KWFC: four square degrees camera for the Kiso Schmidt Telescope
KWFC: four square degrees camera for the Kiso Schmidt Telescope
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KWFC：木曾施密特望远镜的四平方度相机
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
M. Richmond
中科院分区：
文献类型：
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作者：
S. Sako;T. Aoki;M. Doi;N. Ienaka;N. Kobayashi;N. Matsunaga;H. Mito;T. Miyata;T. Morokuma;Y. Nakada;T. Soyano;K. Tarusawa;S. Miyazaki;F. Nakata;N. Okada;Y. Sarugaku;M. Richmond
KISO广场相机(KWFC)是东京大学KISO天文台正在运行的105厘米施密特望远镜的一种设施仪器。这架相机是利用施密特望远镜的大焦面面积设计用于广域观测的。8块共8k x 8k像素的ccd芯片在空中覆盖了2.2度x 2.2度的视场。杜瓦窗口的作用就像一个场展平透镜，将视场中的图像失真降到最低。两个平行移动的快门板实现了对所有CCD像素的均匀曝光。KWFC配备了一个由工业机械臂组成的过滤器交换器，一个可以存储12个过滤器的过滤器仓，以及一个位于焦平面的过滤器支架。臂和料盒都安装在望远镜的管架内，但不会遮挡光束。寻找超新星和晚型变星的广域探测计划已于2012年4月开始。测量观测是通过包括望远镜和KWFC在内的设施仪器管理软件系统进行的。该系统根据预先登记的目标名单自动进行观测，并通过参考天气条件和仪器状况作出适当的决定以实施观测。在调查中获得的图像数据被流水线软件实时处理，以搜索时变源的候选。
The Kiso Wide Field Camera (KWFC) is a facility instrument for the 105-cm Schmidt telescope being operated by the Kiso Observatory of the University of Tokyo. This camera has been designed for wide-field observations by taking advantage of a large focal-plane area of the Schmidt telescope. Eight CCD chips with a total of 8k x 8k pixels cover a field-of-view of 2.2 degrees x 2.2 degrees on the sky. The dewar window works as a field flattener lens minimizing an image distortion across the field of view. Two shutter plates moving in parallel achieve uniform exposures on all the CCD pixels. The KWFC is equipped with a filter exchanger composed of an industrial robotic arm, a filter magazine capable of storing 12 filters, and a filter holder at the focal plane. Both the arm and the magazine are installed inside the tube framework of the telescope but without vignetting the beam. Wide-field survey programs searching for supernovae and late-type variable stars have begun in April 2012. The survey observations are performed with a management software system for facility instruments including the telescope and the KWFC. This system automatically carries out observations based on target lists registered in advance and makes appropriate decisions for implementation of observations by referring to weather conditions and status of the instruments. Image data obtained in the surveys are processed with pipeline software in real time to search for candidates of time-variable sources.