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Thermal-infrared adaptive optics imaging- and spectro-polarimetry with the infrared camera and spectrograph (IRCS) for the Subaru Telescope

Terada, Hiroshi and Honda, Mitsuhiko and Hattori, Takashi and Kudo, Tomoyuki and Hashimoto, Jun and Watanabe, Makoto (2018) Thermal-infrared adaptive optics imaging- and spectro-polarimetry with the infrared camera and spectrograph (IRCS) for the Subaru Telescope. In: Ground-based and Airborne Instrumentation for Astronomy VII. Proceedings of SPIE. No.10702. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 107022Y. ISBN 9781510619579. http://resolver.caltech.edu/CaltechAUTHORS:20190107-145719562

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Abstract

A thermal-infrared polarimetric capability of the Infrared Camera and Spectrograph (IRCS) for the Subaru Telescope is described. A new half-wave retarder for the thermal-infrared band in 2–5 µm is introduced into the Waveplate Unit of the Nasmyth platform on the infrared side of the telescope to realize imaging- and low resolution spectro-polarimetry in that wavelength region. Through day-time calibrations using a wire-grid polarizer, the peak efficiency of the polarization is found to be 90-98% consistently in both imaging- and spectro- polarimetry in the thermal-infrared bands. In 2016 May and 2017 June, two engineering observing runs have been carried out to verify the on-sky performance.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2313303DOIArticle
Additional Information:© 2018 Society of Photo-optical Instrumentation Engineers (SPIE). We wish to thank the support of the science operations and instrument maintenance staff of the Subaru Telecope Project, in particular T.-S. Pyo, J. Bulger, J. H. Kim, M. Wung, and M. Weber. We also thank M. Tamura and the HiCIAO group for providing with the waveplate unit originally developed for the HiCIAO instrument at the Nasmyth focus of the Subaru Telescope.
Subject Keywords:polarimetry, adaptive optics, thermal infrared, imaging, spectroscopy, dust, protoplanetary disk, polarimetric differential technique
Record Number:CaltechAUTHORS:20190107-145719562
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20190107-145719562
Official Citation:Hiroshi Terada, Mitsuhiko Honda, Takashi Hattori, Tomoyuki Kudo, Jun Hashimoto, Makoto Watanabe, "Thermal-infrared adaptive optics imaging- and spectro-polarimetry with the Infrared Camera and Spectrograph (IRCS) for the Subaru Telescope," Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107022Y (6 July 2018); doi: 10.1117/12.2313303
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92121
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:07 Jan 2019 23:22
Last Modified:07 Jan 2019 23:22

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