A 16 channel Array Infrared Prism Spectro-Polarimeter for Astronomical Observation.

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  • SHIBA Hisashi
    Department of Astronomy, the University of Tokyo
  • TAKAMI Hideki
    Communication Research Laboratory, Ministry of Posts and Telecommunications
  • SATO Shuji
    Division of Optical and Infrared Astronomy, National Astronomical Observatory

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Other Title
  • 天文観測用１６素子アレイ・プリズム分光偏光計
  • テンモン カンソクヨウ 16 ソシ アレイ プリズム ブンコウ ヘンコウケイ

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Abstract

We describe construction of a 16 channel, near infrared spectro-polarimeter capable of simultaneous measurement of polarimetry from 0.9 to 2.5 μm with low spectral resolution and present the polarimetric data obtained with it. This instrument employs a sapphire prism as a disperser, showing the characteristics of high throughputs and flat polarization both in degrees and position angles over the wavelength region. This is the first astronomical spectro-polarimeter using the multi-channel infrared array detector. This prism spectrometer, attached to several telescopes, are successfully producing a number of data since completion in 1990. We present the data of stars in evolving stages and discuss future developments of spectro-polarimeters using array detector.

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