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IAUC 5950: 1994D; GRB 940301 AND GRB 930704; 1993c

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                                                  Circular No. 5950
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 1994D IN NGC 4526
     A. Walker, Cerro Tololo Interamerican Observatory, reports the
following preliminary data from CCD photometry obtained with the
CTIO 0.9-m telescope on Mar. 10.2 UT:  V = 13.66, B-V = -0.04, U-B
= -0.4, V-I = +0.04.
     Visual magnitude estimates:  Mar. 9.932 UT, 13.3 (H. Dahle,
Oslo, Norway); 10.885, 12.9 (O. Midtskogen, Tranby, Norway); 10.961,
12.5 (G. M. Hurst, Basingstoke, England); 11.548, 12.8 (Y. Sekino,
Kanagawa, Japan); 12.012, 12.4 (Hurst).


GRB 940301 AND GRB 930704
     J. M. Ryan, M. McConnell, R. M. Kippen, V. Schoenfelder, K.
Bennett, and W. Hermsen for COMPTEL; B. McNamara and T. E. Harrison,
New Mexico State University; and H. Pedersen, Copenhagen University
Observatory, write:  "The COMPTEL team reports the potential repeat
of a gamma-ray burst that occurred on 1993 July 4.70075 UT.  Based
on available data, the COMPTEL position of GRB 930704 is R.A. =
6h43m, Decl. = +62o.5, with a 2-sigma error box covering 28 degE2;
the coordinates of GRB 940301 (IAUC 5943, 5944) are R.A. = 6h50m,
Decl. = +63o.9, with a 2-sigma error box covering 3 degE2.  Without
accounting for differential sky exposure, the probability of a
28-degE2 overlap of burst positions is < 1 percent based on the low
number of imaged COMPTEL bursts.  Preliminary interplanetary annuli
(provided by K. Hurley) intersect inside the 2-sigma error boxes of
both bursts.  If both bursts are assumed to come from the same
source, the most likely position of the source, based solely on
COMPTEL data, is approximately that of GRB 940301, by virtue of
better statistics.  For reference, at the center of the combined
error boxes and annuli is the star SAOC 13977."


PERIODIC COMET TEMPEL 1 (1993c)
     Total visual magnitude estimates (cf. IAUC 5940):  Feb. 19.08
UT, 13.0 (G. Comello, Groningen, Netherlands, 0.18-m reflector);
Mar. 3.30, 12.5 (R. Keen, Mt. Thorodin, CO, 0.32-m reflector);
5.26, 13.4 (G. W. Kronk, Troy, IL, 0.33-m reflector); 6.22, 12.8
(Kronk); 10.29, 12.6 (A. Hale, near Orogrande, New Mexico, 0.41-m
reflector).


1994 March 12                  (5950)            Daniel W. E. Green

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