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IAUC 3892: 2CG 195+04 = 'GEMINGA'; AM Her; SN IN NGC 3227; 1983p

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                                                  Circular No. 3892
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

2CG 195+04 = 'GEMINGA'
     J. Lecacheux, H. Sol and C. Vanderriest, Observatoire de
Meudon; L. Vigroux, Centre d'Etudes Nucleaires de Saclay: G.
Lelievre, Canada-France-Hawaii Telescope; and M. Tarenghi, European
Southern Observatory, report the following astrometric observation
of the mag-21 object identified by Caraveo et al. (1983,
Ap.J. in press) as the optical counterpart of this G-ray source: R.A.
= 6h30m59s32 +/- 0s01, Decl. = +17deg48'35"0 +/- 0"1 (equinox 1950.0).
Three deep observations (1982 Nov. 24, CCD camera, E.S.O.; 1983
Apr. 15, CCD camera, C.F.H.T.; and 1983 Oct. 11, valve electronographic
camera, C.F.H.T.) give an upper limit of 0"2 for both its
parallax and annual proper motion.

     T. Mazeh, Tel Aviv University; K. Kieboom, Technion Haifa;
and J. Heise, Space Research Laboratory, Utrecht, telex: "Photometric
observations at the Wise Observatory show that AM Her has entered
another low state.  On Nov. 2.8 and 3.8 the star was at V =
15.2, B = 15.5. Variations of ~ 0.3 mag have also been detected."

     Visual magnitude estimates: Aug. 13.99 UT, 14.0 (M. Cavagna,
Milan, Italy); Oct. 4.8 UT, 13.5 (M. Verdenet, Bourbon-Lancy,
France); 5.8, 14.1 (Verdenet); 6.78, 14.5 (Verdenet); 7.78 and
continuing to Nov. 10, 14.9-15.0 (Verdenet).

     R. Wood, Royal Greenwich Observatory, communicates the
following precise position, by Jones and Eldridge, of the supernova
mentioned on IAUC 3887: R.A. = 10h20m45s59, Decl. = +20deg07'07"7
(equinox 1950.0).  On Nov. 15 the object was at mpg = 14.2.

     Total visual magnitude estimates by J.-C. Merlin, Le Creusot,
France (0.26-m refl.): Sept. 26.81 UT, 11.6; 28.81, 11.7; 30.81,
11.7; Oct. 2.89, 12.2; 4.86, 12.2; 7.85, 12.0; 11.88, 12.1.
During Oct. 4-7 a taillike feature was observed to move from p.a.
248 to 217; a short spike appeared at p.a. 199 on Oct. 11.  An
estimate by C. S. Morris, Harvard, MA (0.25-m reflector), on Oct.
29.01 UT gave m1 = 12.8.

1983 November 21               (3892)              Brian G. Marsden

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