[IAUC] CBET 1887: 20090728 : SUPERNOVA 2009hn IN UGC 2005

[IAUC mailing list]

                                                  Electronic Telegram No. 1887
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 2009hn IN UGC 2005
     N. Morrell, on behalf of the Carnegie Supernova Project, reports a
spectroscopic observation (range 353-670 nm) of 2009hn (cf. CBET 1886)
obtained on July 26.4 UT with the Las Campanas 2.5-m du Pont telescope (+
Boller and Chivens spectrograph), which shows this to be an evolved type-Ia
supernova.  Adopting for UGC 2005 the NED redshift of 6609 km/s (Mahdavi and
Geller 2004, Ap.J. 607, 202), cross-correlation with a library of supernova
spectra via the Supernova Identification tool (Blondin and Tonry 2007, Ap.J.
666, 1024) provides a nearly perfect match to the spectrum of SN 1994ae (cf.
IAUC 6105) at 64 days past maximum brightness, as well as very good matches
with other normal type-Ia supernovae between one and two months 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      superseded by text appearing later in the printed IAU Circulars.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 July 28                     (CBET 1887)              Daniel W. E. Green