Observations of the Peculiar X-Ray Binary
2S0114+65/LSI +65 10
Summary
The x-ray source 2S0114+65 was first
observed in 1977 by the SAS 3 galactic survey. A feature of the x-ray
source is its 2.78 hour periodicity. In various
studies, models of the system were developed which include the
possibility that the Be/shell star member of the system is the source
of the pulsations.
In
the included figure, the Be star LSI +65 10 undergoes matter wave
emission.
The companion star in an elliptical orbit, passes through these matter
waves
and emits x-rays due to the accretion of the stellar material on its
surface.
State
of the Project
The x-ray binary was to be observed
in December of 1995 from an orbiting x-ray
satellite, RXTE, and from the ground in optical wavelengths. However,
due to a setback in the launching of the rocket that carried the
satellite into orbit,
the simultaneous observation of the x-ray binary has been postponed
until
sometime in October.
Until October, the
High Energy Astrophysics Group will be collecting photometric
data of the x-ray binary. This will serve to monitor the binary for any
changes or trends in the optical pulsations from the system.
Photometric data is being collected (slowly) through the use of the
Cumberland Observatory
in West Lafayette, Indiana via a 16 inch Meade LX200 telescope with
Santa
Barbara Instruments Group ST-6 CCD camera. The collection is proceeding
slowly
due to difficulties with the weather, instrumentation trouble and light
pollution from the surrounding community.
- Taylor,
Finley, Kurt, Koenigsberger. "Optical Photometric Variability of
2S0114+65." The Astronomical Journal 109
(1), 396-400.
- Finley,
Taylor, Belloni. "ROSAT/Optical Observations of 2S0114+65: A Study of
the 2.8 Hour Periodic Outburts." The Astrophysical Journal
429, 356-61.
- Finley,
Belloni, Cassinelli. "Periodic Outbursts in the Peculiar X-Ray Binary
2S0114+65" Astronomy and Astrophysics 262,
L25-8.
- Apparao,
Bisht, Singh. "EXOSAT Observations of the X-Ray Source 2S0114+65." The
Astrophysical Journal 371, 772-5.
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Astronomy
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