20 October 2004 LLiST: a new-star tracker camera for tip-tilt correction at IOTA
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Abstract
The tip-tilt correction system at the Infrared Optical Telescope Array (IOTA) has been upgraded with a new star tracker camera. The camera features a backside-illuminated CCD chip offering doubled overall quantum efficiency and a four times higher system gain compared to the previous system. Tests carried out to characterize the new system showed a higher system gain with a lower read-out noise electron level. Shorter read-out cycle times now allow to compensate tip-tilt fluctuations so that their error imposed on visibility measurements becomes comparable to, and even smaller than, that of higher-order aberrations.
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Peter A. Schuller, Peter A. Schuller, Marc G. Lacasse, Marc G. Lacasse, Donald S. Lydon, Donald S. Lydon, William H. McGonagle, William H. McGonagle, Ettore Pedretti, Ettore Pedretti, Robert K. Reich, Robert K. Reich, F. Peter Schloerb, F. Peter Schloerb, Wesley Arthur Traub, Wesley Arthur Traub, } "LLiST: a new-star tracker camera for tip-tilt correction at IOTA", Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); doi: 10.1117/12.552105; https://doi.org/10.1117/12.552105
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