Central Bureau for Astronomical Telegrams
IAUC 4207: EXO 020528+1454.8; PLANETARY Occns
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Circular No. 4207
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 617-495-7244/7440/7444
EXO 020528+1454.8
F. A. Cordova, Los Alamos National Laboratory, writes: "The
soft x-ray source EXO 020528+1454.8 reported by Hudec and Wenzel
(IAUC 4172) has actually been detected previously as the
serendipitous Einstein x-ray source 1E 0205+149 and optically
identified with a close (~ 4") pair of mag 16 dM4.5e stars by Reichert
et al. (1982, Ap.J. 260, 437, although the position given there
for the dMe pair was for equinox 1979.9, not the stated 1950.0).
From a Palomar Sky Survey plate S. R. Rosen (private communication)
has determined the position of the centroid of the pair as R.A.
= 2h05m28s25, Decl. = +14deg54'33" (equinox 1950.0, epoch 1950.8,
uncertainty < 1"). The pair of stars is almost certainly the Lowell
proper-motion object G035-027. Two Einstein Observatory imaging
observations included the x-ray source in the field of view.
Sequence No. I3817, made on 1979 July 23, gave a source intensity of
0.036 +/- 0.009 IPC cts/s, and sequence No. I7614, made on 1980 July
19-20, gave 0.022 +/- 0.002 IPC cts/s. Examination of the lightcurve
from I7614, which represents 23 000 s of observing time spanning
26 hr, shows no flaring or other long-term variability on timescales
longer than the 100-s binning used for the analysis. IPC
spectral data indicate that the source temperature is ~ 10Y K."
PLANETARY OCCULTATIONS
A. Brahic, I. Grenier, R. McLaren and B. Grundseth report
their observation of the Apr. 23 occultation N39 by Neptune (Mink
and Klemola 1985, A.J. 90, 1894). Continuous photometry at 2.2 micron
was obtained with the 3.6-m Canada-France-Hawaii telescope at
Mauna Kea from 11h06m to 15h00m UT with 50-ms sampling. The actual
occultation lasted from 13h01m to 13h35m (preliminary analysis), and
no obvious secondary events are visible in the raw data.
J. C. Bhattacharyya, Indian Institute of Astrophysics, telexes
that R. Vasundhara and K. Kuppuswamy photoelectrically recorded
the Apr. 26 occultation of AGK3 +23 1108 by (1) Ceres (Wasserman
et al. 1985, A.J. 90, 2124) with the 1-m telescope at Vainu Bappu
Observatory, Kavalur. The event lasted from 16h56m12s to 16h58m07s
(+ 1s) UT, with a 0.24 +/- 0.05 mag drop in light (V filter).
D. J. Tholen informs us that the Pluto/Charon occultation P4
on Apr. 30 (IAUC 4203, 4206) did not occur at Mauna Kea.
1986 May 5 (4207) Brian G. Marsden
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