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Supernova 2002bo: inadequacy of the single parameter description
S. Benetti, P. Meikle, M. Stehle +15
We present optical/near-infrared photometry and spectra of the type Ia SN 2002bo spanning epochs from -13 days before maximum B-band light to +102 days after. The pre-maximum optic…
The Type Ic Hypernova SN 2003dh/GRB 030329
P. A. Mazzali, J. Deng, N. Tominaga +6
The spectra of SN 2003dh, identified in the afterglow of GRB030329, are modeled using radiation transport codes. It is shown that SN 2003dh had a high explosion kinetic energy ($\s…
Hypernovae and Other Black-Hole-Forming Supernovae
K. Nomoto, K. Maeda, P. A. Mazzali +3
During the last few years, a number of exceptional core-collapse supernovae (SNe) have been discovered. Their kinetic energy of the explosions are larger by more than an order of m…
Optical Photometry and Spectroscopy of the SN 1998bw-like Type Ic Supernova 2002ap
Ryan J. Foley, Marina S. Papenkova, Brandon J. Swift +6
We present optical photometric and spectral data of the peculiar Type Ic SN 2002ap. Photometric coverage includes UBVRI bands from 2002 January 30, the day after discovery, through…
On The Spectrum and Spectropolarimetry of Type Ic Hypernova SN 2003dh/GRB 030329
K. S. Kawabata, J. Deng, L. Wang +32
Spectroscopic and spectropolarimetric observations of SN 2003dh/GRB 030329 obtained in 2003 May using the Subaru 8.2 m telescope are presented. The properties of the SN are investi…
Nucleosynthesis in Black-Hole-Forming Supernovae and Abundance Patterns of Extremely Metal-Poor Stars
K. Nomoto, K. Maeda, H. Umeda +4
Stars more massive than 20 - 25 \ms form a black hole at the end of their evolution. Stars with non-rotating black holes are likely to collapse "quietly" ejecting a small am…
Evidence for Supernova Signatures in the Spectrum of the Late-time Bump of the Optical Afterglow of GRB 021211
M. Della Valle, D. Malesani, S. Benetti +14
We present photometric and spectroscopic observations of the gamma-ray burst GRB 021211 obtained during the late stages of its afterglow. The light curve shows a rebrightening occu…
A Two-Component Model for the Light Curves of Hypernovae
K. Maeda, P. A. Mazzali, J. Deng +4
The light curves of 'hypernovae', i.e. very energetic supernovae with ergs $\gsim 5-10$ are characterized at epochs of a few months by a phase of linear de…
A second glance at SN 2002ap and the M74 field with XMM-Newton
Roberto Soria, Elena Pian, Paolo Mazzali
We have re-observed the field of M74 in January 2003 with XMM-Newton, 11 months after the X-ray detection of SN 2002ap. From a comparison of the two XMM-Newton observations we obta…