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IAUC 3589: SN (EVANS) IN NGC 1316; SN IN NGC 4536; PU Vul (KUWANO'S OBJECT)

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IAUC number 

                                                  Circular No. 3589
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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


SUPERNOVA (EVANS) IN NGC 1316
     J. W. Menzies, South African Astronomical Observatory, telexes
that his IPCS spectra (dispersion 4.5 x 10**-6) on Mar. 12.76 and
15.79 in the blue and on Mar. 16.77 in the red show this to be a
typical type I supernova after maximum, with pronounced emission
peaks at 390 and 460 nm and strong absorption near 615 nm.
     E. G. Tanzi, Istituto di Fisica Cosmica1 Milan; and M.
Tarenghi, European Southern Observatory, Garching, communicate the
following near infrared magnitudes, obtained on Mar. 24.00 and
25.03 UT: J = 14.5 +/- 0.1, H = 13.8 +/- 0.1, K = 13.6 +/- 0.1 (mean of
two nights).  The reference star was HR 1302 (assumed J = 4.28, H =4.12,
K = 4.08). They add that the infrared colors are remarkably
similar to those of Wischnjewsky's supernova in the same galaxy
(IAUC 3548) at a comparable time after outburst.


SUPERNOVA IN NGC 4536
     Menzies also reports that similar IPCS spectra on Mar. 12.95
and 12.98 in the blue and on Mar. 13.02 in the red show this also
to be of type I but with smoother continuum and fewer features than
in the case of Evans' supernova in NGC 1316, indicating an earlier
stage of development.
     Tanzi and Tarenghi also communicate near infrared magnitudes
of this object, obtained on Mar. 23.19 and 24.30 UT: J = 14.2 +/- 0.1
H = 13.1 + /- 0.1, K = 12.9 +/- 0.1 (mean of two nights).  The primary
reference star was HR 2354 (J = 5.45, H = 5.14, K = 5.03).  No
variation showed up within the quoted uncertainties.
     I. Busko, F. Jablonski and C. Torres, Observatorio Astrofisico
Brasileira, Itajuba, provide the following photoelectric magnitudes:
Mar. 11.15 UT, V = 11.98, B-V = +0.15, U-B = -0.10; 12.15, V =
12.05, B-V = +0.10, U-B = +0.01; 13.21, V = 12.08, B-V = +0.18.
     R. Wood, Royal Greenwich Observatory, communicates the following
precise position, measured by  E. D. Clements from exposures
with the 0.66-m refractor: R.A. = 12h31m56s.30 +/- 0s.03, Decl. = +2o28'31".0
+/- 0".2 (equinox 1950.0).  Seven AGK3 reference stars were used.


PU VULPECULAE (KUWANO'S OBJECT)
     Visual magnitude estimate by M. Verdenet, Bourbon-Lancy,
France: Mar. 15.2 UT, 11.7 (cf. IAUC 3344, etc.).


1981 March 31                  (3589)              Brian G. Marsden

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