Central Bureau for Astronomical Telegrams
IAUC 3793: V1343 Aql; 1982j; KR Aur
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Circular No. 3793
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
V1343 AQUILAE
R. C. Lamb, Jet Propulsion Laboratory and Iowa State University;
and J. C. Ling, W. A. Mahoney, G. R. Riegler, W. A. Wheaton
and A. S. Jacobson, Jet Propulsion Laboratory, write: "We have
preliminary evidence for gamma-ray line emission from the region
surrounding V1343 Aql (= SS 433), from observations obtained with the
high-resolution gamma-ray spectrometer aboard the HEAO-3 satellite
during 1979 Oct. 10 to Nov. 5 and 1980 Apr. 4-25. One of the
observed lines at an energy of 1.5 MeV has a statistical significance
of more than 6-sigma. Another feature near 1.2 MeV is less prominent.
Both features exhibit line widths of ~ 1 percent. The intensity
of the 1.5-MeV feature has a 46-day time-average value
of 15 +/- 3 photons m**-2 s**-1 and is variable by a factor of about
five on a timescale of days. The 1.2-MeV feature is similarly
variable with a time-average intensity of 11 +/- 2 photons m**-2 s**-1.
The combined power in the lines is ~ 2 . 10**30 J/s, assuming isotropic
emission. The lines varied by ~ 40 keV over ~ 20 days during
the 1979 observations. Optical and radio phenomena previously
observed from SS 433 have been interpreted in terms of a kinematic
model in which two oppositely-directed jets of relativistic material
(v = 0.26c) are ejected from a central source. The energies
of the two features reported here are satisfactorily explained in
terms of this kinematic model as blue- and red-shifted components
of the 1.369-MeV line from nuclear deexcitation of Mg-34 to its
ground state. The energy variation is consistent with the pattern
seen in the optical, in which 'movement' of optical features is
explained by a precession of the axis of the jets in space with a
164-day period."
PERIODIC COMET TEMPEL 1 (1982j)
Total visual magnitude estimates: Mar. 29.80 UT, 11.3 (J.-C.
Merlin, Le Creuset, France, 0.26-m reflector); Apr. 2.10, 11.2 (J.
Bortle, Stormville, NY, 0.32-m reflector); 5.20, 10.9 (C. S.
Morris, Harvard, MA, 0.25-m reflector); 7.14, 10.7 (Morris);
18.22, 10.4 (Morris).
KR AURIGAE
Visual magnitude estimates by J. Bortle, Stormville, NY: Mar.
21.0 UT, 13.4; Apr. 2.1, 13.7.
1983 April 19 (3793) Daniel W. E. Green
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