The underluminous Type Ia supernova 2005bl and the class of objects similar to SN 1991bg★
The underluminous Type Ia supernova 2005bl and the class of objects similar to SN 1991bg★
Optical observations of the Type Ia supernova (SN Ia) 2005bl in NGC 4070, obtained from -6 to +66 d with respect to the B-band maximum, are presented.The photometric evolution is characterized by rapidly declining light curves [ m 15 (B) true = 1.93] and red colours at peak and soon …