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Early Ultraviolet, Optical and X-Ray Observations of the Type IIP SN 2005cs in M51 with Swift
Peter J. Brown, Luc Dessart, Stephen T. Holland +14
We report early photospheric-phase observations of the Type IIP Supernova (SN) 2005cs obtained by Swift's Ultraviolet-Optical and X-Ray Telescopes. Observations started within two…
Asymmetric Explosion of Type Ia Supernovae as Seen from Near Infrared Observations
K. Motohara, K. Maeda, C. L. Gerardy +8
We present near-infrared spectra of late phase (>200 d) Type Ia supernovae (SNe Ia) taken at the Subaru telescope. The [Fe II] line of SN 2003hv shows a clear flat-topped feature,…
Consistent estimates of (56)Ni yields for type Ia supernovae
Maximilian Stritzinger, Paolo Mazzali, Jesper Sollerman +1
We present (56)Ni mass estimates for seventeen well-observed type Ia supernovae determined by two independent methods. Estimates of the (56)Ni mass for each type Ia supernova are d…
Cosmological Implications of the Second Parameter of Type Ia Supernovae
Philipp Podsiadlowski, Paolo A. Mazzali, Pierre Lesaffre +2
Theoretical models predict that the initial metallicity of the progenitor of a Type Ia supernova (SN Ia) affects the peak of the supernova light curve. This can cause a deviation f…
X-Ray Observations of Type Ia Supernovae with Swift: Evidence for Circumstellar Interaction for SN 2005ke
S. Immler, P. J. Brown, P. Milne +15
We present a study of the early (days to weeks) X-ray and UV properties of eight Type Ia supernovae (SNe Ia) which have been extensively observed with the X-Ray Telescope (XRT) and…
SN 2005cs in M51 I. The first month of evolution of a subluminous SN II plateau
A. Pastorello, D. Sauer, S. Taubenberger +16
Early time optical observations of supernova (SN) 2005cs in the Whirlpool Galaxy (M51), are reported. Photometric data suggest that SN 2005cs is a moderately under-luminous Type II…
The GRB 060218/SN 2006aj event in the context of other Gamma-Ray Burst Supernovae
P. Ferrero, D. A. Kann, A. Zeh +15
The supernova SN 2006aj associated with GRB 060218 is the second-closest GRB-SN observed to date (z=0.033). We present Very Large Telescope, Liverpool Telescope, and Katzman Automa…
The properties of the "standard" type Ic supernova 1994I from spectral models
D. N. Sauer, P. A. Mazzali, J. Deng +3
The properties of the type Ic supernova SN 1994I are re-investigated. This object is often referred to as a "standard SN Ic" although it exhibited an extremely fast light curve and…
The (54Fe+58Ni)/56Ni ratio as a second parameter for Type Ia supernova properties
Paolo A. Mazzali, Philipp Podsiadlowski
A variation of the relative content of (54Fe+58Ni) versus 56Ni may be responsible for the observed scatter of Type Ia Supernovae (SNe Ia) about a mean relation between their intrin…
Exploring the spectroscopic diversity of Type Ia Supernovae
S. Hachinger, P. A. Mazzali, S. Benetti
The velocities and equivalent widths (EWs) of a set of absorption features are measured for a sample of 28 well-observed Type Ia supernovae (SN Ia) covering a wide range of propert…
Anomalous extinction behaviour towards the Type Ia SN 2003cg
N. Elias-Rosa, S. Benetti, E. Cappellaro +14
We present optical and near-infrared photometry and spectroscopy of the Type Ia SN 2003cg, which exploded in the nearby galaxy NGC 3169. The observations cover a period between -8.…
Models for the Type Ic Hypernova SN 2003lw associated with GRB 031203
Paolo A. Mazzali, Jinsong Deng, Elena Pian +10
The Gamma-Ray Burst 031203 at a redshift z=0.1055 revealed a highly reddened Type Ic Supernova, SN 2003lw, in its afterglow light. This is the third well established case of a link…
A neutron-star-driven X-ray flash associated with supernova SN 2006aj
Paolo A. Mazzali, Jinsong Deng, Ken'ichi Nomoto +6
Supernovae connected with long-duration gamma-ray bursts (GRBs) are hyper-energetic explosion resulting from the collapse of very massive stars (about 40Mo, where Mo is the mass of…
An optical supernova associated with the X-ray flash XRF 060218
E. Pian, P. A. Mazzali, N. Masetti +42
Long-duration gamma-ray bursts (GRBs) are associated with type Ic supernovae that are more luminous than average and that eject material at very high velocities. Less-luminous supe…