[IAUC] CBET 1368: 20080508 : SUPERNOVA 2008cg

[IAUC mailing list]

                                                  Electronic Telegram No. 1368
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html


SUPERNOVA 2008cg
     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).


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2008 CBAT
2008 May 8                       (CBET 1368)              Daniel W. E. Green