Central Bureau for Astronomical Telegrams

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IAUC 8397: 2004ed; 2002 CE_26; 2004dj

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                                                  Circular No. 8397
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 2004ed IN NGC 6786
     M. Armstrong (cf. IAUC 8376) and T. Boles (cf. IAUC 8396)
independently report the discovery of an apparent supernova on
unfiltered CCD images.  SN 2004ed is located at R.A. = 19h10m53s.62,
Decl. = +73o24'27".6 (equinox 2000.0), which is approximately 1".8
west and 9".8 south of the center of NGC 6786, according to
Armstrong, who adds that nothing is visible at this position on
Palomar Sky Survey images from 1993 (limiting red mag 20.8) and
1992 (limiting blue mag 22.5).  Boles provides position end figures
53s.72, 27".0.  Available magnitudes:  2002 July 21, [19.5
(Armstrong); 2004 June 17, [19.5 (Armstrong); July 16, [19.5
(Boles); Sept. 2.980 UT, 17.4 (Armstrong); 3.849, 17.4 (Armstrong);
3.886, 17.5 (Boles).


2002 CE_26
     M. K. Shepard and J. Schlieder, Bloomsburg University of
Pennsylvania; M. C. Nolan and A. A. Hine, National Astronomy and
Ionosphere Center; and L. A. M. Benner, S. J. Ostro, and J. D.
Giorgini, Jet Propulsion Laboratory, report: "Arecibo delay-Doppler
radar images (2380 MHz, 12.6 cm) obtained on Aug. 30-31 show that
2002 CE_26 is a binary system.  Preliminary estimates of average
diameters, based on range estimates at 75-m resolution, are 3 and
0.2 km.  The orbit was seen at approximately superior conjunction
at Aug. 30.076 UT and inferior conjunction at Aug. 31.052.  The
average orbital radius, based on these and Doppler-bandwidth
observations, is 5 km.  Preliminary estimates, based on apparent
motion of the satellite in range, indicate an orbital period of
approximately 16 hours."


SUPERNOVA 2004dj IN NGC 2403
     P. Chandra and A. Ray, Tata Institute of Fundamental Research,
Mumbai, report the detection of radio emission from SN 2004dj with
the Giant Metrewave Radio Telescope (GMRT) in the L band on Aug. 12
and 22.  The flux density on Aug. 12 at the center frequency of
1390 MHz was 300 +/- 85 microJy, which grew to 900 +/- 105 microJy
by Aug. 22.  On Aug. 22, SN 2004dj remained undetected in the GMRT
1060-MHz band up to a 3-sigma limit of 350 microJy.  Total
bandwidths of 32 MHz were used at both frequencies for each
observation.  GMRT observations in the L band are continuing.
     CCD R magnitudes by K. Hornoch, Lelekovice, Czech Rep.:  Aug.
4.047, 11.55 (poor sky conditions); 10.072, 11.60; 16.076, 11.60;
19.042, 11.59; 23.029, 11.61; 28.985, 11.64.

                      (C) Copyright 2004 CBAT
2004 September 4               (8397)            Daniel W. E. Green

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