标题： 基于校准硅光二极管和可调谐激光器的PanSTARRS望远镜和千兆像素成像仪的精确吞吐量测定：初步结果 显示英文标题

标题： Precise Throughput Determination of the PanSTARRS Telescope and the Gigapixel Imager using a Calibrated Silicon Photodiode and a Tunable Laser: Initial Results

摘要： 我们使用了一个精度校准的光电二极管作为基本计量参考，以确定PanSTARRS望远镜和千兆像素成像器在400纳米到1050纳米范围内的相对通光率。 我们的技术使用可调谐激光器作为透射平场屏幕的照明源。 通过将CCD阵列中每个像素看到的光与一个精度校准的硅光电二极管测量的光进行比较，我们可以确定全孔径系统通光率随波长的变化情况，包括（在一次积分测量中）镜面反射率、滤光片和校正光学元件的传输函数以及探测器的量子效率。 这种方法使我们能够在不观测天体标准的情况下，确定仪器中每个像素的整个系统的相对通光率随波长的变化情况。 我们展示了对PanSTARRS系统的这种表征的有希望的初步结果，并使用合成测光法评估视场内通光率变化引起的测光扰动。 显示英文摘要

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.