UH 88英寸望远镜双光束成像偏振计的调试
Commissioning of the Dual-Beam Imaging Polarimeter for the UH 88-inch telescope
摘要：
本文介绍了双光束成像偏振计（DBIP）的设计、标定方法和初步结果。这一新仪器旨在测量点源，特别是主带小行星的光学偏振特性。该仪器连接Tek 2048 x2048相机和夏威夷大学的88英寸望远镜，可供设施使用。使用DBIP，我们能够测量线性偏振，每次测量的1-sigma泊松信号噪声为0.03%，系统误差为0.06% +/-0.02%。此外，我们讨论的偏振的小行星16 Psyche这是作为仪器调试的一部分。我们确认Psyche的负偏振为-1.037% +/-0.006%，但发现在0.05%偏振水平以上的旋转信号没有显著的调制。
英文摘要：
In this paper we present the design, calibration method, and initial results of the Dual-Beam Imaging Polarimeter (DBIP). This new instrument is designed to measure the optical polarization properties of point sources, in particular Main Belt asteroids. This instrument interfaces between the Tek 2048x2048 camera and the University of Hawaii's 88-inch telescope, and is available for facility use. Using DBIP we are able to measure linear polarization with a 1-sigma Poisson signal noise of 0.03% per measurement and a systematic error of order 0.06% +/- 0.02%. Additionally, we discuss measurements of the polarization of the asteroid 16 Psyche which were taken as part of the instrument commissioning. We confirm Psyche's negative polarization of -1.037% +/- 0.006% but find no significant modulation of the signal with rotation above the 0.05% polarization level.
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