Central Bureau for Astronomical Telegrams
IAUC 3652: X-RAY/OPTICAL/INFRARED/RADIO Obs; Occn OF SAO 187124 BY (88); Corr
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Circular No. 3652
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
X-RAY/OPTICAL/INFRARED/RADIO OBSERVATIONS
W. H. G. Lewin writes: "M. Oda and the Hakucho team will make
time available on the Hakucho satellite for simultaneous x-ray,
optical, infrared and radio observations of x-ray burst sources,
bright bulge sources and transients during 1982. The observations
will be coordinated at M.I.T. A substantial fraction of the time
from April to August will be dedicated to these coordinated observations.
Exact dates and targets will depend on the responses that
M.I.T. receives from interested observers; they will be directly
communicated to the observers. The candidate bursters will be
selected from those which will then be burst-active, but the angle
between the source and the sun must be kept between 125o and 150o
(spacecraft constraints). Possible targets will include the
bursters MXB1636-53 (to date, ten optical and x-ray bursts have been
observed simultaneously from this object, which may have an orbital
period of ~ 4 hr; cf. IAUC 3628), MXB1735-44 (which may have an
orbital period of 4.3 hr; cf. IAUC 3615); and GX 17+2 (IAUC 3624).
During 1982 Apr.-Aug. (but not June), we will concentrate on the
Rapid Burster MXB1730-335, which was not active when x-ray
observations were made intermittently during 1981 Apr. -May and July.
Simultaneous observations particularly in the infrared and the radio
are encouraged. Observers should contact me at Space Research
Center, Room 37-627, Massachusetts Institute of Technology, Cambridge,
MA 02139, U.S.A.; telephone 617-253-4282; telex 92-1473 (MIT CAM).
Hakucho will also make extensive observations of x-ray pulsars
whenever time is available in 1982. Proposals for simultaneous optical
and radio observations will be welcomed."
OCCULTATION OF SAO 187124 BY (88) THISBE
The following additional observations have been reported of
the occultation by (88) Thisbe (cf. IAUC 3642) on Oct. 7: start
2h01m44s.5 UT, end 2h01m55s.0 (Edgar and Elizabeth Everhart, Chamberlin
Observatory field station); start 2n01m445.9, end 2h01m52s8 (P.
Maley and R. Petersen, Cheyenne, WY; instantaneous disappearance;
slow reappearance took 0s.3).
CORRIGENDUM
On IAUC 3605, Satellites of Saturn, line 5, for IAUC 3603 read
IAUC 3602.
1981 December 17 (3652) Daniel W. E. Green
Read IAUC 3653
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