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Do the photometric colors of Type II-P Supernovae allow accurate determination of host galaxy extinction?
Kevin Krisciunas, Mario Hamuy, Nicholas B. Suntzeff +10
We present infrared photometry of SN 1999em, plus optical photometry, infrared photometry, and optical spectroscopy of SN 2003hn. Both objects were Type II-P supernovae. The V-[RIJ…
SN 2005bf: A Possible Transition Event Between Type Ib/c Supernovae and Gamma Ray Bursts
Gaston Folatelli, Carlos Contreras, M. M. Phillips +22
We present u'g'r'i'BV photometry and optical spectroscopy of the Type Ib/Ic SN 2005bf covering the first ~100 days following discovery. The u'g'BV light curves displayed a double-p…
Optical and Infrared Photometry of the Nearby Type Ia Supernovae 1999ee, 2000bh, 2000ca, and 2001ba
Kevin Krisciunas, Mark M. Phillips, Nicholas B. Suntzeff +20
We present near infrared photometry of the Type Ia supernova 1999ee; also, optical and infrared photometry of the Type Ia SNe 2000bh, 2000ca, and 2001ba. For SNe 1999ee and 2000bh…
Evidence for an asymptotic giant branch star in the progenitor system of a type Ia supernova
Mario Hamuy, M. M. Phillips, Nicholas B. Suntzeff +8
A type Ia supernova (SN Ia), one of the two main classes of exploding stars, is recognized by the absence of hydrogen and the presence of elements such as silicon and sulphur in it…
Optical Photometry of the Type Ia SN 1999ee and the Type Ib/c SN 1999ex in IC 5179
M. Stritzinger, M. Hamuy, N. B. Suntzeff +14
We present UBVRIz lightcurves of the Type Ia SN 1999ee and the Type Ib/c SN 1999ex, both located in the galaxy IC 5179. SN 1999ee has an extremely well sampled lightcurve spanning…
The Distance to SN 1999em from the Expanding Photosphere Method
M. Hamuy, P. A. Pinto, J. Maza +22
We present optical and IR spectroscopy of the first two months of evolution of the Type II SN 1999em. We combine these data with high-quality optical/IR photometry beginning only t…