Calibration and Performance of the Photon-counting Detectors for the Ultraviolet Imaging Telescope (UVIT) of the Astrosat Observatory
Calibration and Performance of the Photon-counting Detectors for the Ultraviolet Imaging Telescope (UVIT) of the Astrosat Observatory
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Astrosat 天文台紫外成像望远镜 (UVIT) 光子计数探测器的校准和性能
DOI：
10.1086/661187
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
D. Leahy
中科院分区：
文献类型：
--
作者：
J. Postma;J. B. Hutchings;D. Leahy
我们描述的校准数据和讨论的天文卫星天文台的紫外成像望远镜的光子计数飞行探测器的性能。本文介绍了暗电流，平场，光斑图像FUV，NUV和可见光波段探测器在一个以上的波长设置为每个。我们还报告标称增益和低增益操作，全窗口和子窗口读取速率，以及非光子计数操作模式，所有这些都有望在飞行中使用。我们从CMOS读出阵列中推导出不同质心算法的事件质心校正。我们推导出每个探测器的空间分辨率值和不同通量水平的点源信号饱和度图。我们还讨论了在扩展对象图像中校正饱和度的方法。
We describe calibration data and discuss performance of the photon-counting flight detectors for the Ultraviolet Imaging Telescopes on the Astrosat observatory. This article describes dark current, flat-field, and light-spot images for FUV, NUV, and visible band detectors at more than one wavelength setting for each. We also report on nominal-gain and low-gain operations, full- and subwindow read rates, and non-photon-counting modes of operation, all expected to be used in flight. We derive corrections to the event centroids from the CMOS readout arrays, for different centroid algorithms. We derive spatial resolution values for each detector and plots of point-source signal saturation for different flux levels. We also discuss ways to correct for saturation in extended object images.