Central Bureau for Astronomical Telegrams
IAUC 4428: V394 CrA; 1987J, 1987K; N Sgr 1987
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Circular No. 4428
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
V394 CORONA AUSTRINAE
W. Liller, Vina del Mar, Chile, reports that two PROBLICOM
photographs (2415 tech pan film + orange filter) taken Aug. 2 show
this nova to be in outburst, its first known outburst since 1949,
when it reached mag 7.5. A spectrum taken by Liller on Aug. 3.021
UT (2415 film + red filter) shows intense H-alpha emission and probably
blended [N II] and a weak continuum. D. Herald, Kambah, near
Canberra, A.C.T., provides the following precise position: R.A. =
17h56m58.23; Decl. = -39 00'28.2 (equinox 1950.0). Available visual
(or approximately visual) magnitude estimates: July 23.0 UT, [12
(Liller); 28.443, [11.6 (R. H. McNaught, Siding Spring Observatory,
85mm lens + T-Max 400 film); 29.590, 7.2 (McNaught, Tri-X); 29.616,
7.5 (McNaught, Tri-X); 31.468, 9.6 (McNaught, Tri-X); 31.592, 9.8
(McNaught, T-Max 400); Aug. 1.997, 8.9 (Liller); 3.07, 10.5 (Liller,
Tri-X); 3.445, 9.5 (Herald); 3.50, 10.5 (A. Pearce, Woodlands, W.
Australia); 3.53, 10.2 (D. A. J. Seargent, The Entrance, N.S.W.).
SUPERNOVAE 1987J AND 1987K
A. V. Filippenko, University of California, Berkeley, reports:
"Spectra (range 430-820 nm, resolution 1-1.5 nm) obtained with the
3-m Shane telescope at Lick Observatory on Aug. 1 by W. J. M. van
Breugel and P. J. McCarthy confirm that SN 1987K is a type-II SN,
contrary to the suggestion by Fairall et al. on IAUC 4427. P-Cyg
profiles of H-alpha, H-beta, and He I/Na D (590 nm), as well as some fainter
features, are superposed on a blue continuum. The FWZI of the
relatively weak H-alpha emission line is over 20 000 km/s. Based on the
spectrum, a preliminary age estimate is 1 +/- 1 week past maximum. A
spectrum of SN 1987J shows that this is also a type-II object, 2 +/-
1 months past maximum. The H-alpha emission line (FWHM about 7000 km/s;
FWZI about 14 000 km/s) is strong. Several P-Cyg profiles are visible,
but the He I/Na D feature is weak."
NOVA SAGITTARII 1987
R. Catchpole telexes that infrared JHK photometry by D. Laney
and himself at the South African Astronomical Observatory indicates
that this object formed a dust shell between June 14 and 20.
Visual magnitude estimates by D. A. J. Seargent, The Entrance,
N.S.W. (cf. IAUC 4408): June 22.40 UT, 13.2; 25.39, 13.3:.
1987 August 3 (4428) Daniel W. E. Green
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