Central Bureau for Astronomical Telegrams
IAUC 4474: 1987b1; PU Vul; 1987A; 1987y
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Read IAUC 4475
Circular No. 4474
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
COMET McNAUGHT (1987b1)
The following precise positions have been reported by R. H.
McNaught, Siding Spring Observatory:
1987 UT R. A. (1950) Decl.
Oct. 9.40012 13 30 56.87 -56 15 04.9
20.42900 14 32 44.47 -50 54 23.4
PU VULPECULAE
H. M. Maitzen, A. Schnell, and J. Hron, Institut fur Astronomie,
Vienna, telex: "This novalike object (cf. IAUC 3344, 3348)
has entered a phase of increasing emission line strength during the
last three months. Following are descriptions of IIaO spectra
(12.5 nm/mm) obtained at the 1.5-m telescope of the Figl Astrophysical
Observatory (the UBV photoelectric photometry results were
obtained with the Figl 0.60-m telescope): 1987 July 22.92 UT, H-beta
and H-gamma in emission, H-delta in absorption, very weak absorption line
spectrum; V = 8.695, B-V = +0.473, U-B = -0.345. Sept. 22.86, in
addition to H-beta and H-gamma in emission, also H-delta in (weak) emission with
faint blueside absorption, no other lines in emission; V = 8.883,
B-V = +0.504, U-B = -0.381. Oct. 9.85, Balmer emission extended to
H-epsilon, a number of singly ionized Fe lines in emission, also faint
emission of Mg II (448.1 nm) and Si II (412.8-413.1 nm); V = 8.924,
B-V = +0.523, U-B = -0.480. The first visible absorption line
towards the blue is Ca II (K)."
SUPERNOVA 1987A IN THE LARGE MAGELLANIC CLOUD
G. K. Moore, University of Wollonrong, telexes the following
photometry: Oct. 5.7 UT, V = 5.35, B-V = +1.36, V-R = +1.04, V-I =
+1.54; Oct. 16.7, 5.44, +1.42, +1.08, +1.54.
Visual magnitude estimates (cf. IAUC 4468): Oct. 14.48 UT,
5.3 (A. C. Beresford, Adelaide, South Australia); 16.58, 5.8 (D. A.
J. Seargent, The Entrance, N.S.W.); 18.56, 5.5 (Beresford); 20.51,
5.6 (R. H. McNaught, Siding Spring Observatory).
COMET LEVY (1987y)
Total visual magnitude estimates by C. S. Morris, Whitaker
Peak, CA (0.26-m reflector): Oct. 17.11 UT, 9.1; 18.11, 9.1.
1987 October 21 (4474) Daniel W. E. Green
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