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KalAO the swift adaptive optics imager on the 1.2m Euler Swiss telescope in La Silla, Chile

Hagelberg, Janis and Restori, Nathanaël and Wildi, Francois and Chazelas, Bruno and Baranec, Christoph and Guyon, Olivier and Genolet, Ludovic and Sordet, Michaël and Riddle, Reed (2020) KalAO the swift adaptive optics imager on the 1.2m Euler Swiss telescope in La Silla, Chile. In: Adaptive Optics Systems VII. Proceedings of SPIE. No.11448. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 114487G. ISBN 9781510636835.

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KalAO is a natural guide star adaptive optics (AO) imager to be installed on the second Nasmyth focus of the 1.2m Euler Swiss telescope in La Silla, Chile. The initial design of the system is inspired on RoboAO with modifications in order to operate in natural guide star (NGS) mode. KalAO was built to search for binarity in planet hosting stars by following-up candidates primarily from the TESS satellite survey. The optical design is optimised for the 450-900 nm wavelength range and is fitted with SDSS g,r,i,z filters. The system is designed for wavefront control down to I-magnitude 11 stars in order to probe the same parameter space as radial velocity instruments such as HARPS and NIRPS. The principal components of the system are an 11x11 10.9 cm sub-apertures Electron Multiplying CCD (EMCCD) Shack-Hartmann wavefront sensor, a 140 actuators Microelectromechanical systems (MEMS) deformable mirror, a fast tip/tilt mirror, and a graphics processing unit (GPU) powered glycol cooled real-time computer. It is designed to run at up to 1.8kHz in order to detect companions as close as the 150mas visible-light diffraction limit. The real-time adaptive optics control is using the CACAO software running on GPUs. The instrument is planned for commissioning early 2021 in Chile if the covid restrictions are lifted.

Item Type:Book Section
Related URLs:
URLURL TypeDescription Paper
Hagelberg, Janis0000-0002-1096-1433
Wildi, Francois0000-0002-9216-4402
Baranec, Christoph0000-0002-1917-9157
Guyon, Olivier0000-0002-1097-9908
Riddle, Reed0000-0002-0387-370X
Additional Information:© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). This project is supported by SNSF through the Ambizione grant #PZ00P2_180098 (PI. Janis Hagelberg).
Funding AgencyGrant Number
Swiss National Science Foundation (SNSF)PZ00P2_180098
Subject Keywords:Adaptive optics, wave-front sensing, optics, astronomy, exoplanets
Series Name:Proceedings of SPIE
Issue or Number:11448
Record Number:CaltechAUTHORS:20201222-122132120
Persistent URL:
Official Citation:Janis Hagelberg, Nathanaël Restori, François Wildi, Bruno Chazelas, Christoph Baranec, Olivier Guyon, Ludovic Genolet, Michaël Sordet, and Reed Riddle "KalAO the swift adaptive optics imager on the 1.2m Euler Swiss telescope in La Silla, Chile", Proc. SPIE 11448, Adaptive Optics Systems VII, 114487G (13 December 2020);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107256
Deposited By: Tony Diaz
Deposited On:22 Dec 2020 20:31
Last Modified:16 Nov 2021 19:01

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