Central Bureau for Astronomical Telegrams
IAUC 5989: 1994P; 1994I
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Circular No. 5989
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 1994P IN UGC 6983
Penny Sackett, Institute for Advanced Studies, Princeton
University, reports her discovery of an apparent supernova on
spectrograms of UGC 6983 taken by A. Gould (Ohio State University)
with the 1.8-m telescope at Lowell Observatory on Apr. 20. The
long-slit spectrum was centered on H-alpha, with the long slit
aligned with the major axis of the galaxy. In addition to the
spectrum of the galaxy, there appears a spatially unresolved
feature with very strong, broad emission around H-alpha,
asymmetric and having width of about 3000 km/s; this unresolved
feature is much brighter than the H-alpha emission of the galaxy.
SN 1994P appears about 120" northeast of the galaxy's center
(toward p.a. 75o).
A. Filippenko, University of California at Berkeley, writes:
"P. Sackett faxed me an uncalibrated spectrum of her supernova
candidate in UGC 6983. The object does indeed seem to be a type-II
supernova, several months past maximum brightness. H-alpha is
purely (or nearly purely) in emission." M. W. Richmond, Princeton
University, measured the following position for SN 1994P from a V-
band image taken by T. Matheson (University of California, Berkeley)
with the Nickel 1-m reflector at Lick Observatory on May 14 UT:
R.A. = 11h56m46s.57 +/- 0s.04, Decl. = +52o59'40".7 +/- 0".1
(equinox 1950.0); the corresponding offset from the galaxy 'nucleus'
(defined as the bright patch in the central bar of the galaxy, very
slightly east of the geometric center) is 105".2 east and 31".1
north. Richmond also measured V about 18.2 for the supernova.
SUPERNOVA 1994I IN NGC 5194
L. V. Morrison and R. W. Argyle, Royal Greenwich Observatory,
report an accurate optical position of SN 1994I obtained with the
Carlsberg Automatic Meridian Circle on La Palma (operated by L.
Helmer and R. Argyle): R.A. = 13h29m54s.072, Decl. = +47o11'30".50
(equinox J2000.0, FK5 reference frame; epoch 1994.28; +/- 0".08 in
both coordinates; from six observations in R.A. and nine in Decl.).
They add: "This optical position is about 0".5 west and 0".1 north
of the VLA position reported on IAUC 5963; this optical position
should not be biased towards the nucleus of the galaxy, which is
about 14" west and 12" north of the supernova. However, a gradient
in the background intensity around SN 1994I could bias our result.
This would produce a systematic shift of the position as the
magnitude of the supernova declined. There is no evidence of this
in the individual observations."
1994 May 17 (5989) Daniel W. E. Green
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