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IAUC 3895: SN IN NGC 1365; 0139-68; 1983 TB; 1982k

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IAUC number

                                                  Circular No. 3895
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 617-864-5758

     J. Mattei, AAVSO, informs us that T. Cragg, Anglo-Australian
Observatory, reports that R. Evans, Maclean, N.S.W., has discovered
a supernova 57" west and 30" south of the nucleus of NGC 1365
(R.A. = 3h31m7, Decl. = -36deg18', equinox 1950.0).  At its discovery on
Nov. 25.5 UT the object was of mag 13.5.  Confirmation was immediately
obtained by Cragg, whose spectroscopic observations with the
Anglo-Australian Telescope show broad Balmer lines in absorption,
with H& and He I 469 nm blended.  The radial velocity is 6000
km/s, the supernova is of Type II and perhaps still on the rise.

      A. Cowley, Arizona State University; and J. Hutchings and D.
Crampton, Dominion Astrophysical Observatory, write: "The AM-Her-
type system 0139-68, normally varying periodically between mag
14.9 and 16.4 (Visvanathan and Pickles 1982, Nature 298, 41), is
now fainter than mag 18.  Spectra obtained at Cerro Tololo
Interamerican Observatory on Nov. 14 and 15 show no emission, except
for very weak, narrow, double H-beta, indicating that the accretion
has almost completely turned off.  While the system is in this
unusually faint state, it should be possible to study the nature of
the underlying white dwarf."

1983 TB
     C. Shoemaker and E. Bowell have pointed out that the images
of 1983 TB obtained by B. A. Skiff at the Lowell Anderson Mesa
Station on Oct. 12 were strongly affected by cloud.  The following
measurements by Bowell of the beginnings of the trails seem to be
preferable to the measurements shown on IAUC 3879.  The position
here by C. Kowal (Palomar) revises that on IAUC 3883.

   1983 UT          R.A.   (1950.0)   Decl.    Mag.   Observer

   Oct. 12.09653   17 50 12.79   +59 11 14.2          Skiff
        12.11458   17 50 37.46   +59 10 48.3            "
        13.13055   18 12 28.85   +58 37 27.0   16.0   Kowal

     Total visual magnitude estimate by J.-C. Merlin, Le Creusot,
France, 0.26-m reflector): Oct. 7.82 UT, 9.7.

1983 November 25               (3895)              Brian G. Marsden

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