Central Bureau for Astronomical Telegrams
IAUC 4342: 4U 0115+63 AND X-RAY N; 1987A; N And 1986
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Circular No. 4342
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
4U 0115+63 AND X-RAY NOVA
F. Makino, Institute of Space and Astronautical Science,
Tokyo, reports on behalf of the Ginga Team that the Ginga all-sky
monitor (ASM) has detected an outburst of the transient x-ray
source 4U 0115+63 and an x-ray nova at R.A. = 13h53m.0, Decl. = -64.4
(equinox 1950.0, uncertainty 0.2 deg). Both sources had an intensity
of about 300 mCrab on Feb. 25 when ASM operation started. The
intensity of the x-ray nova has been almost constant, while that
of 4U 0115+63 gradually decreased to Mar. 7. The error circle of
the nova includes MX 1353-64 (Markert et al. 1977, Ap.J. 218,
801). The recurrence of the outburst of 4U 0115+63 agrees with
the prediction by Whitlock et al. (1985, Bull. AAS 17, 849).
SUPERNOVA 1987A IN THE LARGE MAGELLANIC CLOUD
J. E. Steiner, Instituto de Pesquisas Espaciais, Sao Jose dos
Campos, informs us that his institute operates a balloon-launching
facility at Cachoeira Paulista, Brazil (long. = -45, lat. -23 ). The
facility is operational and able to launch payloads of up to 2
tonnes. It is open to any group interested in launching stratospheric
balloons from the southern hemisphere. Groups interested
in observing SN 1987A at balloon ceiling conditions, with or
without local scientific collaboration, should contact him at
telephone 55/123-22-9977, ext. 383, or telex (Brazil) 1233530 INPE BR.
J. W. Menzies, South African Astronomical Observatory,
reports: "From spectra obtained on each night during Feb. 24-Mar. 2
I find that the velocity of approach of the broad H alpha absorption
line decreased linearly from about 18 300 km/s on Feb. 24.90 UT at a
daily rate of about 780 km/s. R. M. Catchpole has interpreted UBVRI-
JHKL photometry obtained at SAAO over the same period as arising
from an expanding, cooling blackbody and finds the same deceleration
rate, if he assumes a distance modulus of 18.5 for the LMC
and a foreground absorption of Av = 0.6 mag."
NOVA ANDROMEDAE 1986
Photoelectric magnitudes by R. Monella (M), Covo; and G.
Favero, F. Fiamoi and G. A. Milani (F), Padua, Italy: Jan. 20.74
UT, V = 11.24, B-V = +0.49 (F); 21.75, V = 11.32, B-V = +0.52, U-B
= -0.53 (F); 24.868, V = 11.67, B-V = +0.55, U-B = -0.53 (M).
1987 March 12 (4342) Brian G. Marsden
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