Central Bureau for Astronomical Telegrams
IAUC 3485: COMET TORRES; V603 Aql; 1979C
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Read IAUC 3486
Circular No. 3485
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
COMET TORRES
Carlos Torres, Department of Astronomy, University of Chile,
reports his discovery of a comet on exposures made at the Cerro el
Roble Station:
1980 UT R. A. (1950) Decl. m1
June 13.24769 19 13.9 -32 33 15
14.25116 19 11.5 -32 11 15
The object is diffuse with condensation and a tail < 1o long.
V603 AQUILAE
A. Boggess, H. Drechsel, A. Hoim and J. Rahe, Laboratory for
Astronomy and Solar Physics, Goddard Space Flight Center, report the
detection of periodic light variations of the old nova V603 Aql
(1918) with the fine-error-sensor instrument (FES) aboard the IUE
satellite during an 8-hour observing shift on June 10. Continuous
observations were carried out during more than two complete cycles
of the close-binary system. The light curve shows a broad maximum
and a pronounced minimum that was covered three times, and it is
tentatively interpreted as consistent with an eclipse of the accretion
disk around the white dwarf by the late-main-sequence component.
The measurements are compatible with the spectroscopic period by
Kraft (1964, Ap.J. 139, 457), who found P = 3h19m.5. The amplitude
of the visual light variations amounts to ~ 0.30 mag, with an intrinsic
error of the individual FES magnitudes not exceeding ~ 0.05 mag.
The satellite guide star BD +0 4023 was used as a comparison star.
SUPERNOVA 1979C
K. W. Weiler, National Science Foundation; and Richard A.
Sramek, National Radio Astronomy Observatory, communicate: "We have
detected the supernova 1979C (Johnson) in M100 (NGC 4321) in the radio
at 60 mm wavelength with 5 mJy intensity by the VLA. The position
is R.A. = 12h20m26s.72, Decl. = +16o04'29".5 (equinox 1950.0). The
observation was performed on 1980 Apr. 5; on 1979 Apr. 27 no emission
greater than 0.5 mJy was detected at that position. The nearby
field further contains only a weak 1-mJy point source at about R.A. =
12h20m22s.86, Decl. = +16o05'57.0. The nucleus is extended by ~ 20" with
surface brightness ~ 1 mJy per square arcsecond.
1980 June 17 (3485) Daniel W. E. Green
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