Central Bureau for Astronomical Telegrams
IAUC 3748: TT Ari; Z And; 1982g; 1982f
The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).
Read IAUC 3749
Circular No. 3748
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
TT ARIETIS
A. Shafter and R. Nolthenius, University of California at Los
Angeles, report that spectroscopic observations of this novalike
variable obtained on Nov. 13 and 15 using the University of Minn./UCSD
1.5-m reflector on Mt. Lemmon revealed the Balmer and He I
emission to be strong (EW H-alpha ~ 10 nm) and extremely narrow. After
correction for the instrumental profile the lines were found to
have an intrinsic width of ~ 175 km/s FWHM. The overall spectrum,
including the Balmer decrement, is remarkably similar to the low-state
spectrum of MV Lyr (see Robinson et al. 1981, Ap. J. 251,
611). J. Patterson, observing TT Ari at Kitt Peak on Nov. 13,
obtained the following magnitudes: U = 14.98, B = 16.31, V =
16.28, R = 15.66, I = 15.09. High-speed photometry by H. E. Bond
and A. D. Grauer at Kitt Peak, and in Oct. by P. Szkody at Kitt
Peak and by E. Kemper at Louisiana State University, shows a
general absence of activity, with only occasional flickering.
According to Bond, the system would brighten at times by as much
as 1 mag. It appears that the mass transfer in TT Ari has become
quite erratic and may be in the process of stopping completely.
Z ANDROMEDAE
Supporting J. Bortle's note on IAUC 3743, J. Mattei, AAVSO,
informs us that observations by AAVSO members show that Z And has
been fluctuating between mean visual mag 11.0 and 10.4 during its
minimum since 1974. From May to Nov. this year the star has been
at visual mag 10.6 +/- 0.3.
COMET AUSTIN (1982g)
Total visual magnitude estimate by J. Bortle, Stormville, NY
(0.32-m reflector): Nov. 16.42 UT, 10.9.
PERIODIC COMET CHURYUMOV-GERASIMENKO (1982f)
Total visual magnitude estimates: Nov. 8.13 UT, 10.7 (C. S.
Morris, Harvard, MA, 0.25-m reflector; 1' tail in p.a. 270);
9.25, 10.0 (C. E. Spratt, Victoria, BC, 0.25-m reflector); 10.22,
10.8 (J. Bortle, Stormville, NY, 0.32-m reflector; 3' tail in p.a.
270); 10.25, 9.7 (Spratt); 16.40, 11.2 (Bortle; 6' tail in p.a.
255); 18.16, 10.7 (Bortle); 20.17, 10.8 (Bortle).
1982 November 29 (3748) Brian G. Marsden
Read IAUC 3749
Our Web policy. Index to the CBAT/MPC/ICQ pages.
