@inproceedings{5dae49e993f84bf79b29c541af399827,
title = "Increasing sky coverage with the Gemini North ALTAIR/LGS AO system",
abstract = "The Gemini North (GN) AO system, Altair, has been routinely operating in LGS mode since 2007. Due to the initial optical design, the NGS field-of-view (FoV) is limited to a radius ~ 25{"} which limits the potential science. To improve this, we have tested the AO/LGS operation using a peripheral wavefront sensor (PWFS) whose patrol field is ~ 4'-7' from the target. This expanded NGS FoV permits greater sky coverage but with decreased resolution, FWHM ~ 0.1{"} - 0.2{"} making this mode very suitable for non-imaging spectrographic and integral field unit observations. We present the hardware and software upgrades to PWFS and Altair as well as the software necessary for making this observing mode a routine and integral part of GN operations. Characterization and performance of this new operation mode, known as LGS+P1, are presented.",
keywords = "Adaptive optics, Laser guide star, Na laser spectrum, Off-axis guiding, Super-seeing",
author = "Christou, {Julian C.} and Maxime Boccas and Angelic Ebbers and McDermid, {Richard M.} and Richard Oram and Chadwick Trujillo and Brian Walls",
year = "2012",
doi = "10.1117/12.925507",
language = "English (US)",
isbn = "9780819491480",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Adaptive Optics Systems III",
note = "Adaptive Optics Systems III ; Conference date: 01-07-2012 Through 06-07-2012",
}