[IAUC] CBET 751: 20061122 : SUPERNOVA 2006os IN UGC 2384

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                                                  Electronic Telegram No. 751
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 2006os IN UGC 2384
     Further to IAUC 8622, R. Quimby and F. Castro, University of Texas,
report the discovery of a supernova (mag about 17.2) on unfiltered CCD
images taken on Nov 21.18 UT using the 0.45-m ROTSE-IIIb telescope at the
McDonald Observatory.  SN 2006os is located at R.A. = 2h55m01s.01, Decl. =
+16o00'34".8 (equinox 2000.0), which is 6".2 east and 10".4 south of the
center of UGC 2384 (catalogued redshift of z = 0.033 from Huchra et al.
1999, Ap.J. Suppl. 121, 287, via NED).  A spectrum (range 420-890 nm),
obtained on Nov. 22.15 with the 9.2-m Hobby-Eberly Telescope (+ Marcario
Low-Resolution Spectrograph) by H. Edelmann and V. Riley, shows 2006os to
be a type-Ia supernova.  The spectrum is similar to that of SN 1992A
around maximum light.  Adopting the above host-galaxy redshift, the
expansion velocity derived from the minimum of the Si II 635.5-nm feature
is 12700 km/s.  A narrow absorption line consistent with Na I D in the
UGC 2384 rest frame suggests some absorption from within the host.


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                         (C) Copyright 2006 CBAT
2006 November 22                 (CBET 751)               Daniel W. E. Green