Central Bureau for Astronomical Telegrams
IAUC 3407: SU Tau; omicron Cet; SS 433
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Circular No. 3407
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
SU TAURI
J. Mattei, American Association of Variable Star Observers,
informs us that observations by P. L. Collins, J. Griese and P.
Goodwin suggest that this R-CrB variable is fading. Selected
observations by Collins: Aug. 31.31 UT, mv = 9.5; Sept. 8.32, 9.6;
10.27, 10.0; 13.24, 10.1; 16.30, 10.7; 18.37, 10.7.
omicron CETI
I. S. McLean communicates: "A campaign to observe the long-period
variable Mira (omicron Cet) around the time of the current light
maximum (Oct. 18) has been organized informally by the University
of Arizona. Direct invitations to several colleagues in divers
fields were made earlier this year. As maximum light approaches,
we here urge all interested members of the astronomical community
to contribute in any way possible. Brief reports could be sent to
the IAU Commission 27 IBVS (edited at the Konkoly Observatory,
Budapest) or to me at the address: Steward Observatory, University of
Arizona, Tucson, AZ 85721, U.S.A. (telephone 602-626-2876)."
SS 433
M. Dennefeld, European Southern Observatory, reports: "Near
infrared spectra (600-1100 nm) of SS 433 were obtained at a resolution
of 1.2 nm on June 11 and 12 with the experimental E.S.O. reticon
system. The following strong emission lines were detected in
the stationary system, superposed on a red continuum: O I 845 nm,
P6-16, the infrared Ca II triplet, He II 1012 and very strong He I
1083 nm. Additional fainter lines are ascribed to He I 728, O I
777 and Mg II 788-790 nm. The probable presence of the O I multiplet
34 around 823 nm, blended with He II 824 nm, and O I 725 nm,
could, if confirmed, suggest that O I 845 nm is excited by starlight
rather than by L-beta fluorescence. The red moving components of
P9, P10 and Ca II 854 nm have also been detected. Image-tube
spectra in the same region with equivalent resolution were obtained at
Haute Provence Observatory on Sept. 13 and 14 in collaboration with
Y. Andrillat. They confirm the presence of the above-mentioned
strong lines and show also the moving components of He I 1083 nm."
1979 September 19 (3407) Brian G. Marsden
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