Central Bureau for Astronomical Telegrams
IAUC 5946: 1994C; 1994D; 1993v
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Circular No. 5946
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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
MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)
SUPERNOVA 1994C IN ANONYMOUS GALAXY
J. Mueller reports her discovery of a supernova of mag 17.5-18,
found on a blue plate taken on Mar. 5 UT with the 1.2-m Oschin
Schmidt Telescope by J. D. Mendenhall and herself in the course of
the second Palomar Sky Survey. SN 1994C is located at R.A. =
7h53m08s.07, Decl. = +45o00'20".8 (equinox 1950.0); the galaxy's
center is located at (end figures) 08s.27, 14".1. A spectrogram
obtained by S. Djorgovski, D. Thompson, and J. Smith on Mar. 9 with
the 5-m Hale Telescope (+ double spectrograph) confirms that the
object is a supernova.
SUPERNOVA 1994D IN NGC 4526
R. R. Treffers, A. V. Filippenko, and S. D. Van Dyk, University
of California at Berkeley; and M. W. Richmond, Princeton University,
report their discovery of a supernova in NGC 4526 (R.A. = 12h31m31s,
Decl. = +7o58'.5, equinox 1950.0), located about 9" west and 7"
north of the galaxy's nucleus: "The object was found on Mar. 7 UT
(R = 15.2 +/- 0.5) during the Leuschner Observatory Supernova Search,
which uses an automated 0.76-m telescope equipped with the Lawrence
Berkeley Laboratory CCD camera. Confirmation was made with an image
taken through thin fog on Mar. 9, and the object appeared to be
brighter than on Mar. 7. It could not be detected to a limiting
magnitude of R about 17 on Mar. 1. Inspection of spectra (range
310-730 nm) obtained by A. Martel and R. W. Goodrich (University of
California at Santa Cruz) on Mar. 9 UT with the Shane 3-m reflector
at Lick Observatory reveals that the supernova is of type Ia,
probably about 1 week prior to maximum brightness. The minimum of
the Si II 635.5-nm trough is at 604 nm, yielding an expansion
velocity of roughly 15 000 km/s. The continuum is very blue. This
supernova could reach mag 11 to 12, since the parent galaxy is in
the Virgo cluster; further observations at all wavelengths are urged."
COMET McNAUGHT-RUSSELL (1993v)
Total visual magnitude estimates from Australia, all made
using 10x50 binoculars: Mar. 2.46 UT, 8.6 (G. Garradd, Tamworth,
N.S.W.); 3.42, 7.8 (D. A. J. Seargent, The Entrance, N.S.W.); 9.43,
7.8 (R. H. McNaught, Siding Spring Observatory).
1994 March 9 (5946) Daniel W. E. Green
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