Electronic Telegram No. 274
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)
URL http://cfa-www.harvard.edu/iau/cbat.html


SUPERNOVA 2005io IN UGC 3361
     A. V. Filippenko and R. J. Foley, University of California,
Berkeley, report that inspection of CCD spectra (range 330-920 nm),
obtained on Nov. 5 UT with the Keck I 10-m telescope (+ LRIS), shows
that SN 2005io (CBET 273) is of type II, shortly after the explosion.
The broad hydrogen Balmer lines exhibit P-Cyg profiles, but in the
case of H-alpha the emission component greatly dominates over the
absorption component.  The continuum is very blue, and He I 587-nm
absorption is present.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2005 CBAT
2005 November 5                  (CBET 274)               Daniel W. E. Green