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IAUC 4260: 1986L; N Cyg 1986; 1986J; 1986l

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IAUC number

                                                  Circular No. 4260
Central Bureau for Astronomical Telegrams
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

     R. Evans, Hazelbrook, N.S.W., reports his discovery of another
supernova in NGC 1559 (he also discovered SN 1984J in this galaxy;
cf. IAUC 3963).  SN 1986L is located 50" due west of the galaxy's
nucleus (R.A. = 4h17m0, Decl. = -62deg55', equinox 1950.0).  Evans estimated
mv = 13.5 on Oct. 7.6 UT, and mv [15.5 on Oct. 2.  Confirmation has
been made by R. McNaught, T. Cragg, and G. Thompson.

     Y. Andrillat, Universite des Sciences et Techniques du
Languedoc, Montpellier, and L. Houziaux, Universite de Liege,
communicate: "Spectra taken Sept. 11.8 UT at Observatoire de Haute-
Provence show the line profiles as having a strong emission component
flanked by two violet displaced absorptions: -1600 km/s (strong)
and -650 km/s (moderate).  The mean full-width of the emission for H-beta,
H-gamma, and H-delta is 2000 km/s, and the Balmer decrement was steep.
We confirm the presence of previously observed multiplets (IAUC
4246).  On Sept. 14.8, the most prominent features seen over 720-
1040 nm are O I (844.6 nm), forming a wide blend with the Ca II
triplet.  Other conspicuous lines are 777.2 (O I), 821.1 (N I + O
I), 771.2 (Fe II), and 940 nm (C I); [N I] is present at 1039.5 nm.
The only H lines identified on Sept. 14.8 are P7, P8, and P9."

     Further visual magnitude estimates (cf. IAUC 4259) by  M. V.
Zanotta, Milan, Italy:  Sept. 21.81 UT, 10.5; 29.84, 10.5.

     A. Wehrle, University of California at Los Angeles, reports
that additional prediscovery observations (cf. IAUC 4258) of this
object were obtained with the Very Large Array as follows:  1984
Dec. 6 (flux density 65 mJy at 6 cm), 1985 June 7 (58 mJy at 2 cm),
and 1986 May 1 (128 mJy at 6 cm).

     Further total visual magnitude estimates: Sept. 21.78 UT, 10.7
(M. V. Zanotta, Milan, Italy, 0.30-m reflector); 29.19, 11.7 (C. S.
Morris, Whitaker Peak, CA, 0.26-m reflector; 3' tail in p.a. 80 deg);
Oct. 2.90, 10.8 (J.-C. Merlin, Le Creusot, France, 0.15-m refl.);
4.15, 11.2 (Morris); 5.26, 11.2 (Morris, Lockwood Valley, CA).

1986 October 7                 (4260)            Daniel W. E. Green

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