We present optical and near-infrared (NIR) observations of SN 2022crv, a stripped-envelope
supernova in NGC 3054, discovered within 12 hr of explosion by the Distance Less Than 40 …

Nitrogen is produced by CNO-cycling in massive stars, and can be ejected in significant
amounts in supernova explosions. While in H-rich SNe, its [N ii] 6548, 6583 emission …

Due to high-cadence automated surveys, we can now detect and classify supernovae (SNe)
within a few days after explosion, if not earlier. Early-time spectra of young SNe directly …

We present the long-term photometric and spectroscopic analysis of a transitioning SN
IIn/Ibn from− 10.8 d to 150.7 d post V-band maximum. SN 2021foa shows prominent He i …

I present a review of how late observations of supernovae, of the nebular phase, and much
later of supernova remnants (SNRs), and their analysis in 2023 made progress towards …

We present optical and near-infrared observations of SN~ 2022crv, a stripped envelope
supernova in NGC~ 3054, discovered within 12 hrs of explosion by the Distance Less Than …

We present the long-term photometric and spectroscopic analysis of a transitioning SN~
IIn/Ibn from $-$10.8 d to 150.7 d post $ V $-band maximum. SN~ 2021foa shows prominent …

In the last decade, time-domain surveys have dramatically enhanced our understanding of
stellar evolutionary pathways by providing accurate measurements of the physical …