2008CBET.1420....1F

A. V. Filippenko, J. M. Silverman, R. Mostardi, and C. V. Griffith, University of California, Berkeley, report that inspection of a CCD spectrum (range 330-1000 nm), obtained on June 29 UT with the 3-m Shane reflector (+ Kast) at Lick Observatory, shows that the type-IIn supernova 2008cg (CBETs 1366, 1368) is very similar to supernovae 1997cy, 1999E, 2002ic, and 2005gj at a few months after the outbursts. It has been proposed that such objects are the result of a type-Ia supernova exploding within a dense circumstellar envelope (Hamuy et al. 2003, Nature 424, 651; Aldering et al. 2006, Ap.J. 650, 510). Further observations over a range of wavelengths are urged.