ar X iv : a st ro - p h / 02 12 36 8 v 1 1 7 D ec 2 00 2 Evidence for Core Collapse in the Type Ib / c SN 1999 ex

ar X iv : a st ro - p h / 01 12 16 8 v 1 7 D ec 2 00 1 The Supernova - GRB Connection

We discuss the possible connection between supernova explosions (SN) and gamma-ray bursters (GRB) from the perspective of our current understanding of SN physics. Recent evidence strongly suggests that the explosion mechanism of core collapse SN is intrinsically aspherical. Typically, a neutron star is formed. However, the observed properties of the expanding SN envelopes remnants make these ob...

ar X iv : a st ro - p h / 04 02 26 4 v 1 11 F eb 2 00 4 The GRB - SN connection : GRB 030329 and XRF 030723

The attempt to secure conclusive, spectroscopic evidence for the GRB/SN connection has been a central theme in most GRB observing time proposals since the discovery of the very unusual GRB 980425 associated with the peculiar type Ib/c SN 1998bw. GRB 030329 provided this evidence to everybody’s satisfaction. In this contribution we show the results of a spectroscopic campaign of the supernova as...

ar X iv : a st ro - p h / 03 10 22 8 v 1 8 O ct 2 00 3 Optical , Ultraviolet , and Infrared Observations of SN 1993

We review the existing set of optical/UV/IR observations of Supernova 1993J, concentrating heavily on optical data because these are by far the most plentiful. Some results from theoretical modeling of the observations are also discussed. SN 1993J has provided the best observational evidence for the transformation of a SN from one spectral type to another, thereby providing a link between Type ...

ar X iv : a st ro - p h / 06 12 42 6 v 1 1 5 D ec 2 00 6 Heating and Cooling in the Perseus Cluster Core

ar X iv : a st ro - p h / 02 11 45 7 v 2 1 0 D ec 2 00 2 Time variation of fundamental constants : two phenomenological models

Time variation of fundamental constants, a strong signal of new physics, is analyzed comparing extant data with two phenomenological models. Results are discussed.