Electronic Telegram No. 256
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


SUPERNOVAE 2005gl AND 2005gm
     The "Nearby Supernova Factory" group (N. Blanc, S. Bongard, Y.
Copin, E. Gangler, L. Sauge, and G. Smadja, Institut de Physique
Nucleaire de Lyon; P. Antilogus, G. Garavini, S. Gilles, R. Pain,
and R. Pereira, Laboratoire de Physique Nucleaire et de Haute Energies
de Paris; G. Aldering, S. Bailey, D. Kocevski, B. C. Lee, S. Loken,
P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang, and B. A.
Weaver, Lawrence Berkeley National Laboratory; C. Bonnaud and E.
Pecontal, Centre de Recherche Astronomique de Lyon; R. Kessler,
Kavli Institute for Cosmological Physics, Chicago; and C. Baltay, D.
Rabinowitz, and A. Bauer, Yale University) reports that a spectrum
(range 320-1000 nm) of SN 2005gl (cf. IAUC 8615), obtained on Oct. 13.5
UT with the Supernova Integral Field Spectrograph (SNIFS) on the
University of Hawaii 2.2-m telescope, shows it to be a type-IIn
supernova at a redshift of z = 0.016, consistent with that of the host
galaxy NGC 266 (Huchra et al. 1999, Ap.J. Suppl. 121, 287, via NED).
A spectrum of SN 2005gm (IAUC 8616), also obtained on Oct. 13.5 with
SNIFS, reveals that it is a type-II supernova at an approximate
redshift of z = 0.02, consistent with that of the host galaxy NGC 1423
(Theureau et al. 2005, A.Ap. 430, 373, via NED); the spectrum is
well-developed, exhibiting H-alpha, He I 587.6-nm features, and the
Ca II infrared triplet in emission.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2005 CBAT
2005 October 15                  (CBET 256)               Daniel W. E. Green