使用校准硅光电二极管和可调谐Laser精确确定PanSTARRS望远镜和千兆像素成像仪的发射量：初步结果
Precise Throughput Determination of the PanSTARRS Telescope and the Gigapixel Imager using a Calibrated Silicon Photodiode and a Tunable Laser: Initial Results
摘要：
我们使用了一个精密校准的光电二极管作为基本的计量参考，以确定PanSTARRS望远镜和千兆像素成像仪的相对吞吐量，从400 nm到1050 nm。我们的技术使用可调谐激光器作为透射平场屏幕上的照明源。我们确定的全孔径系统的吞吐量作为波长的函数，包括（在一个单一的积分测量）的反射镜反射率，滤波器和校正器的光学传输功能，和检测器的量子效率，通过比较在CCD阵列中的每个像素所看到的光的精确校准的硅光电二极管测量。这种方法使我们能够确定整个系统的相对吞吐量作为波长的函数，对于仪器中的每个像素，而无需观测天体标准。我们提出了有前途的初步结果，从这个PanSTARRS系统的特性，我们使用合成光度法来评估由于整个视野的吞吐量变化的光度扰动。
英文摘要：
We have used a precision calibrated photodiode as the fundamental metrology reference in order to determine the relative throughput of the PanSTARRS telescope and the Gigapixel imager, from 400 nm to 1050 nm. Our technique uses a tunable laser as a source of illumination on a transmissive flat-field screen. We determine the full-aperture system throughput as a function of wavelength, including (in a single integral measurement) the mirror reflectivity, the transmission functions of the filters and the corrector optics, and the detector quantum efficiency, by comparing the light seen by each pixel in the CCD array to that measured by a precision-calibrated silicon photodiode. This method allows us to determine the relative throughput of the entire system as a function of wavelength, for each pixel in the instrument, without observations of celestial standards. We present promising initial results from this characterization of the PanSTARRS system, and we use synthetic photometry to assess the photometric perturbations due to throughput variation across the field of view.
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