[IAUC] CBET 1824: 20090531 : SUPERNOVA 2009ev IN NGC 5026

[IAUC mailing list]

                                                  Electronic Telegram No. 1824
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 2009ev IN NGC 5026
     N. Morrell, on behalf of the Carnegie Supernova Project, reports that a
spectrum (range 340-960 nm) of 2009ev (cf. CBET 1814), obtained on May 31.20
UT with the du Pont 2.5-m telescope (+ Boller and Chivens spectrograph) at
Las Campanas Observatory, reveals this is a type-Ia supernova around maximum
brightness.  Adopting for NGC 5026 the NED redshift of 3549 km/s (de
Vaucouleurs et al. 1991, Third Reference Catalogue of Bright Galaxies, ver.
3.9) an expansion velocity of 11800 km/s is derived from the minimum of the
Si II 635.5-nm absorption in the supernova spectrum.  Cross correlation with
a library of supernova spectra using the Supernova Identification code (SNID;
Blondin and Tonry 2007, Ap. J. 666, 1024) yields excellent matches with a
number of normal type-Ia supernovae at ages ranging from 7 days before
maximum to 5 days after maximum light.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2009 CBAT
2009 May 31                      (CBET 1824)              Daniel W. E. Green