Its Red Supergiant Progenitor
Schuyler D. Van Dyk, Tim J. Davidge, Nancy Elias-Rosa +8
We have obtained limited photometric and spectroscopic data for Supernova (SN) 2008bk in NGC 7793, primarily at >~ 150 d after explosion. We find that it is a Type II-Plateau (II-P…
Luminous Blue Variable eruptions and related transients: Diversity of progenitors and outburst properties
Nathan Smith, Weidong Li, Jeffrey M. Silverman +2
We present new light curves and spectra for a number of extragalactic optical transients or "SN impostors" related to giant eruptions of LBVs, and we provide a comparative discussi…
Near-Ultraviolet Properties of a Large Sample of Type Ia Supernovae as Observed with the Swift UVOT
Peter A. Milne, Peter J. Brown, Peter W. A. Roming +15
We present ultraviolet (UV) and optical photometry of 26 Type Ia supernovae (SNe~Ia) observed from March 2005 to March 2008 with the NASA {\it Swift} Ultraviolet and Optical Telesc…
The Absolute Magnitudes of Type Ia Supernovae in the Ultraviolet
Peter J. Brown, Peter W. A. Roming, Peter Milne +19
We examine the absolute magnitudes and light-curve shapes of 14 nearby(redshift z = 0.004--0.027) Type Ia supernovae (SNe~Ia) observed in the ultraviolet (UV) with the Swift Ultrav…
Observed Fractions of Core-Collapse Supernova Types and Initial Masses of their Single and Binary Progenitor Stars
Nathan Smith, Weidong Li, Alexei V. Filippenko +1
We analyse observed fractions of core-collapse SN types from the Lick Observatory SN Search, and we discuss corresponding implications for massive star evolution. For a standard IM…