2012CBET.3077....2C

E. Cappellaro, A. Pastorello, L. Tomasella, S. Benetti, M. Fiaschi, P. Ochner, M. Turatto, and S. Valenti, Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica, report that a spectrogram of PSN J13054566+4627529 = SN 2012bm, obtained on Mar. 28.05 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC; range 340-820 nm; resolution 2.4 nm), suggests that it is a reddened type-Ia supernova. Adopting for the host galaxy a redshift z = 0.0248 (SDSS 2005, via NED), and assuming a color excess E(B-V) = 0.5 mag, the comparison with a library of supernovae spectra via GELATO (Harutyuyan et al. 2008, A.Ap. 488, 383) shows that 2012bm is a type-Ia event similar to SN 1994D (Patat et al. 1996, MNRAS 278, 111) at about one week before the B-band maximum light. The expansion velocity, deduced from the Si II 635.5-nm minimum, is about 11200 km/s.