6 August 2014 First performance of the GeMS+GMOS system
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Abstract
During the 2012 commissioning of the Gemini MCAO System (GeMS) in Gemini South Observatory, we briefly explored the performance improvement brought by pairing GeMS with the Gemini Multi-Object Spectrograph (GMOS), compared to GMOS in natural seeing mode. GMOS is an instrument sensitive in the visible band with imaging and spectroscopic capabilities, hence pushing MCAO toward the visible, a mode for which it was not specifically designed. We report in this paper the first results obtained with the GeMS +GMOS pair. Several globular clusters were observed in imaging mode only. We have derived performance in term of FWHM and determined the improvement against natural seeing. We also obtain photometric, relative and absolute astrometric precision for the AO enhanced images. We also studied the influence of the NGS constellation on the photometric performance. Finally, we also looked at the expected performance of the GeMS+GMOS system once the CCD upgrade, scheduled during 2014, will occur.
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Pascale Hibon, Pascale Hibon, Benoit Neichel, Benoit Neichel, Vincent Garrel, Vincent Garrel, Benjamin Prout, Benjamin Prout, Francois Rigaut, Francois Rigaut, Alice Koning, Alice Koning, Gaetano Sivo, Gaetano Sivo, German Gimeno, German Gimeno, Rodrigo Carrasco, Rodrigo Carrasco, Claudia Winge, Claudia Winge, Peter Pessev, Peter Pessev, Andrew Serio, Andrew Serio, Gustavo Arriagada, Gustavo Arriagada, } "First performance of the GeMS+GMOS system", Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91478T (6 August 2014); doi: 10.1117/12.2055196; https://doi.org/10.1117/12.2055196
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