Published July 6, 2018
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Thermal-infrared adaptive optics imaging- and spectro-polarimetry with the infrared camera and spectrograph (IRCS) for the Subaru Telescope
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.
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.Attached Files
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Additional details
- Eprint ID
- 92121
- Resolver ID
- CaltechAUTHORS:20190107-145719562
- Created
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2019-01-07Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 10702