We present the densely sampled early light curve of the Type II supernova (SN) 2023ixf, first
observed within hours of explosion in the nearby Pinwheel Galaxy (Messier 101; 6.7 Mpc) …

We present a series of high-resolution echelle spectra of SN 2023ixf in M101, obtained
nightly during the first week or so after discovery using PEPSI on the Large Binocular …

Abstract The Ultraviolet Transient Astronomy Satellite (ULTRASAT) is scheduled to be
launched to geostationary orbit in 2027. It will carry a telescope with an unprecedentedly …

SN 2023ixf was discovered in M101 within a day of the explosion and rapidly classified as a
Type II supernova with flash features. Here we present ultraviolet (UV) spectra obtained with …

A large fraction of red-supergiant stars seem to be enshrouded by circumstellar material
(CSM) at the time of explosion. Relative to explosions in a vacuum, this CSM causes both a …

We present five far-and near-ultraviolet spectra of the Type II plateau supernova, SN
2022acko, obtained 5, 6, 7, 19, and 21 days after explosion, all observed with the Hubble …

We present high-cadence photometric and spectroscopic observations of SN 2023axu, a
classical Type II supernova with an absolute V-band peak magnitude of–17.2±0.1 mag. SN …

We present photometric, spectroscopic, and polarimetric observations of the intermediate-
luminosity Type IIP supernova (SN) 2021gmj from 1 to 386 d after the explosion. The peak …

We present comprehensive optical observations of SN 2021gmj, a Type II supernova (SN II)
discovered within a day of explosion by the Distance Less Than 40 Mpc survey. Follow-up …

We present high-cadence optical and ultraviolet (UV) observations of the Type II supernova
(SN), SN 2022jox which exhibits early spectroscopic high-ionization flash features of H i, He …