PSN J08070669-2803101 is a young Type II supernova
ATel #4874; D. Milisavljevic, Harvard-Smithsonian Center for Astrophysics (CfA); R. Fesen, Dartmouth College; T. Pickering and A. Kniazev, South African Astronomical Observatory and Southern African Large Telescope; J. Parrent, Dartmouth College and Las Cumbres Observatory; Alicia Soderberg and Raffaella Margutti (CfA)
on 11 Mar 2013; 03:03 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: D. Milisavljevic (dmilisav@cfa.harvard.edu)
Subjects: Optical, Supernovae
Low-dispersion spectra (range 350-880 nm), obtained on March 10.9 UT with the 10-m SALT telescope (+ RSS), show PSN J08070669-2803101 to be a young type-II supernova not long after outburst. Fitting with the SYN++ software (Thomas et al. 2011, PASP, 123, 237) suggests that the broad P-Cyg features seen on a fairly blue continuum are associated with H_alpha, Na I, Ca II, and He I. Using a redshift of z = 0.0037 measured from narrow emission lines associated with a coincident H II region in the host galaxy ESO 430-020, we estimate the velocity of the H_alpha absorption feature to be approximately -18500 km/s. The spectra resemble those previously reported for the type-II 2012dy (CBET 3197) and the type-IIb 2011hs (CBET 2902), though in those objects the Fe II absorptions between 400 and 520 nm were stronger.
We note that given the nearby distance to ESO 430-020 and the substantial Galactic extinction in this direction (D ~ 12.7 Mpc; A_v = 1.25 mag; via NED), the currently reported unfiltered magnitude of 13.5 mag indicates a rather luminous extinction-corrected absolute magnitude of -18.3.
