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Polarization calibration techniques and scheduling for the Daniel K. Inouye Solar Telescope

Published online by Cambridge University Press:  24 July 2015

David F. Elmore
David F. Elmore*
Affiliation:
National Solar Observatory, 3665 Discovery Drive, Boulder, Colorado, USA email: [email protected]
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Abstract

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The Daniel K. Inouye Solar Telescope (DKIST), formerly Advanced Technology Solar Telescope when it begins operation in 2019 will be by a significant margin Earth's largest solar research telescope. Science priorities dictate an initial suite of instruments that includes four spectro-polarimeters. Accurate polarization calibration of the individual instruments and of the telescope optics shared by those instruments is of critical importance. The telescope and instruments have been examined end-to-end for sources of polarization calibration error, allowable contributions from each of the sources quantified, and techniques identified for calibrating each of the contributors. Efficient use of telescope observing time leads to a requirement of sharing polarization calibrations of common path telescope components among the spectro-polarimeters and for those calibrations to be repeated only as often as dictated by degradation of optical coatings and instrument reconfigurations. As a consequence the polarization calibration of the DKIST is a facility function that requires facility wide techniques.

Keywords

PolarimetryTelescope CalibrationSolar Polarimetry
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Symposium S305: Polarimetry: From the Sun to Stars and Stellar Environments , December 2014 , pp. 102 - 107
Copyright
Copyright © International Astronomical Union 2015 

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