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IAUC 3556: 1980u; SN IN NGC 1316

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                                                  Circular No. 3556
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

     S. W. Milbourn, British Astronomical Association, cables that
a comet was discovered by Roy W. Panther, of Walgrave, near Northampton,
on Dec. 25, and that the comet was confirmed later the same
evening by M. J. Hendrie and G. E. D. Alcock.  The following
observations are available:

     1980 UT          R. A. (1950) Decl.     m1     Observer
     Dec. 25.788     18 46.7     +38 54     10      Panther
          27.96      18 48.0     +39 26      9.7    Morris

R. W. Panther (Walgrave).  Object diffuse with condensation.
C. S. Morris (Harvard, MA).  Coma diameter 2'.3 (0.25-m reflector),
   more-or-less stellar Condensation offset toward p.a. 230o.

     V. M. Blanco, Cerro Tololo Interamerican Observatory, communicates:
"The supernova in NGC 1316 (IAUC 3548) has been confirmed by
F. Schweizer with 4-m prime-focus plates taken on Dec. 11.2 UT.
The supernova is of type I, with a spectrum showing strong P-Cyg-type
emission lines centered at 395, 460 and 520 nm and a strong
absorption at 615 nm; this was first established by A. F. J. Moffat
on Dec. 11.1 UT with the Yale l-m telescope and image-tube
spectrograph and confirmed on subsequent nights by Schweizer, J. A.
Baldwin and himself with the l-m and 4-m telescopes.  Photoelectric
observations by A. U. Landolt and L. P. Connolly give the following
preliminary values: Dec. 11.1 UT, V = 12.58, B-V = -0.05; 15.2,
12.42, +0.20.  Infrared magnitudes measured by J. A. Hackwell on
Dec. 17.2 and 18.2 UT with the 0.5-m telescope are J = 13.4, H =
13.4, K = 13.3, with no sign yet of an infrared excess."

     J. Koomneef, J. Lub and R. Barbier, European Southern Observatory,
provide infrared magnitudes, obtained on Dec. 21.25 and 22.17
UT (no change within the quoted errors) with the 3.6-m telescope: J
= 14.23 +/- 0.16, H = 13.62 +/- 0.12, K = 13.41 +/- 0.10 (comparison star
HR 2015: J = 3.86, H = 3.74, K = 3.70).  UBV photometry with the
0.91-m Dutch telescope gave: Dec. 17.101 UT, V = 12.45, B-V = +0.27;
22.090, V = 12.62, B-V = +0.63, and Walraven colors V-B = 0.255,
B-U = 0.327, U-W = 0.64, B-L = 0.120 (units 10 log intensity),
indicative of a small Balmer jump, no hydrogen-line absorption and an
extremely red ultraviolet continuum.

1980 December 29               (3556)              Brian G. Marsden

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