In this paper, I present a general discussion of several astrophysical processes likely to play
a role in the production of non-thermal emission in massive stars, with emphasis on massive …

Massive stars end their short lives in spectacular explosions—supernovae—that synthesize
new elements and drive galaxy evolution. Historically, supernovae were discovered mainly …

We present detailed submillimeter—through centimeter—wave observations of the
extraordinary extragalactic transient AT2018cow. The apparent characteristics—the high …

Long duration γ-ray bursts (GRBs) mark the explosive death of some massive stars and are
a rare sub-class of type Ibc supernovae. They are distinguished by the production of an …

We present late-time radio observations of 68 local Type Ibc supernovae, including six
events with broad optical absorption lines (" hypernovae"). None of these objects exhibit …

ABSTRACT The intermediate Palomar Transient Factory reports our discovery of a young
supernova, iPTF13bvn, in the nearby galaxy, NGC 5806 (22.5 Mpc). Our spectral sequence …

Massive systems made of two or more stars are known to be the site for interesting physical
processes–including at least in some cases–particle acceleration. Over the past decade, this …

We report extensive radio and X-ray observations of SN 2003bg, whose spectroscopic
evolution shows a transition from a broad-lined Type Ic to a hydrogen-rich Type II, and later …

We report the discovery and detailed monitoring of X-ray emission associated with the Type
IIb SN 2011dh using data from the Swift and Chandra satellites, placing it among the best …

We present the discovery, classification, and extensive panchromatic (from radio to X-ray)
follow-up observations of PTF11qcj, a supernova (SN) discovered by the Palomar Transient …