Central Bureau for Astronomical Telegrams
IAUC 3164: RADIO COUNTERPART FOR gamma-RAY SOURCE CG 135+1; 1978a; MARS
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Circular No. 3164
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK Telex: 921428
Telephone: (617) 864-5758
RADIO COUNTERPART FOR gamma-RAY SOURCE CG 135+1
P. C. Gregory and R. Taylor, University of British Columbia,
report the discovery of a highly variable radio source within the 1o
error circle of the gamma-ray source CG 135+1 (IAUC 2992, 3021; Hermsen
et al. 1977, Nature 269, 494). The radio source, designated GT
0236+610, was found during a survey of the Galaxy for variable
radio sources carried out with the N.R.A.O. 91-m telescope at a
wavelength of 6 cm during 1977 Aug. 12-30. During Aug. 12-25 the
source's flux density ranged from < 15 to 75 mJy; there followed
an outburst of ~ 5 days duration, the flux density reaching a maximum
of 285 mJy on Aug. 27. The radio coordinates of the source are
R.A. = 2h36m41s +/- 8s, Decl. = +61o01'24" +/- 30" (equinox 1950.0).
COMET WEST (1978a)
R. M. West, European Southern Observatory, provides further
semiaccurate positions by G. and O. Pizarro and himself:
1978 UT R. A. (1950) Decl.
Jan. 17.34397 14 31 10.2 -13 11 28
18.33016 14 31 15.5 -13 06 09
19.32604 14 31 20.0 -13 00 42
On a 30-min IIIa-J exposure with the 360-cm reflector on Jan. 18.3
J. Surdej describes the comet as an approximately spherical coma
from which there extends a faint tail ~ 5' southward. The tail
appears as a wide, diffuse fan, with some possible enhanced activity
starting from the coma on the southwestern side. The remark about
emission at 4990 A (IAUC 3162) should be disregarded.
MARS
S. O'Meara, Cambridge, Massachusetts, reports that observations
on Jan. 17.07 UT with the Harvard Observatory's 23-cm refractor
showed a duststorm bordering on Mare Acidallum and Mare Boreum,
extending into Tempe. Nilokeras and Tanais were obscured. The
storm ranges between long. 40o and 60o, lat. 30o and 50o. The observation
was confirmed by J. Long with the Harvard refractor and by M.
Mattei in Littleton, Massachusetts.
1978 January 19 (3164) Brian G. Marsden
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