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IAUC 5752: 1993J; 1993e; 1993G

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                                                  Circular No. 5752
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
     K. W. Weiler, Naval Research Laboratory; R. A. Sramek, National
Radio Astronomy Observatory; S. D. Van Dyk, Naval Research Laboratory;
and N. Panagia, Space Telescope Science Institute, report:
"New observations of SN 1993J made on Apr. 2.30 UT with the Very
Large Array in 'B' configuration show a possible detection at
wavelength 1.3 cm (22.5 GHz) of a source with a flux density of 0.8 +/-
0.2 mJy at R.A. = 9h51m19s.032, Decl. = +69 15'26".47 (equinox
1950.0), near the reported optical position of the supernova (IAUC
5731, 5737).  It should be emphasized that this possible detection
is barely significant and must be confirmed.  Observations at 2.0
cm (14.9 GHz) show no detection to a limit (3-sigma) of < 0.33 mJy.
New observations at 3.6 cm (8.4 GHz), combined with previous
observations at the same wavelength as reported on IAUC 5743, still show
no detection to a very low limit (3-sigma) of < 0.080 mJy.  Radio
monitoring is continuing at these and other wavelengths.  New
measurements of the compact radio source in the nucleus of NGC 3031
provide the following improved position: R.A. = 9h51m27s.321, Decl.
= +69 18'08".20 (equinox 1950.0; +/- 0".2 in each coordinate).  The
measured peak flux densities of the nucleus are 59 mJy at 3.6 cm
and 12 mJy at 20 cm."


COMET SHOEMAKER-LEVY (1993e)
     B. A. McLeod and K. K. McLeod, Steward Observatory, report
observations made at 2.2 microns with the Steward 1.6-m telescope on
Mt. Bigelow with a NICMOS3 detector.  The 22-min mosaic centered on
Apr. 2.37 UT showed the comet to be 60" long in p.a. 75-255 deg.
The integration showed emission extending 10" to the northwest at
the eastern end of the bar and 20" to the northwest at the western
end.  The integrated K magnitude within a 90" x 55" region was 12.0
+/- 0.15.


SUPERNOVA 1993G in NGC 3690
     J. Stull, Alfred University Observatory, provides the following
information, obtained using a 0.8-m reflector and unfiltered
ST-6 CCD.  Assuming a magnitude of 16.6 on Mar. 12.09 UT to calibrate
the western core of the galaxy as the comparison object, it
followed that the magnitudes of the supernova were 16.7 and 17.0 on
Mar. 19.16 and 26.16, respectively.


1993 April 6                   (5752)            Daniel W. E. Green

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