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Scintillation correction for astronomical photometry on large and extremely large telescopes with tomographic atmospheric reconstruction.

Osborn, James (2015) 'Scintillation correction for astronomical photometry on large and extremely large telescopes with tomographic atmospheric reconstruction.', Monthly notices of the Royal Astronomical Society., 446 (2). pp. 1305-1311.

Abstract

We describe a new concept to correct for scintillation noise on high-precision photometry in large and extremely large telescopes using telemetry data from adaptive optics (AO) systems. Most wide-field AO systems designed for the current era of very large telescopes and the next generation of extremely large telescopes require several guide stars to probe the turbulent atmosphere in the volume above the telescope. These data can be used to tomographically reconstruct the atmospheric turbulence profile and phase aberrations of the wavefront in order to assist wide-field AO correction. If the wavefront aberrations and altitude of the atmospheric turbulent layers are known from this tomographic model, then the effect of the scintillation can be calculated numerically and used to normalize the photometric light curve. We show through detailed Monte Carlo simulation that for an 8 m telescope with a 16 × 16 AO system we can reduce the scintillation noise by an order of magnitude.

Item Type:Article
Additional Information:
Keywords:Atmospheric effects, Instrumentation: adaptive optics, Methods: observational, Techniques: photometric.
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Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1093/mnras/stu2175
Publisher statement:This article has been accepted for publication in Monthly notices of the Royal Astronomical Society. © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Date accepted:16 October 2014
Date deposited:15 April 2015
Date of first online publication:11 November 2014
Date first made open access:No date available

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