Supernova 1992an in Anonymous Galaxy
Abstract
J. Maza, University of Chile; and M. Hamuy, Cerro Tololo Interamerican Observatory, report the discovery by R. Antezana ( University of Chile) of a supernova (mpg about 18) located about 6".5 east and 5".5 north of the nucleus of a spiral galaxy at R.A. = 13h34m59s, Decl. = -30 26'.2 (equinox 1950.0). The supernova was found on a 20-min unfiltered IIa-O plate taken by L. Wells and C. Muena (CTIO) with the CTIO Curtis Schmidt telescope on July 26.021 UT. Confirmation was made by N. Tyson (Princeton University) and R. Gal (Columbia University) on B and V images obtained on July 30.02 with the CTIO 0.9-m telescope. On July 29.01, M. Phillips (CTIO) and A. Alonso (Columbia University) used the CTIO 4-m telescope to obtain a spectrogram (range 320.0-750.0 nm) that shows this object to be a peculiar type-II supernova with narrow (FWHM about 900 km/s) H-alpha, H-beta, and H-gamma emission lines atop an essentially featureless continuum. The redshift of the H-alpha and H-beta lines is 0.051.
- Publication:
-
International Astronomical Union Circular
- Pub Date:
- July 1992
- Bibcode:
- 1992IAUC.5571....1M