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IAUC 8312: 2004az; 2004aw; 2004ay; 2002lu, 2002lv

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IAUC number

                                                  Circular No. 8312
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

SUPERNOVA 2004az IN UGC 6853
     Further to IAUC 8311, D. Singer and W. Li report the LOSS
discovery, on KAIT images taken on Mar. 21.32 and 23.39 UT, of an
apparent supernova (mag about 17.8) located at R.A. = 11h52m48s.22,
Decl. = +29o20'51".7 (equinox 2000.0), which is 11".9 east and
67".2 north of the nucleus of UGC 6853.  A KAIT image taken on Jan.
29.40 showed nothing at this position (limiting mag about 19.0).
     T. Matheson, P. Challis, and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 370-750 nm)
of SN 2004az, obtained by P. Berlind on Mar. 25.26 UT with the F.
L. Whipple Observatory 1.5-m telescope (+ FAST spectrograph), shows
it to be a type-Ia supernova several weeks past maximum brightness.

SUPERNOVA 2004aw IN NGC 3997
     S. Benetti, N. Elias-Rosa, G. Blanc, H. Navasardyan, M.
Turatto, and L. Zampieri, Osservatorio Astronomico di Padova; E.
Cappellaro, Osservatorio Astronomico di Capodimonte; and M. Pedani,
Telescopio Nazionale Galileo (TNG), on behalf of the ERTN (IAUC
7987), obtained a spectrum of SN 2004aw (cf. IAUC 8310, 8311) with
the TNG (+ Dolores; range 335-995 nm; resolution 1.4 nm) on Mar.
24.94 UT.  The supernova has now evolved to resemble the spectrum
of SN 1991T, a few days after maximum, and is therefore classified
as type Ia.  This also accounts for the fact that the narrow
interstellar absorption line seen in the supernova spectrum
indicates a reddening of E(B-V) about 0.30 in the host galaxy.  The
expansion velocity deduced from the Si-II 635.5-nm feature is about
12600 km/s.

SUPERNOVA 2004ay IN UGC 11255
     Matheson et al. add that a spectrum of SN 2004ay (cf. IAUC
8311), obtained by Berlind on Mar. 26.49 UT, shows it to be a
type-IIn supernova.

SUPERNOVAE 2002lu AND 2002lv
     Further to IAUC 8311, T. Schrabback adds that the data
analysis was done with D. Wuttke, H. Knuth, and J.-M. Miralles.

                      (C) Copyright 2004 CBAT
2004 March 26                  (8312)            Daniel W. E. Green

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