Time-domain science has undergone a revolution over the past decade, with tens of
thousands of new supernovae (SNe) discovered each year. However, several observational …

It is 30 years since the characteristic signatures of interaction with circumstellar material
(CSM) were first observed in a core-collapse supernova. Since then, CSM interaction has …

ABSTRACT We present Hubble Space Telescope imaging of a pre-explosion counterpart to
SN 2019yvr obtained 2.6 yr before its explosion as a type Ib supernova (SN Ib). Aligning to a …

The modern study of astrophysical transients has been transformed by an exponentially
growing volume of data. Within the last decade, the transient discovery rate has increased …

We present the discovery of the radio afterglow and near-infrared (NIR) counterpart of the
Swift short gamma-ray burst (GRB) GRB 200522A, located at a small projected offset of≈ 1 …

We present an exquisite 30 minute cadence Kepler (K2) light curve of the Type Ia supernova
(SN Ia) 2018oh (ASASSN-18bt), starting weeks before explosion, covering the moment of …

I review studies of core collapse supernovae (CCSNe) and similar transient events that
attribute major roles to jets in powering most CCSNe and in shaping their ejecta. I start with …

ABSTRACT We present new Hubble Space Telescope (HST) imaging photometry for the
site of the Type IIn supernova (SN) 2009ip taken almost a decade after explosion. The …

We present high-cadence optical, ultraviolet (UV), and near-infrared data of the nearby (D≈
23 Mpc) Type II supernova (SN) 2021yja. Many Type II SNe show signs of interaction with …

We present panchromatic observations and modeling of the Calcium-rich supernova (SN)
2019ehk in the star-forming galaxy M100 (d≈ 16.2 Mpc) starting 10 hr after explosion and …