Central Bureau for Astronomical Telegrams
IAUC 6122: 1994w; 1994aj; Poss. SN IN NGC 2782
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Circular No. 6122
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
Phone 617-495-7244/7440/7444 TWX 710-320-6842 ASTROGRAM CAM
MARSDEN@CFA.HARVARD.EDU or GREEN@CFA.HARVARD.EDU (science)
PERIODIC COMET SCHWASSMANN-WACHMANN 3 (1994w)
K. Birkle, Max Planck Institute for Astronomy, Heidelberg; H.
Bohnhardt, Astronomical Institute, University of Munich; and G.
Schwehm, ESTEC, Noordwijk, report their recovery of this comet with
the prime-focus CCD camera on the 3.5-m reflector at Calar Alto, as
follows:
1994 UT R.A. (2000) Decl. m1
Dec. 28.03183 10 29 24.2 +23 50 51 22
29.07865 10 29 22.7 +23 57 07
There was no detectable coma. The indicated correction to the
prediction on MPC 20123 is Delta T = +0.15 day.
SUPERNOVA 1994aj IN ANONYMOUS GALAXY
S. Benetti, European Southern Observatory (ESO), reports: "A
fully-reduced CCD spectrum (range 450-700 nm, resolution 1.2 nm),
obtained on Dec. 31.22 UT with the ESO 2.2-m telescope (+ EFOSC2),
of SN 1994aj (cf. IAUC 6121) shows H-alpha and H-beta lines with a
complex shape superimposed on a relatively blue continuum. The
Balmer lines consist of a broad compoment (FWHM about 7000 km/s) in
emission, superimposed by a second component having a narrow P-Cyg
profile (expansion velocity 1000 km/s and emission peaks measured
at 677.5 and 501.6 nm). Other lines present in the spectrum, such
as Fe II and Na I D, seem to have normal P-Cyg profiles. The
expansion velocity derived from the minimum of the Na I D lines,
corrected by the recession velocity of 9600 km/s of the parent
galaxy (measured from a faint H-alpha emission present in the
galaxy spectrum) is about 3500 km/s. Spectroscopic and photometric
observations are greatly needed to follow the evolution of this
unique type-II supernova."
POSSIBLE SUPERNOVA IN NGC 2782
S. Nakano, Sumoto, Japan, reports the discovery of a possible
supernova (mag 16.3) by Reiki Kushida at Yatsugatake South Base
Observatory. Found on an unfiltered CCD image taken on Dec. 24.856
UT, the candidate's position is R.A. = 9h10m50s.13, Decl. =
+40o18'47".1 (equinox 1950.0; measured by Y. Kushida), which is 50"
west and 30" south of the center of NGC 2782. Additional CCD
magnitudes: Dec. 17, [16.4; 27.762, 16.1. A star of mag 16.7 is
located 60" west and 35" north of the galaxy's center.
1994 December 31 (6122) Daniel W. E. Green
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