Electronic Telegram No. 1934
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
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SUPERNOVA 2009im IN NGC 1355
     K. Ayani, Bisei Astronomical Observatory (BAO); and H. Yamaoka, Kyushu
University, report that low-resolution spectra (range 400-750 nm; resolution
0.5 nm at H-alpha) of 2009im (cf. CBET 1925), obtained with the BAO 1.01-m
telescope on Aug. 31.8 UT, show that it is a type-Ia supernova around maximum.
The absorption minimum of the Si II 635.5-nm feature is blueshifted by about
11300 km/s, assuming the recession velocity of NGC 1355 to be 3978 km/s
(Maurogordato et al. 1991, A.Ap. 246, 39).  The rather prominent Si II 580-nm
feature implies that it is a somewhat-subluminous object.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2009 CBAT
2009 September 1                 (CBET 1934)              Daniel W. E. Green