[IAUC] CBET 969: 20070522 : SUPERNOVA 2007cj IN IC 2531

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                                                  Electronic Telegram No. 969
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVA 2007cj IN IC 2531
     S. Blondin, M. Modjaz, R. Kirshner, and P. Challis, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 360-940 nm) of the
possible supernova reported on CBET 968, obtained on May 21.05 UT by M. A.
P. Torres and J. Steiner with the Magellan Clay 6.5-m telescope (+ LDSS3),
shows it to be a reddened type-Ia supernova around one month past maximum
light.  Cross-correlation with a library of supernova spectra indicates that
SN 2007cj is most similar to the type-Ia supernova 2002bo at 29 days past
maximum light.  Also, interstellar Na I D absorption at the redshift of the
host galaxy is visible in the spectrum with an equivalent width of 0.2 nm.


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                         (C) Copyright 2007 CBAT
2007 May 22                      (CBET 969)               Daniel W. E. Green