Central Bureau for Astronomical Telegrams
IAUC 3169: 1977t; X-RAY SOURCES; MARS
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Read IAUC 3170
Circular No. 3169
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
COMET LOVAS (1977t)
The following approximate position is from a plate taken by G.
Schwartz with the 155-cm reflector at Harvard's Agassiz Station:
1978 UT R. A. (1950) Decl.
Feb. 1.23808 5 09.0 +77 01
The object is of stellar appearance. M. Lovas, Konkoly Observatory,
confirms that the object appears essentially stellar on Jan. 2 and
5. The Feb. 1 position confirms the basic conclusion on IAUC 3165.
The ephemeris should be corrected by dR.A. = -2m, dDecl. = +18' on Feb. 21.
X-RAY SOURCES
HEAO-1 experimenters G. Share, K. Wood, J. Meekins, S. Shulman
and coworkers W. Evans, D. Yentis, D. McNutt, R. Hedler, R. Kinzer,
J. Samimi, N. Johnson, E. Byram, T. Chubb and H. Friedman, Naval
Research Laboratories, report the detection of a new x-ray source
near Cen X-3. The source, H1122-59, was observed during Jan. 11-20
and was clearly resolved from Cen X-3 and other sources in its vicinity.
Its intensity was observed to be ~ 10**-10 erg cm**-2 s**-1 in
the 1-10-keV range. The corners of its error box are given by R.A. =
11h19m.8, 11h23m.0, 11h22m.4, 11h25m.6 and Decl. = -59o05', -58o42', -59o27',
-59o01' (equinox 1950.0), respectively. The supernova remnant MSH
11-54 is consistent with the new x-ray source's location.
Wood, Share, Shulman, Meekins and the same coworkers report
the detection of a new x-ray source about 2o from Cas A. The new
source, H2309+59, appeared to be variable during the observation
period Jan. 11-20. The maximum intensity observed was ~ 10**-10 erg
cm**-2 s**-1 in the 1-10-keV range. The corners of its error box are
given by R.A. = 23h08m.8, 23h05m.5, 23h12m.0, 23h08m.4 and Decl. = +59o18',
+59o44', +59o42', +60o07' (equinox 1950.0), respectively. The Mira
variable V Cas lies within this region.
Corrigendum. On IAUC 3163, the last line of the first paragraph
on 4U 0115+63 should begin "11'.8 north and 1'.0 east of..."
MARS
R. L. Bishop, Physics Department, Acadia University, writes
that he independently detected an abnormally light area in the
Tempe area of Mars on Jan. 25.17 UT (cf. IAUC 3164).
1978 February 2 (3169) Brian G. Marsden
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