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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…
High luminosity, slow ejecta and persistent carbon lines: SN 2009dc challenges thermonuclear explosion scenarios
S. Taubenberger, S. Benetti, M. Childress +22
SN 2009dc shares similarities with normal Type Ia supernovae, but is clearly overluminous, with a (pseudo-bolometric) peak luminosity of log(L) = 43.47 [erg/s]. Its light curves de…
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…
An asymmetric explosion as the origin of spectral evolution diversity in type Ia supernovae
K. Maeda, S. Benetti, M. Stritzinger +10
Type Ia Supernovae (SNe Ia) form an observationally uniform class of stellar explosions, in that more luminous objects have smaller decline-rates. This one-parameter behavior allow…
Multiple Major Outbursts from a Restless Luminous Blue Variable in NGC 3432
A. Pastorello, M. T. Botticella, C. Trundle +16
We present new photometric and spectroscopic observations of an unusual luminous blue variable (LBV) in NGC 3432, covering three major outbursts in October 2008, April 2009 and Nov…