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IAUC 5444: 1992D; 1992b; 1991d

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                                                  Circular No. 5444
Central Bureau for Astronomical Telegrams
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505

     R. H. McNaught, Anglo-Australian Observatory, reports his
discovery of a supernova (mag about 19) on a red plate taken Jan. 28.6
UT by M. J. Drinkwater with the U.K. Schmidt Telescope.  The
supernova is situated in a spiral arm at R.A. = 5h58m50s.93, Decl. =
-20 22'09".2 (equinox 1950.0, uncertainty 0".3 in R.A., 0".5 in
Decl.); the offset from the galaxy's center is 1".0 west and 7".0
south.  No star appears at this location on the ESO R survey.  A
nearby field star of mag about 17.5 is located at R.A. =
5h58m55s.53, Decl. = -20 22'19".8.
     M. Della Valle and C. Gouiffes, European Southern Observatory,
communicate:  "Analysis of a spectrum (range 460-720 nm, resolution
about 2.0 nm), obtained on Feb. 1.2 UT with the ESO/MPI 2.2-m telescope
(+ EFOSC) at La Silla, indicates an unusual type-II supernova
with H-alpha (FWZI about 4600 km/s) and H-beta emissions (FWZI 4700
km/s), superimposed on a blue continuum, and no P-Cyg absorptions.
The redshift of the host galaxy, determined from the narrow H-alpha
emission of an underlying H II region, is z = 0.05.  Preliminary
photometric measurements give R = 18.7 +/- 0.1 on the same night."

     McNaught also provides his measurement of another CCD image of
this comet obtained by S. D. Ryder with the Siding Spring 1.0-m
reflector (through haze):

     1992 UT             R.A. (2000) Decl.
     Feb.  3.73512   16 31 10.49   -42 01 18.3

     Total visual magnitude estimates:  1991 Dec. 14.54 UT, 9.9 (D.
Levy, Tucson, AZ, 0.41-m reflector); 1992 Jan. 12.44, 9.9 (J. E.
Bortle, Stormville, NY, 0.32-m reflector); 16.50, 10.2 (Levy; fan
tail in p.a. about 90 deg); 30.83, 10.8 (B. H. Granslo, Harestua,
Norway, 0.20-m reflector); Feb. 2.16, 10.9 (S. Garro, Merlette,
France, 0.20-m reflector; faint 8' tail toward p.a. 335 deg); 3.43,
9.9 (Bortle).

1992 February 4                (5444)             Daniel W. E. Green

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