2008CBET.1368....1B

S. Blondin, Harvard-Smithsonian Center for Astrophysics (CfA), on behalf of the CfA Supernova Group, reports that a spectrum (range 350-740 nm) of 2008cg (cf. CBET 1366), obtained on May 8.34 UT by M. Calkins with the F. L. Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a type-IIn supernova. Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) indicates that 2008cg is most similar to a spectrum of the type-IIn supernova 1999Z taken on 1999 Feb. 9. The spectrum consists of a flat continuum and emission lines of the Balmer series, with a narrow component of about 300 km/s (FWHM for H_alpha) superposed on a weaker and broader component of about 1500 km/s (FWHM for H_alpha).