3 August 2016 Performance updates of HAWK-I and preparation for the commissioning of the system GRAAL+HAWK-I
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Abstract
The High Acuity Wide field K-band Imager (HAWK-I) instrument is a cryogenic wide field imager operating in the wavelength range 0.9 to 2.5 microns. It has been in operations since 2007 on the UT4 at the Very Large Telescope Observatory in seeing-limited mode. In 2017-2018, GRound Layer Adaptive optics Assisted by Lasers module (GRAAL) will be in operation and the system GRAAL+HAWK-I will be commissioned. It will allow: deeper exposures for nearly point-source objects, or shorter exposure times for reaching the same magnitude, and/or deeper detection limiting magnitude. With GRAAL, HAWK-I will operate more than 80% of the time with an equivalent K-band seeing of 0.55" (instead of 0.7" without GRAAL). GRAAL is already installed and the operations without adaptive optics were commissioned in 2015. We discuss here the latest updates on performance from HAWK-I without Adaptive Optics (AO) and the preparation for the commissioning of the system GRAAL+HAWK-I.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Pascale Hibon, Jerome Paufique, Harald Kuntschner, Danuta Dobrzycka, Miska Le Louarn, Elena Valenti, Mark Neeser, Emanuela Pompei, Robin Arsenault, Ralf Siebenmorgen, Pierre-Yves Madec, Monika Petr-Gotzens, Carlos La Fuente, Josefina Urrutia, Javier Valenzuela, Roberto Castillo, Pedro Baksai, Cesar Enrique Garcia Dabo, Andreas Jost, Javier Argomedo, Johann Kolb, Mario Kiekebusch, Norbert Hubin, Philippe Duhoux, Ralf Dieter Conzelmann, Robert Donaldson, Sebastien Tordo, Stefan Huber, "Performance updates of HAWK-I and preparation for the commissioning of the system GRAAL+HAWK-I", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99080F (3 August 2016); doi: 10.1117/12.2231305; https://doi.org/10.1117/12.2231305
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