Central Bureau for Astronomical Telegrams
IAUC 3943: SNe; 1982i
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Circular No. 3943
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM Telephone 617-495-7244/7440/7444
SUPERNOVAE
J. Maza, Department of Astronomy, University of Chile, telexes
that M. Wischnjewsky has discovered a supernova on a plate taken by
L. E. Gonzalez on May 2. The object is 18" west and 3" south of
the center (R.A. = 6h23m6, Decl. = -34deg46', equinox 1950.0) of
ESO 308-G05 and was then at mpg = 18.5.
Maza also informs us that the Gonzalez supernova (cf. IAUC
3942) was at mpg 20, not 10, on May 5.
STRONG WATER MASER
R. F. Haynes, R. S. Roger, J. R. Forster, B. J. Robinson, R.
A. Batchelor and K. J. Wellington, Division of Radiophysics, CSIRO,
Sydney, report: "We have discovered a very strong H2O maser at R.A. =
13h13m28s6, Decl. = -62deg42'54"5 (equinox 1950.0: 1-sigma error +/- 15" ).
The peak intensity measured on Apr. 30 was in excess of 3000 Jy as
measured in the feature centered at an LSR velocity of -26 km/s.
Other features are observed at -32.5, -37 and -51 km/s. Inspection
of the southern hemisphere 5-GHz survey (Haynes, Caswell and Simons
1978, Aust. J. Phys. Suppl. No. 45) shows no strong, compact H II
region in the immediate neighborhood of the H2O source, nor any old
maser. Recombination-line measurements in the nearby G305.4
complex of H II regions (Caswell and Haynes, private communication)
show characteristic LSR velocities of -30 to -40 km/s. Inspection
of southern-hemisphere plates shows that no bright infrared star is
present at the position of the H2O maser, although some obscuration
is clearly present. The authors request that observations be made
in the infrared and at OH and H2CO recombination-line frequencies
at an early date, while the H2O maser remains strong."
PERIODIC COMET HALLEY (1982i)
R. M. West, European Southern Observatory, telexes that a
photometric reduction of 25 CCD frames taken during Jan. 27-30 (cf.
IAUC 3914) by H. Pedersen and himself shows night-to-night variations
of about 1 magnitude, confirming the existence of variability,
but not the period and/or epoch of maximum given on IAUC 3934.
It appears that the period is longer than was previously suggested.
1984 May 14 (3943) Daniel W. E. Green
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