Central Bureau for Astronomical Telegrams
IAUC 5332: N Sct 1991; 1987A; NOTICE TO E-MAIL SUBSCRIBERS
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Read IAUC 5333
Circular No. 5332
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 or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
NOVA SCUTI 1991
R. H. McNaught, Anglo-Australian Observatory, reports the
following position for this object from a 10-s exposure with the
Uppsala Southern Schmidt on Aug. 31.54 UT: R.A. = 18h44m26s.58, Decl.
= -8 24'12".0 (equinox 1950.0, uncertainty 0".2 in each coordinate).
A nearby star of mag 13 has end figures 27s.18, 107".1. No star
appears in the position of the nova on the first POSS blue or red
surveys. The prenova was recorded on U.K. Schmidt plates as follows:
1980 Sept. 6, mr ~ 20; 1981 May 3, mj ~ 21; 1984 Aug. 23, mr ~ 20. An I
plate taken on 1980 Sept. 4 records the prenova slightly more
prominently, compared to surrounding stars, than the R plate taken two
nights later, suggesting that the prenova is a red star. The
coordinates measured from a film copy of the 1984 R plate have end
figures 26s.58, 12".5 (uncertainty 0".2 in R.A. and 0".3 in Decl.).
The nearby mag 13 star gave measures identical to those above, and a
mag 16 star close to the nova has end figures 26s.86, 06".4.
SUPERNOVA 1987A IN THE LARGE MAGELLANIC CLOUD
R. Chini, C. G. T. Haslam, E. Kreysa, R. Lemke and A. Sievers,
Max-Planck-Institut fur Radioastronomie, Bonn; and L. A. Nymann,
European Southern Observatory, telex: "During Aug. 25-27 we monitored
SN 1987A at a wavelength of 1.3 mm with the MPIFR bolometer on SEST at
La Silla. The flux density within 23" (HPBW) was 18.8 +/- 4 mJy.
During August and September last year we obtained a flux density of
7.6 +/- 2.4 mJy with the same equipment. The increase in the emission
is most probably due to the formation of dust grains."
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1991 August 31 (5332) Brian G. Marsden
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