We present a search for extragalactic fast blue optical transients (FBOTs) during Phase I of
the Zwicky Transient Facility (ZTF). We identify 38 candidates with durations above half …

We present the results from our 7 yr long broadband X-ray observing campaign of SN
2014C with Chandra and NuSTAR. These coordinated observations represent the first look …

I present the effervescent zone model to account for the compact dense circumstellar
material (CSM) around the progenitor of the core collapse supernova (CCSN) SN 2023ixf …

This work examines the relationships between the properties (flux ratios, full width at half-
maximum velocities) of the [O i] λλ6300, 6364,[Ca ii] λλ7291, 7323, and the Ca ii near …

We present the discovery and extensive follow-up observations of SN 2020jfo, a Type IIP
supernova (SN) in the nearby (14.5 Mpc) galaxy M 61. Optical light curves (LCs) and spectra …

We present extensive multifrequency Karl G. Jansky Very Large Array (VLA) and Very Long
Baseline Array (VLBA) observations of the radio-bright supernova (SN) IIb SN 2004C that …

We present photometric and spectroscopic observations of SN 2020bio, a double-peaked
Type IIb supernova (SN) discovered within a day of explosion, primarily obtained by Las …

We present the results from a high-cadence, multiwavelength observation campaign of AT
2016jbu (aka Gaia16cfr), an interacting transient. This data set complements the current …

I propose a scenario according to which the dense compact circumstellar matter (CSM) that
the ejecta of many core-collapse supernovae (CCSNe) collide with within several days after …

Context. Luminous blue variable stars (LBVs) are massive evolved stars that suffer sporadic
and violent mass-loss events. They have been proposed as the progenitors of some core …