Light curves and characteristics of recent supernovae.
Abstract
Summary. For the following supernovae: 197O-g in NGC5457=M101, 1972 in NGC3l47, I972-r in NGC 2841, 1972 in NGC 4254= M 99, photographic observations in B and V have been carried out at Asiago. For SN 197O-g U plates and spectra have also been obtained. The epoch and brightness of maximum are deduced, and the membership to type I or II is discussed. The supernovae in NGC 5457 and in NGC 4254, both of type II, show a close resemblance to the SN 1969-1 in NGC 1058, suggesting that a group of SN-lI share similar properties. Key words: supernovae - galaxies - photometry - spectroscopy
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- November 1973
- Bibcode:
- 1973A&A....29...57B