LLiST - a new star tracker camera for tip-tilt correction at IOTA
  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. 
P. A. Schuller (a), M. G. Lacasse (b), D. Lydon (c), W. H. McGonagle   (d), E. Pedretti (e), R. K. Reich (d), F. P. Schloerb...