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IAUC 5736: 1993J in NGC 3031; 1993K

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                                                  Circular No. 5736
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505
MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)


SUPERNOVA 1993J in NGC 3031
     Spectrograms obtained with the 1.93-m Observatoire de Haute Provence
telescope by Y. Andrillat on Mar. 30.95 UT showed no feature in the
region of the near-infrared Ca II triplet.  On Mar. 31.00 H alpha was
detected in emission with an equivalent width of 0.03 nm and a FWHM of
190 km/s.

     CCD photometry by P. Prugniel at the 0.8-m Observatoire de Haute
Provence telescope on Mar. 31.00 UT gave B = 11.05, B-R = +0.3.

     J.-M. Perelmuter, Observatoire du Mont Megantic, Universite de
Montreal, notes the presence on Canada-France-Hawaii Telescope 1980
plates and Kitt Peak National Observatory 1990 CCD images of an object
within 0".2 of the position of SN 1993J quoted by Hartwick et al.
on IAUC 5731.  The object appears stellar on images with FWHM as small
as 1".0 and had V = 20.0, B-V = +1.1, V-R = +0.7 (uncertainty 0.1 mag)
in Mar. 1990.

     Visual magnitude estimates: Mar. 30.94 UT, 10.5 (J. D. Shanklin,
Cambridge, England); 31.1, 10 (R. Kohl, Lakewood, NY; independent
discovery); 31.13, 10.5 (F. Cianciolo, R. Gearhart and A. Dosaj,
Austin, TX).


SUPERNOVA 1993K IN NGC 2223
     M. Della Valle, European Southern Observatory; and J. M. Alcala,
Landessternwarte, Heidelberg, report: "Analysis of a spectrogram
(range 480-710 nm, resolution about 0.5 nm) obtained with the 1.52-m
telescope at La Silla on Mar. 31.0 UT shows a featureless blue continuum,
indicating a possible type II supernova caught during an early stage."

     G. Massone, Osservatorio di Torino, reports the following magnitudes,
obtained on Mar. 31.1 UT with the 0.9-m Dutch telescope at La Silla:
V = 15.3, B-V = +0.1, V-R = +0.2.

     P. C. Schmidtke, Arizona State University, provides further
BVRI photometry with the 0.9-m telescope at the Cerro Tololo
Interamerican Observatory.  Quick-look estimates, starting on
Mar. 31.12 UT, gave V = 15.3, B-V = +0.2, V-R = +0.2 (uncertainty 0.1 mag).


1993 March 31                  (5736)              Brian G. Marsden

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