[IAUC] CBET 1640: 20081231 : SUPERNOVAE 2008im AND 2008io

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                                                  Electronic Telegram No. 1640
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVAE 2008im AND 2008io
     P. Challis, Harvard-Smithsonian Center for Astrophysics (CfA), on behalf
of the CfA Supernova Group reports that a spectrum (range 320-850 nm) of
2008im (cf. CBET 1635), obtained on Dec. 29 UT by M. Calkins with the F. L.
Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a type-Ib
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 2008im is consistent with other type-Ib supernovae at
maximum light.  A spectrogram, obtained as above on Dec. 30 UT by P. Berlind,
shows 2008io (cf. CBET 1639) to be a type-Ia supernova; cross-correlation with
a library of supernova spectra, using the SNID code, indicates that 2008io is
a normal type-Ia supernova about 50 days past maximum light.


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                         (C) Copyright 2008 CBAT
2008 December 31                 (CBET 1640)              Daniel W. E. Green