SN 1991F in NGC 3458: A peculiar type IA supernova?
Supernova 1991F appeared in the lenticular galaxy NGC 3458 (UGC 6037). On discovery, it was classified as type I, although no subtype (i.e., Ia or Ib/c) was...
We present VRIJHK photometry, and optical and near-infrared spectroscopy, of the heavily extinguished Type Ia supernova (SN Ia) 2002cv, located in NGC 3190...
SN 2012aa: A transient between Type Ibc core-collapse and superluminous supernovae
Context. Research on supernovae (SNe) over the past decade has confirmed that there is a distinct class of events which are much more luminous (by 2 mag) than...
SN 2014J at M82 - I. A middle-class Type Ia supernova by all spectroscopic metrics
We present the intensive spectroscopic follow up of the Type Ia supernova (SN Ia) 2014J in the starburst galaxy M82. Twenty-seven optical spectra have been...
SN 2020pvb: A Type IIn-P supernova with a precursor outburst
We present photometric and spectroscopic datasets for SN 2020pvb, a Type IIn-P supernova (SN) that is similar to SNe 1994W, 2005cl, 2009kn, and 2011ht, with a...
SN 2024bfu, SN 2025qe, and the early light curves of type Iax supernovae
Type Iax supernovae (SNe Iax) are one of the most common subclasses of thermonuclear supernova and yet their sample size, particularly those observed shortly...
SN 2025coe: A Multiple-peaked Calcium-strong Transient from a White-dwarf Progenitor
SN 2025coe is a calcium-strong transient located at an extremely large projected offset ∼39.3 kpc from the center of its host, the nearby early-type galaxy NGC...
SNhunt151: an explosive event inside a dense cocoon
SNhunt151 was initially classified as a supernova (SN) impostor (nonterminal outburst of a massive star). It exhibited a slow increase in luminosity, lasting...
Spectral evolution of the He-Poor supernovae 1990U in NGC 7479 and 1991A in IC 2973
We present the spectral evolution, from about one to six months after optical maximum, of two type Ic supernovae, 1990U in NGC 7479 and 1991A in IC 2973 (UGC...