[IAUC] CBET 2457: 20100916 : SUPERNOVA 2010hc IN ESO 339-6

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                                                  Electronic Telegram No. 2457
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
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SUPERNOVA 2010hc IN ESO 339-6
     N. Morrell, Las Campanas Observatory, Carnegie Supernova Project; and
I. Botti and P. Lopez, Universidad de Chile, write that they obtained a
spectrogram (range 360-920 nm) of 2010hc (cf. CBET 2429) on Sept. 14.0 UT
with the Las Campanas 2.5-m du Pont telescope (+ WFCCD), which shows that
2010hc is an evolved type-Ib supernova.  Cross-correlation with a library of
supernova spectra using the Supernova Identification tool (SNID; Blondin
and Tonry, 2007, Ap.J. 666, 1024) suggests for 2010hc a IIb subtype and
an age of roughly two months past explosion, with a best match to SN 1993J at
62 days after explosion.  From prominent H-alpha emission of an underlying
H II region present in the supernova spectrum, a heliocentric redshift of
6064 km/s is computed, in excellent agreement with that derived by SNID.


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                         (C) Copyright 2010 CBAT
2010 September 16                (CBET 2457)              Daniel W. E. Green