Central Bureau for Astronomical Telegrams

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IAUC 8384: 2004dq; 2004dr; 2004dj

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                                                  Circular No. 8384
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 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  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


SUPERNOVA 2004dq
     T. Boles, Coddenham, England, reports the discovery of an
apparent supernova (mag 18.5) on unfiltered CCD images taken on
June 27.929 and 28.942 UT with a 0.35-m reflector.  The new object
is located at R.A. = 15h44m46s.84, Decl. = +22o50'22".9, which is
approximately 4".9 east and 4".8 north of the center of its
apparent host galaxy; measurement by Boles of Sloan-r' images taken
by M. Bode, J. Marchant, and A. Newsam on Aug. 9.959 with the 2-m
Liverpool telescope at La Palma yields position end figures 46s.89,
23".0 (and mag about 18.3) for SN 2004dq.  The new object is not
present on Boles' images taken on 2004 Mar. 20 and May 18 (limiting
mag 19.5) and on Digitized Sky Survey images (limiting red mag
22.0; limiting blue mag 21.5).


SUPERNOVA 2004dr IN ESO 479-G42
     Further to IAUC 8381, J. Graham and W. Li report the LOSS
discovery of an apparent supernova (mag about 17.5) on unfiltered
KAIT images taken on Aug. 9.45 and 10.47 UT.  The new object was
also marginally detected on an earlier image taken on July 30.44
(limiting mag about 18.5).  SN 2004dr is located at R.A. =
2h46m53s.97, Decl. = -22o38'15".0 (equinox 2000.0), which is 7".7
east and 31".6 north of the nucleus of ESO 479-G42.  A KAIT image
taken on Jan. 20.21 showed nothing at this position (limiting mag
about 19.0).


SUPERNOVA 2004dj IN NGC 2403
     E. W. Guenther and S. Klose, Thueringer Landessternwarte,
Tautenburg (TLT), report that observations of SN 2004dj, obtained
with the Tautenburg 2-m telescope (+ high-resolution echelle
spectrograph) on Aug. 4.08 and 5.06 UT, reveal Na I D lines in NGC
2403 with a heliocentric velocity of 164.8 +/- 0.1 km/s (each with
equivalent width 0.092 +/- 0.005 Angstroem).  Following Munari and
Zwitter (1997, A.Ap. 318, 269), this corresponds to E(B-V) = 0.026
+/- 0.002 mag of line-of-sight reddening in the host.
     K. Weis and D. J. Bomans, Astronomisches Institut, Ruhr-
Universitaet, Bochum; and S. Klose, TLT, report identification of
the potential progenitor of SN 2004dj (IAUC 8377, 8378, 8379) as an
H_alpha-bright, pointlike source on CCD images taken with the
Tautenburg 2-m telescope in April 2003.  The position of this
source is consistent with that of the luminous-blue-variable
candidate 7-3909 identified by F. Spiller (1992, Ph.D. thesis,
Heidelberg) at R.A. = 7h37m16s.93, Decl. = +65o35'57".6 (equinox
2000.0), with V = 18.9, based on Calar Alto 3.5-m telescope data
taken in February 1990.

                      (C) Copyright 2004 CBAT
2004 August 10                 (8384)            Daniel W. E. Green

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