Central Bureau for Astronomical Telegrams
IAUC 8377: 2004dj; 2004dk; 2004dl, 2004dm
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Circular No. 8377
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 2004dj IN NGC 2403
S. Nakano, Sumoto, Japan, reports the discovery by K. Itagaki,
Teppo-cho, Yamagata, Japan, of a bright supernova (mag 11.2,
roughly V) on at least ten unfiltered CCD frames taken around July
31.76 UT using a 0.60-m f/7 reflector. The new object is located
at R.A. = 7h37m17s.02, Decl. = +65o35'57".8 (equinox 2000.0), which
is roughly 160" east and 10" north of the nucleus of NGC 2403 (the
nucleus being difficult to define on his images). Additional CCD
magnitudes of SN 2004dj by Itagaki: 2002 Sept. 19, [18.5; Oct. 11,
[18.5; 2004 Aug. 1.45, 11.3. Visual magnitude estimates: Aug.
1.910, 11.5 (R. J. Bouma, Groningen, The Netherlands); 2.031, 11.5
(M. Lehky, Hradec Kralove, Czech Republic); 2.062, 11.5 (K. Hornoch,
Lelekovice, Czech Republic); 2.910, 11.6 (Bouma).
SUPERNOVA 2004dk IN NGC 6118
Further to IAUC 8375, J. Graham and W. Li report the LOSS
discovery, on an unfiltered KAIT image taken on Aug. 1.19 UT, of an
apparent supernova (mag about 17.6) located at R.A. = 16h21m48s.93,
Decl. = -2o16'17".3 (equinox 2000.0), which is 4".4 east and 43".5
north of the nucleus of NGC 6118. Additional approximate KAIT
magnitudes for SN 2004dk: July 25.20, [19.5; 27.19, [18.5; 29.21,
[18.0; 30.19, 18.6; 31.20, 18.0.
SUPERNOVAE 2004dl AND 2004dm
M. Riello, European Southern Observatory (ESO), reports
(together with G. Pignata, M. T. Botticella, F. Patat, S. Benetti,
E. Cappellaro, M. Turatto, and S. Valenti) the discovery of two
supernovae on CCD frames taken during a search performed with the
Max-Planck-Institut 2.2-m telescope (+ Wide Field Imager) at the
ESO.
SN 2004 UT R.A. (2000.0) Decl. R z Type
2004dl July 14 14 11 11.50 -12 02 36.9 21.2 0.250 Ia
2004dm July 14 22 43 21.36 -40 19 46.7 21.6 0.225 Ib
Nothing was visible at the above positions on reference images
taken with the same equipment in May 2004 and November 2001
(limiting mag R about 23.5). Spectroscopic observations (range
600-1100 nm), obtained on July 22 with the ESO 8.2-m ANTU
telescope (+ FORS2) show that, from a comparison with SNe 1992A and
2000H, the new objects appear both to be about 2 weeks past maximum
light.
(C) Copyright 2004 CBAT
2004 August 2 (8377) Daniel W. E. Green
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