LLiST - a new star tracker camera for tip-tilt correction at IOTA

Details LLiST - a new star tracker camera for tip-tilt correction at IOTA LLiST - a new star tracker camera for tip-tilt correction at IOTA

2004-08-03

arxiv.org/abs/astro-ph/0408038v1

Astronomy and Astrophysics

Astrophysics

To be published in "New Frontiers in Stellar Interferometry", W. A. Traub, ed., SPIE Proceedings Series, Vol. 5491, paper [549

Scientific paper

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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