Multi-wavelength SimultaneouS High throughput Imager and polarimeter (MuSaSHI): development and its performance
Multi-wavelength SimultaneouS High throughput Imager and polarimeter (MuSaSHI): development and its performance
复制标题
多波长同时高通量成像仪和旋光仪 (MuSaSHI)：开发及其性能
DOI：
10.1117/12.2560903
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Akitaya Hiroshi
中科院分区：
文献类型：
--
作者：
Oasa Yumiko;Ushioda Kazutoshi;Shibata Yoshiki;Seino Genta;Kino Masaru;Akitaya Hiroshi
本文介绍了一种多波长同时高通量成像仪和偏振仪的研制和性能评价。科学驱动因素是对变星、凌日行星和小行星等时变天文现象进行高精度多色光度学研究。MuSaSHI被设计安装在琦玉大学的SaCRA望远镜上，专用于三个光学波段（r：550至680 nm，i：700至810 nm，z：820至1000 nm）的相对宽视场成像和偏振测量。该仪器配备有三个背照式薄型e2 v CCD，可提供同时的r、i、z图像，视场为12.8× 12.4弧分，像素尺度为0.73弧秒。MuSaSHI的光学系统仅由两个分色镜和三个带通滤波器组成，没有透镜，因此总吞吐量很高，特别是在z波段（约50%）。此外，MuSaSHI的光学系统是为快速望远镜（F 6.5）而设计的，并考虑到便携性，因此它能够安装在具有较慢光束的较大孔径望远镜上。60秒积分（10σ）的极限幅值为rlim= 16。8，ilim= 17。zlim= 17。对于一颗K 0 V的星星WASP-84，我们证明了它在所有波段的相对光度精度< 0.1%。
We describe a development and performance evaluations for Multi-wavelength SimultaneouS High throughput Imager and polarimeter called as” MuSaSHI”. The science drivers are high-precision muticolor photometric studies of time-variable astronomical phenomena such as variable stars, transiting planets and asteroids. MuSaSHI is designed to be mounted on the SaCRA telescope at Saitama University, dedicated for relatively wide field imaging and polarimetry in the three optical bands (r: 550 to 680 nm, i: 700 to 810 nm, z: 820 to 1000 nm). The instrument is equipped with three Back-Illuminated thinned e2v CCDs which provide simultaneous r, i, z images having a field of view of 12.8× 12.4 arcmin with a pixel scale of 0.73 arcsec. The optical system of MuSaSHI is composed of only two dichroic mirrors and three bandpass filters without lens, so that the total throughput is high especially at z band (∼ 50%). In addition, the optics of MuSaSHI is designed for fast telescopes (F∼ 6.5) and with portability in mind so that it is able to be mounted on a larger aperture telescope with slower beam. The limiting magnitudes with 60 sec integration (10σ) are rlim= 16. 8, ilim= 17. 1, and zlim= 17. 2 mag. We demonstrate relative photometric precisions of< 0.1% in the all bands for a K0 V star WASP-84 which hosts a transiting planet with 30s exposure observations.