Central Bureau for Astronomical Telegrams

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IAUC 4050: 1985H; 1985G; NGC 3031; RS Oph

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IAUC number

                                                  Circular No. 4050
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

     J. Kristian, California Institute of Technology, reports that
J. C. Nemec and S. Staples at Palomar have discovered a supernova
32" west and 22" north of the nucleus of NGC 3359 (R.A. = 10h43m4, Decl.
= +63deg30', equinox 1950.0).  The object was observed on Apr. 3.27
UT to be brighter than the galaxy's nucleus.

     Y. Kozai, Tokyo Astronomical Observatory, telexes the following
precise position, measured by T. Soyano from an exposure with
the 1.05-m Kiso Schmidt telescope on Mar. 28: R.A. = 12h26m07s96, Decl. =
+9deg32'14"7 (equinox 1950.0).  End figures for the position of the
galaxy's nucleus are 08s09, 08"1.  The discovery film is poor and
the position on IAUC 4049 unsatisfactory.  It should have been
stated that the IAUC 4049 position was measured by H. Kosai and
that it and the rest of the message were communicated by Y. Kozai.

NGC 3031
     A. V. Filippenko, University of California, Berkeley, reports
that optical spectra of the nucleus of NGC 3031 (M81) obtained on
Mar. 19 with the Shane telescope at the Lick Observatory reveal a
broad component of HS emission (FWZI = 5000 km/s) in addition to
the narrow lines.  As was first discussed by Peimbert and Torres-
Peimbert (1981, Ap.J. 245, 845), this emission is much weaker than
in normal type 1 Seyfert galaxies, but preliminary reductions
indicate that its current strength is roughly 30-40 percent greater
than on 1984 Feb. 12 (Filippenko and Sargent 1985, Ap.J. Suppl.,
March).  This increase may be related to the activity at x-ray
energies recently discovered by Barr and Giommi (IAUC 4044).

     P. A. Feldman, Herzberg Institute of Astrophysics, Ottawa,
reports the measurement of radio emission from the present outburst
of this recurrent nova (IAUC 4030, 4036, 4049) with the 46-m
telescope of the Algonquin Radio Observatory.  During Mar. 21-26
four series of observations at 10.6 GHz yielded a flux density of
51 +/- 3 mJy with no evidence of variability.  It should be noted
that the Algonquin Observatory is again available to outside users.

1985 April 4                   (4050)              Brian G. Marsden

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