[IAUC] CBET 1551: 20081023 : SUPERNOVA 2008gm IN NGC 7530

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                                                  Electronic Telegram No. 1551
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 2008gm IN NGC 7530
     E. Y. Hsiao, M. L. Graham, C. J. Pritchet, A. Parker, S. Sadavoy, and
D. Balam, Department of Physics and Astronomy, University of Victoria,
report that a spectrogram (range 390-703 nm, resolution 0.3 nm) of 2008gm
(cf. CBET 1549), obtained on Oct. 23.17 UT with the 1.82-m Plaskett
Telescope of the National Research Council of Canada, shows it to be a
type-Ib/c supernova about 1 month past maximum light.  Comparison with a
library of supernova spectra using the "superfit" matching program of
Howell et al. (2005, Ap.J. 634, 1190) indicates that 2008gm is most similar
to the peculiar type-Ib/c supernova 1997ef with a weighted average epoch of
30 days past maximum light.  The redshift derived from the fit is consistent
with the published redshift of NGC 7530 (v = 3517 km/s; Theureau et al.
2005, A.Ap. 430, 373).


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                         (C) Copyright 2008 CBAT
2008 October 23                  (CBET 1551)              Daniel W. E. Green