Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-09-12
Astronomy and Astrophysics
Astrophysics
16 pages, 5 figures, accepted for publication in ExA
Scientific paper
10.1023/A:1013117110998
OPTIMA is a small, versatile high-speed photometer which is primarily intended for time resolved observations of young high energy pulsars at optical wavelengths. The detector system consists of eight fiber fed photon counters based on avalanche photodiodes, a GPS timing receiver, an integrating CCD camera to ensure the correct pointing of the telescope and a computerized control unit. Since January 1999 OPTIMA proves its scientific potential by measuring a very detailed lightcurve of the Crab Pulsar as well as by observing cataclysmic variable stars on very short timescales. In this article we describe the design of the detector system focussing on the photon counting units and the software control which correlates the detected photons with the GPS timing signal.
Kanbach Gottfried
Schrey F. F.
Straubmeier Christian
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