Development of an optical and near-infrared telescope onboard the HiZ-GUNDAM mission
Development of an optical and near-infrared telescope onboard the HiZ-GUNDAM mission
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为 HiZ-GUNDAM 任务开发光学和近红外望远镜
DOI：
10.1117/12.2560654
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Hirofumi Okita Hirofumi
中科院分区：
文献类型：
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作者：
Tsumura Kohji;Yonetoku Daisuke;Kawabata Koji;Matsuura Shuji;Noda Hirofumi;Urata Yuji;Niino Yuu;Sano Kei;Ohashi Akisato;Doi Akihiro;Akitaya Hiroshi;Miyasaka Akihiro;Kurimata Miku;Kawata Yoshikatsu;Arimoto Makoto;Hirofumi Okita Hirofumi
HIZ-Gundam(用于解开黑暗时代任务的高z伽马射线暴)是一项通过监测高能天文瞬变事件(如伽马射线暴)的时间域和多信使天文学任务。HIZ-Gundam的设计目的是为高红移伽玛暴提供警报，配备一个超广域X射线监视器和一个联合机载30厘米望远镜，用于在可见光和近红外区域立即进行光度跟踪观测。HIZ-Gundam卫星自动改变对发现的瞬变物体的姿态，开始用望远镜进行后续观测，并在一小时内发送包括瞬变物体的详细位置、视星等和光度红移在内的警报信息。这一飞行任务被选为2020年代中期国际空间站/日本宇宙航空研究开发机构竞争选定的中级飞行任务的任务概念候选者之一。目前正在进行望远镜面板模型的基本设计，并对其验证方案进行了研究。光学元件通过辐射冷却冷却到200K，红外探测器还通过机械冷却器冷却到120K。望远镜中的所有反射镜都是由相同的铝合金制成的，以减少冷却过程中的对准误差。四波段同时观测由三个分束器实现。在这台望远镜上安装了HgCdTe和HyViSi探测器。我们的其他任务展示了这些规格的基本技术。此外，还研究了高红移伽玛暴与轨道附近尘埃星系区分的星载探测算法。本文介绍了HIZ-Gundam星载望远镜的发展现状。
The HiZ-GUNDAM (high-z Gamma-ray bursts for UNraveling the Dark Ages Mission) is a time-domain and multi-messenger astronomy mission by monitoring high-energy astronomical transient events such as gamma-ray bursts (GRBs). The HiZ-GUNDAM is designed to provide alerts of high-redshift GRBs with an ultra-wide field X-ray monitor and a co-onboard 30-cm telescope for immediate photometric follow-up observations in the visible and near-infrared. The HiZ-GUNDAM satellite automatically changes its attitude toward the discovered transient object, starts the follow-up observations with the telescope, and sends alert information including the detailed position, the apparent magnitude and photometric redshift of the transient object within one hour. This mission was selected as one of the mission concept candidates of the competitively-chosen medium-class mission of ISAS/JAXA in the mid-2020s. The basic design of the breadboard model of the telescope is undergoing, and the verification plan of it is studied. The optics are cooled down to 200 K by radiation cooling, and infrared detectors are additionally cooled down to 120 K by a mechanical cooler. All mirrors in the telescope are made of the same aluminum-alloy to reduce the alignment errors during cooling. The four-band simultaneous observation is realized by three beam splitters. The HgCdTe and HyViSi detectors are installed in this telescope. Basic technologies for these specifications are demonstrated by our other missions. In addition, the onboard detection algorithm of high-redshift GRBs by distinguishing them from nearby dusty galaxies in the orbit is also studied. In this paper, we introduce the current status of the development of the telescope onboard HiZ-GUNDAM.