宽视场亚毫米成像的新时代：SCUBA-2的天空性能
A new era of wide-field submillimetre imaging: on-sky performance of SCUBA-2
摘要：
SCUBA-2是有史以来建造的最大的亚毫米宽视场测热相机。这个43平方角分的视场仪器在两个波长（850和450微米）下工作，并已安装在夏威夷莫纳克亚山的詹姆斯·克拉克·麦克斯韦望远镜上。自2011年10月以来，SCUBA-2号已成功投入使用，并用于普通科学。本文概述了该仪器在2011年年中调试期间和调试以来的天空性能。将显示450和850微米阵列的天空噪声特性和NEP，每个波长的平均产量约为3400个测辐射热计。介绍了该仪器的观测方式和天定标技术。这些努力的结果是产生了一种科学上强大的测绘相机，其灵敏度允许在最好的天气下在2小时内将一平方度的天空映射到850微米处的10 mJy/光束rms，在5小时内映射到450微米处的60 mJy/光束rms。
英文摘要：
SCUBA-2 is the largest submillimetre wide-field bolometric camera ever built. This 43 square arc-minute field-of-view instrument operates at two wavelengths (850 and 450 microns) and has been installed on the James Clerk Maxwell Telescope on Mauna Kea, Hawaii. SCUBA-2 has been successfully commissioned and operational for general science since October 2011. This paper presents an overview of the on-sky performance of the instrument during and since commissioning in mid-2011. The on-sky noise characteristics and NEPs of the 450 and 850 micron arrays, with average yields of approximately 3400 bolometers at each wavelength, will be shown. The observing modes of the instrument and the on-sky calibration techniques are described. The culmination of these efforts has resulted in a scientifically powerful mapping camera with sensitivities that allow a square degree of sky to be mapped to 10 mJy/beam rms at 850 micron in 2 hours and 60 mJy/beam rms at 450 micron in 5 hours in the best weather.
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