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Hubble Space Telescope and Ground-Based Observations of the Type Iax Supernovae SN 2005hk and SN 2008A
Curtis McCully, Saurabh W. Jha, Ryan J. Foley +24
We present Hubble Space Telescope (HST) and ground-based optical and near-infrared observations of SN 2005hk and SN 2008A, typical members of the Type Iax class of supernovae (SNe)…
The Fast and Furious Decay of the Peculiar Type Ic Supernova 2005ek
M. R. Drout, A. M. Soderberg, P. A. Mazzali +21
We present extensive multi-wavelength observations of the extremely rapidly declining Type Ic supernova, SN 2005ek. Reaching a peak magnitude of M_R = -17.3 and decaying by ~3 mag…
Constraints on dark energy with the LOSS SN Ia sample
Mohan Ganeshalingam, Weidong Li, Alexei V. Filippenko
We present a cosmological analysis of the Lick Observatory Supernova Search (LOSS) Type Ia supernova (SN Ia) photometry sample introduced by Ganeshalingam et al. (2010). These SNe…
High-Velocity Features in Type Ia Supernova Spectra
Michael J. Childress, Alexei V. Filippenko, Mohan Ganeshalingam +1
We use a sample of 58 low-redshift (z <= 0.03) Type Ia supernovae (SNe Ia) having well-sampled light curves and spectra near maximum light to examine the behaviour of high-velocity…
The Progenitor of Supernova 2011dh Has Vanished
Schuyler D. Van Dyk, WeiKang Zheng, Kelsey I. Clubb +7
We conducted Hubble Space Telescope (HST) Snapshot observations of the Type IIb Supernova (SN) 2011dh in M51 at an age of ~641 days with the Wide Field Camera 3. We find that the y…
Late-Time Circumstellar Interaction in a Spitzer Selected Sample of Type IIn Supernovae
Ori D. Fox, Alexei V. Filippenko, Michael F. Skrutskie +4
Type IIn supernovae (SNe IIn) are a rare (< 10%) subclass of core-collapse SNe that exhibit relatively narrow emission lines from a dense, pre-existing circumstellar medium (CSM).…