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A Second Case of Variable Na I D Lines in a Highly-Reddened Type Ia Supernova (with Erratum)
S. Blondin, J. L. Prieto, F. Patat +5
(Original) Recent high-resolution spectra of the Type Ia SN 2006X have revealed the presence of time-variable and blueshifted Na I D features, interpreted by Patat et al. as origin…
SN 2004aw: Confirming Diversity of Type Ic Supernovae
S. Taubenberger, A. Pastorello, P. A. Mazzali +24
Optical and near-infrared observations of the Type Ic supernova (SN) 2004aw are presented, obtained from day -3 to day +413 with respect to the B-band maximum. The photometric evol…
Faint Supernovae and Supernova Impostors: Case studies of SN2002kg/NGC2403-V37 and SN 2003gm
J. R. Maund, S. J. Smartt, R. -P. Kudritzki +6
Photometric and spectroscopic observations of the faint Supernovae (SNe) 2002kg and 2003gm, and their precursors, in NGC 2403 and NGC 5334 respectively, are presented. The properti…
High-Velocity Features: a ubiquitous property of Type Ia SNe
P. A. Mazzali, S. Benetti, G. Altavilla +26
Evidence of high-velocity features such as those seen in the near-maximum spectra of some Type Ia Supernovae (eg SN 2000cx) has been searched for in the available SNIa spectra obse…
SN1999E: Another piece in the SN-GRB connection puzzle
L. Rigon, M. Turatto, S. Benetti +8
Detailed optical and near-IR observations of SN 1999E have confirmed early suggestions that this supernova was indeed a twin of the peculiar type II SN 1997cy: it was exceptionally…
Detection of a light echo from SN1998bu
E. Cappellaro, F. Patat, P. A. Mazzali +6
About 500d after explosion the light curve of the Type Ia SN1998bu suddenly flattened and at the same time the spectrum changed from the typical nebular emission to a blue continuu…
The fading of SN 1997D
S. Benetti, M. Turatto, S. Balberg +7
We present a new set of spectroscopic and photometric data extending the observations of SN 1997D to over 400 days after the explosion. These observations confirm the peculiar prop…
A new faint Type Ia Supernova: SN 1997cn in NGC 5490
M. Turatto, A. Piemonte, S. Benetti +4
Observations of the recent SN 1991bg in the elliptical galaxy NGC 5490 show that this objects closely resembles, both photometrically and spectroscopically, the faint SNIa 1991bg.…
Discovery of the peculiar supernova 1998bw in the error box of GRB980425
T. J. Galama, P. M. Vreeswijk, J. van Paradijs +42
The discovery of X-ray, optical and radio afterglows of gamma-ray bursts (GRBs) and the measurements of the distances to some of them have established that these events come from G…
A `Hypernova' model for SN 1998bw associated with gamma-ray burst of 25 April 1998
K. Iwamoto, P. A. Mazzali, K. Nomoto +24
The discovery of the peculiar supernova (SN) 1998bw and its possible association with the gamma-ray burst (GRB) 980425 provide new clues to the understanding of the explo…
Supernova 1994aj: a probe for pre-supernova evolution and mass loss from the progenitor
S. Benetti, E. Cappellaro, I. J. Danziger +3
Extensive photometric and spectroscopic observations of SN1994aj until 540d after maximum light have been obtained. The photometry around maximum suggests that the SN belongs to th…
The properties of the peculiar Type Ia SN~1991bg. Analysis and discussion of two years of observations
M. Turatto, S. Benetti, E. Cappellaro +5
Observations of the peculiar type Ia SN~1991bg in NGC~4374 collected at ESO--La Silla and Asiago are presented and discussed. The broad--band light curves in the early months have…