Central Bureau for Astronomical Telegrams
IAUC 3317: Prob. COMET; EW Lac; WRA 977
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Circular No. 3317
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
PROBABLE COMET
R. M. West, European Southern Observatory, reports that he has
found a probable comet trail on a 120-min red exposure by H.-E.
Schuster with the 100-cm Schmidt telescope:
1978 UT R. A. (1950) Decl. m1
Nov. 30.07887 1 47 17.5 -40 43 26 18
Daily motion: dR.A. = +/- 0m.53, dDecl. = + 1'.4 There was a tail 1' long
to the west-northwest. No confirmation is available.
EW LACERTAE
P. Hadrava, P. Harmanec, P. Koubsky, J. Krpata and F. Zdarsky,
Ondrejov Observatory, report: "The shell spectrum of EW Lac, stable
from 1926 to the end of 1977 (V/R ~ 1, radial velocity between -10
and -25 km/s without notable progression), suffered a strong change
recently. A coude spectrogram on Dec. 5 shows V/R >> 1 for H and
Fe II lines. The following velocities (in km/s) have been found:
1978 UT H4 H5 H15-H21 Fe II
July 7.912 -27 -20 +4.3 +/- 2.9 + 6
Dec. 5.869 -27 - 6 -5.7 +/- 0.8 - 5
Activity similar to that shown by zeta Tau or 48 Lib is to be expected,
and further monitoring is desirable."
WRA 977
M. Pakull, European Southern Observatory, communicates: "New
photometric observations of WRA 977, the optical counterpart of 4U
1223-62, are combined with earlier results (Bord et al. 1976, Astrophys.
J. 203, 689; Hammerschlag-Hensberge et al. 1976, Astron. Astrophys.
49, 321; van Genderen 1977, ibid. 54, 733) to establish an
ellipsoidal lightcurve with a period of 22.60 +/- 0.02 days (2-sigma) and
a full amplitude of 0.04 magnitude. This period also shows up in
the individual data sets. A comparison with Mauder et al.'s (1978,
Mitt. Astron. Ges. 43, 227) radial-velocity curve suggests that superior
conjunction (x-ray source behind) occurred on 1978 July 7.6
+/- 1.1 UT. No periodic signal can be distinguished at 40.8 days
(White et al. 1978, Monthly Notices Roy. Astron. Soc. 184, 67P) or
its harmonics."
1978 December 22 (3317) Brian G. Marsden
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