AstroNotes

We have obtained an optical spectrum of SN 2025ctp, which shows it to be a Type IIb supernova at maximum light. The supernova occurred in the same galaxy as the Type Ia supernova SN 2016ys.

We have obtained an optical spectrum of SN 2025gc, which shows it to be a Type Ic supernova exhibiting SN 1998bw-like features, about a month after maximum light. The supernova occurred in the same g…

We have obtained an optical spectrum of SN 2024wrc, showing it to be a reddened Type Ia supernova a few days after maximum light. This is the third Type Ia supernova in the same galaxy within 7 years.

We have obtained an optical spectrum of SN 2024tvi, which shows it to be a Type II supernova exhibiting narrow features about one and a half weeks after explosion.

We have obtained an optical spectrum of SN 2023zps, which shows it to be a Type II supernova about 20 days after explosion.

We have obtained an optical spectrum of SN 2021zoh, which shows it to be a normal Type Ia supernova a few days before the peak.

We have obtained optical spectra of SN 2021wxl, SN 2021wzr, and SN 2021xbg, which show them to be two Type II supernovae and one Type Ib/c supernova, respectively.

We have obtained an optical spectrum of SN 2021tgd, which shows it to be a Type Ia supernova close to maximum light.

We have obtained an optical spectrum of SN 2021szr, which shows it to be a Type Ia supernova.

We have obtained an optical spectrum of SN 2021rdc, which shows it to be a young Type II supernova about 10 days after explosion.

We have obtained optical spectra of SN 2021jom and SN 2021jwd, which show them to be young Type II supernovae approximately a week after explosion.

We have obtained an optical spectrum of SN 2021jpk, which shows it to be a Type Ibn supernova a few days before or at maximum.

We have obtained optical spectra of SN 2021inc and SN 2021jmg, which show them to be a young Type II supernova and a Type Ic supernova close to maximum, respectively.

We have obtained an optical spectrum of SN 2021ggl, which shows it to be a young Type Ia supernova.

We have obtained an optical spectrum of SN 2021fwa, which shows it to be a young Type II supernova.

We have obtained an optical spectrum of SN 2021crx, which shows it to be an unusually luminous member of the class of low-velocity Type II supernovae.

We have obtained an optical spectrum of SN 2021ckj, which shows it to be an unusual Type I supernova with narrow carbon and helium lines superimposed on a blue continuum with several broad spectral f…

We have obtained an optical spectrum of SN 2021cdw, which shows it to be a young Type II supernova.

We have obtained an optical spectrum of SN 2021amj, which shows it to be a young Type II supernova.

We have obtained an optical spectrum of SN 2021abi, which shows it to be a normal Type Ia supernova a few days before maximum light, at a redshift z~0.07.

We have obtained an optical spectrum of SN 2021pz, which shows it to be a young Type II supernova.

We have obtained an optical spectrum of SN 2020acug, which shows it to be a young Type II supernova.

We have obtained an optical spectrum of SN 2020acod, which shows it to be a normal Type Ia supernova 6 to 8 days before maximum brightness.

We have obtained an optical spectrum of SN 2020acei, which shows it to be a Type Ia supernova 4 to 6 days before maximum brightness.

We have obtained an optical spectrum of SN 2020acae, which shows it to be a normal Type Ia supernova close to maximum light.

We have obtained an optical spectrum of SN 2020abty, which shows it to be a young Type II supernova.

We have obtained an optical spectrum of SN 2020zia, which shows it to be a young Type II supernova.

We have obtained an optical spectrum of SN 2020yts, which shows it to be a young Type II supernova.

We have obtained an optical spectrum of SN 2020xlo, which shows it to be a young Type II supernova.

We have obtained an optical spectrum of SN 2020win, which shows it to be a 91T-like peculiar Type Ia supernova at, or a few days before, maximum brightness.

We have obtained an optical spectrum of SN 2020ver, which shows it to be a Type Ia supernova seven days before maximum brightness.

We have obtained an optical spectrum of SN 2020upe, which shows it to be a young Type II supernova.

We have obtained an optical spectrum of SN 2020uao, which shows it to be a young Type II supernova.

We have obtained optical spectra of SN 2020tug and SN 2020tly, which show them to be a young Type Ia supernova at redshift 0.05 and a young Type II supernova at redshift 0.058, respectively.

We have obtained an optical spectrum of SN 2020dbd, which shows it to be a young Type II supernova at redshift 0.042.

We have obtained an optical spectrum of SN 2020cye, which shows it to be a young Type II supernova at redshift 0.064.

We have obtained an optical spectrum of SN 2020bcv, which shows it to be a young Type II supernova at redshift 0.166.

We have obtained an optical spectrum of SN 2020ajd, which reveals it to be a Type Ic supernova past maximum light.

We have obtained an optical spectrum of SN 2020zs, which reveals it to be a Type II supernova.

We have obtained an optical spectrum of SN 2019wxt, which shows a blue continuum with weak, broad helium lines superimposed. The spectrum suggests SN 2019wxt to be a young SN Ib or IIb.

We have obtained an optical spectrum of SN 2019uxh, which reveals it to be a young Type II supernova.

We have obtained an optical spectrum of SN 2019tjt, which shows a mostly featureless, blue continuum with broad He II emission, characteristic of a young Type II supernova.

We have obtained an optical spectrum of SN 2019teo, which shows it to be a Type Ia supernova about a week before maximum light.