28 July 2010 A fast EM-CCD camera as performance monitor for the SOFIA Telescope with science capabilities
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Abstract
One of the most challenging requirements for the Stratospheric Observatory for Infrared Astronomy (SOFIA) is the pointing stability of 0.2 arcseconds (rms) of its 2.7 m telescope onboard a Boeing 747SP. To support the analysis of pointing disturbances in flight, an EM-CCD camera has been prepared to measure star positions in the focal plane at speeds up to about 400 frames per second. Currently, the camera is planned to be mounted for special engineering flights, a procedure that requires overhead for mechanical work and optical alignment, including star tests on the night sky from the ground. This paper summarizes the status of the project and explores possibilities to mount the camera permanently to the SOFIA telescope. Permanent mounting would make it available for continuous performance monitoring and as a trouble shooting tool if needed. In addition, the camera could serve as a versatile high speed photometer in the visible and very near IR wavelength range for astronomical observations, e.g. for the photometry of stellar occultations and of transits of extra-solar planets.
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Jürgen Wolf, Jürgen Wolf, Hans-Peter Röser, Hans-Peter Röser, Alfred Krabbe, Alfred Krabbe, Enrico Pfüller, Enrico Pfüller, } "A fast EM-CCD camera as performance monitor for the SOFIA Telescope with science capabilities", Proc. SPIE 7733, Ground-based and Airborne Telescopes III, 77330P (28 July 2010); doi: 10.1117/12.856372; https://doi.org/10.1117/12.856372
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