Central Bureau for Astronomical Telegrams
IAUC 5973: 1993e; 1994I; 1994K
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Circular No. 5973
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)
PERIODIC COMET SHOEMAKER-LEVY 9 (1993e)
For the Hubble Space Telescope (HST) observing team, H. A.
Weaver, Space Telescope Science Institute, reports the following
results from their analysis of HST WFPC-2 images and FOS spectra
taken during Mar. 29-30: "Fragment 8b is now clearly two separate
fragments (provisionally designated 8b1 and 8b2 for the brighter
and fainter ones, respectively). Fragment 8b2 appears rather
diffuse and is a good candidate for disappearing over the next
month or so. At the expected positions of fragments 4 and 8a,
there are only barely discernible 'puffs', which will presumably
become undetectable within a month. The brightness 'spur' near
fragment 5 (cf. IAUC 5947) has apparently decreased in intensity,
and there is no evidence for any new fragments in this region.
All of the other fragments still have strongly condensed appearances,
much as they had during the previous HST observations in July 1993
and Jan. 1994. The amount of dust within about 1" of fragment 15
(the best-analyzed) has apparently changed very little since last
July, while the amount of dust farther out decreased dramatically
(e.g., a decrease by a factor of about 4 from July to Jan. for a 5"-
radius aperture; there has been little change in the dust content
within 5" from Jan. to Mar.). No emission features are seen in an
88-min FOS spectrum of the region 222-328 nm with the 3".7 x 1".2
aperture placed near fragment 7a. The limit on the brightness of
the OH (0,0) band near 309 nm is 1.9 Rayleighs, which translates
into an upper limit of about 2.4 x 10E11 molecules/cmE2 for the
average OH column density and about 1.2 x 10E27 molecules/s for the
water production rate (all limits are 3 sigma)."
SUPERNOVA 1994I IN NGC 5194
P. Wild, Astronomical Institute, Berne, reports that a
photograph on T-Max film taken Mar. 30.916 UT at Zimmerwald
(limiting magnitude near V = 16.0) tentatively suggests that the
supernova was not visible, although the bright galaxy background
makes it difficult to draw a definite conclusion.
SUPERNOVA 1994K IN ANONYMOUS GALAXY
Corrigendum. On IAUC 5972, line 8, for (University of
Kentucky) read (Multiple Mirror Telescope Observatory). Also,
the spectrogram reported by Schmidt and Kirshner was taken on
Apr. 10 UT.
1994 April 12 (5973) Daniel W. E. Green
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