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Analysis of on-sky MOAO performance of CANARY using natural guide stars
- Source :
- Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, EDP Sciences, 2014, 569, pp.A16. ⟨10.1051/0004-6361/201322991⟩, Astronomy & astrophysics, 2014, Vol.569, pp.A16 [Peer Reviewed Journal], Astronomy and Astrophysics-A&A, 2014, 569, pp.A16. ⟨10.1051/0004-6361/201322991⟩
- Publication Year :
- 2014
- Publisher :
- HAL CCSD, 2014.
-
Abstract
- The first on-sky results obtained by CANARY, the Multi-Object Adaptive Optics (MOAO) demonstrator, are analysed. The data were recorded at the William Herschel Telescope, at the end of September 2010. We describe the command and calibrations algorithms used during the run and present the observing conditions. The processed data are MOAO-loop engaged or disengaged slope buffers, comprising the synchronised measurements of the four Natural Guide Stars (NGS) wavefront sensors running in parallel, and near Infra-Red (IR) images. We describe the method we use to establish the error budget of CANARY. We are able to evaluate the to- mographic and the open loop errors, having median values around 216 nm and 110 nm respectively. In addition, we identify an unexpected residual quasi-static field aberration term of mean value 110 nm. We present the detailed error budget analysed for three sets of data for three different asterisms. We compare the experimental budgets with the numerically simulated ones and demonstrate a good agreement. We find also a good agreement between the computed error budget from the slope buffers and the measured Strehl ratio on the IR images, ranging between 10% and 20% at 1 530 nm. These results make us confident in our ability to establish the error budget of future MOAO instruments.<br />in press A&A (2014)
- Subjects :
- Wavefront
[PHYS]Physics [physics]
media_common.quotation_subject
Strehl ratio
FOS: Physical sciences
Astronomy and Astrophysics
Ranging
Residual
Stars
Space and Planetary Science
Sky
William Herschel Telescope
14. Life underwater
Adaptive optics
Astrophysics - Instrumentation and Methods for Astrophysics
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Instrumentation and Methods for Astrophysics (astro-ph.IM)
ComputingMilieux_MISCELLANEOUS
Mathematics
media_common
Remote sensing
Subjects
Details
- Language :
- English
- ISSN :
- 00046361
- Database :
- OpenAIRE
- Journal :
- Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, EDP Sciences, 2014, 569, pp.A16. ⟨10.1051/0004-6361/201322991⟩, Astronomy & astrophysics, 2014, Vol.569, pp.A16 [Peer Reviewed Journal], Astronomy and Astrophysics-A&A, 2014, 569, pp.A16. ⟨10.1051/0004-6361/201322991⟩
- Accession number :
- edsair.doi.dedup.....f281b41bd0713ee3cd2d657e7acf8fe3