Central Bureau for Astronomical Telegrams
IAUC 4592: 1987A; 1988a; V1819 Cyg
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Circular No. 4592
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
MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
SUPERNOVA 1987A IN THE LARGE MAGELLANIC CLOUD
F. Witteborn, J. Bregman and D. Wooden, NASA Ames Research
Center; P. Pinto and D. Rank, Lick Observatory; and M. Cohen,
University of California, Berkeley, report: "Infrared spectra (range
1.7-12.6 microns, resolving powers 60-200) were obtained using the
Kuiper Airborne Observatory on Apr. 9, 11 and 14. Numerous emission
lines were measured including Co II 10.5 microns, Ni II 6.6
microns, Ar II 6.98 microns, Ni I 11.3 microns, Ni I* (not a resonance
line) 3.12 microns, Pa alpha, Br alpha, beta, gamma, delta
and Pf alpha, beta, gamma and delta. Since 1987 Nov. 12
the continuum has dropped by a factor of four or more,
and the Co II line has dropped by a factor of nearly two
relative to the Ni II line. The CO and SiO fundamentals were also
observed. Line profiles of Ni II and Ar II show that these ions are
expanding radially from the core with an average velocity near 1500
km/s. In addition, both profiles show a weak (10 percent of the line)
component displaced about 3000 km/s to the red of the central line
peaks. The centroid of the main peak of the Ar II emission line is
shifted 650 km/s to the red from the Ar II emission line in the
galactic H II region G333.6."
Corrigendum. On IAUC 4567, line 14, for 25" east read 25" west
COMET LILLER (1988a)
Total visual magnitude estimates: Apr. 24.45, 5.2 (C. S. Morris,
Whitaker Peak, CA, 10 x 50 binoculars; 3.0-deg tail in p.a. 350 deg);
26.43, 5.9 (A. Hale, Las Cruces, NM, 10 x 50 binoculars; 75' tail in
p.a. 351 deg); 28.14, 6.0 (M. Magee, Kitt Peak, AZ, 10 x 50
binoculars); May 3.89, 6.2 (J. D. Shanklin, Cambridge, England, 10 x 80
binoculars; 1.1-deg tail in p.a. 355 deg); 5.88, 6.0 (A. Pereira,
Linda-a-Velha, Portugal, 9 x 34 binoculars); 7.15, 5.7 (Pereira);
9.08, 5.9 (D. W. E. Green, near Willington, CT, 7 x 50 binoculars;
2-deg tail in p.a. 18 deg); 10.19, 6.1 (Morris, near Mt. Wilson, CA,
20 x 80 binoculars).
V1819 CYGNI
Visual magnitude estimates: Feb. 14.22 UT, 13.6 (M. Verdenet,
Bourbon-Lancy, France); 19.2, 13.4 (Verdenet); 20.2, 13.4 (Verdenet);
21.2, 13.4 (Verdenet); Mar. 20.14, 13.8 (A. Boattini, Florence,
Italy); 23.13, 14.1 (Boattini); 25.14, 14.2 (Boattini).
1988 May 10 (4592) Brian G. Marsden
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