Merging neutron stars offer an excellent laboratory for simultaneously studying strong-field
gravity and matter in extreme environments. We establish the physical association of an …

JCW had long wanted to write a new monograph on supernovae. Despite an immense
explosion in the literature and many review articles, there had not been one since that of …

We present observations of PS16dtm (also known as SN 2016ezh), a luminous transient that
occurred at the nucleus of a narrow-line Seyfert 1 galaxy hosting a 10 6 M⊙ black hole. The …

We investigate line formation in gas that is outflowing and optically thick to electron
scattering, as may be expected following the tidal disruption of a star by a supermassive …

We present all X-ray and radio observations of the Type IIn supernova SN 2010jl. The X-ray
observations cover a period up to day 1500 with Chandra, XMM-Newton, NuSTAR, and …

In this paper we report the results of the first~ four years of spectroscopic and photometric
monitoring of the Type IIn supernova SN 2015da (also known as PSN J13522411+ …

We present multiwavelength observations of supernova (SN) 2017hcc with the Chandra X-
ray telescope and the X-ray telescope onboard Swift (Swift-XRT) in X-ray bands, with the …

In this study we present the results of a five-year follow-up campaign of the long-lived type
IIn supernova SN 2017hcc, found in a spiral dwarf host of near-solar metallicity. The long …

We present simultaneous optical and near-infrared spectra obtained during the 2021
outburst of the black hole transient 4U 1543–47. The X-ray hardness-intensity diagram and …

We consider the effect of electron scattering on lines emitted as a result of supernova
interaction with a circumstellar medium, assuming that the scattering occurs in ionized gas in …