Electronic Telegram No. 80
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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CBAT@CFA.HARVARD.EDU (science)
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SUPERNOVA 2004ei IN UGC 2817
     M. Modjaz, R. Kirshner and P. Challis, Harvard-Smithsonian Center for
Astrophysics; and T. Matheson, National Optical Astronomy Observatory,
report that a spectrum (range 350-740 nm) of SN 2004ei (cf. IAUC 8401),
obtained by P. Berlind on Sept. 11.43 UT with the F. L. Whipple
Observatory 1.5-m telescope (+ FAST), reveals it to be a type-II
supernova.  The spectrum consists of emission-dominated P-Cyg features of
H_alpha and possibly of H_beta, and a red continuum.  Adopting the NED
recession velocity of 5755 km/s for the host galaxy, the expansion
velocity derived from the minimum of the H_alpha line is about 6500 km/s.
Zero-velocity interstellar Na I D absorption with an equivalent width of
about 0.3 nm is detected in the spectrum of SN 2004ei, indicating gas along
the line of sight in our galaxy and thus suggesting reddening by dust.
Schlegel et al. (1998) estimate E(B-V) of 0.52 mag of Galactic reddening
along the line of sight to the host galaxy.


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                         (C) Copyright 2004 CBAT
2004 September 15                 (CBET 80)               Brian G. Marsden