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.
@article{arxiv.astro-ph/0408038,
title = {LLiST - a new star tracker camera for tip-tilt correction at IOTA},
author = {P. A. Schuller and M. G. Lacasse and D. Lydon and W. H. McGonagle and E. Pedretti and R. K. Reich and F. P. Schloerb and W. A. Traub},
journal= {arXiv preprint arXiv:astro-ph/0408038},
year = {2013}
}
Comments
To be published in "New Frontiers in Stellar Interferometry", W. A. Traub, ed., SPIE Proceedings Series, Vol. 5491, paper [5491-126]; 10 pages, 6 figures, 1 table; Latex spie class, uses packages graphicx and url; bib style spiebib; keywords: interferometry, tip-tilt correction