Data and Instrumentation Analysis Techniques and Methods

Point spread function reconstruction validated using on-sky CANARY data in multiobject adaptive optics mode

[+] Author Affiliations
Olivier A. Martin, Carlos M. Correia, Benoit Neichel

Aix Marseille Université, CNRS, LAM, Laboratoire d’Astrophysique de Marseille, 13888 Marseille, France

Eric Gendron, Gerard Rousset, Damien Gratadour, Fabrice Vidal

Université Paris Diderot - Sorbonne Paris Cité, LESIA, Observatoire de Paris - Paris Sciences et Lettres, CNRS, Université P. et M. Curie - Sorbonne Universités, 5 pl. Janssen, 92190 Meudon, France

Tim J. Morris, Alastair G. Basden, Richard M. Myers

Durham University, Centre for Advanced Instrumentation, South Road, Durham DH1 3LE, United Kingdom

Thierry Fusco

Aix Marseille Université, CNRS, LAM, Laboratoire d’Astrophysique de Marseille, 13888 Marseille, France

ONERA (Offce National d’Etudes et de Recherches Aérospatiales), B.P.72, F-92322 Châtillon, France

J. Astron. Telesc. Instrum. Syst. 2(4), 048001 (Oct 31, 2016). doi:10.1117/1.JATIS.2.4.048001
History: Received July 11, 2016; Accepted October 6, 2016
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Abstract.  In preparation of future multiobject spectrographs (MOS) whose one of the major role is to provide an extensive statistical studies of high redshifted galaxies surveyed, the demonstrator CANARY has been designed to tackle technical challenges related to open-loop adaptive optics (AO) control with jointed Natural Guide Star and Laser Guide Star tomography. We have developed a point spread function (PSF) reconstruction algorithm dedicated to multiobject adaptive optics systems using system telemetry to estimate the PSF potentially anywhere in the observed field, a prerequisite to postprocess AO-corrected observations in integral field spectroscopy. We show how to handle off-axis data to estimate the PSF using atmospheric tomography and compare it to a classical approach that uses on-axis residual phase from a truth sensor observing a natural bright source. We have reconstructed over 450 on-sky CANARY PSFs and we get bias/1-σ standard-deviation (std) of 1.3/4.8 on the H-band Strehl ratio (SR) with 92.3% of correlation between reconstructed and sky SR. On the full-width at half-maximum, we get, respectively, 2.94 mas, 19.9 mas, and 88.3% for the bias, std, and correlation. The reference method achieves 0.4/3.5/95% on the SR and 2.71 mas/14.9 mas/92.5% on the FWHM for the bias/std/correlation.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Olivier A. Martin ; Carlos M. Correia ; Eric Gendron ; Gerard Rousset ; Damien Gratadour, et al.
"Point spread function reconstruction validated using on-sky CANARY data in multiobject adaptive optics mode", J. Astron. Telesc. Instrum. Syst. 2(4), 048001 (Oct 31, 2016). ; http://dx.doi.org/10.1117/1.JATIS.2.4.048001


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