论文标题
光度校正后光子计数的信噪比
The Signal-to-Noise Ratio for Photon Counting After Photometric Corrections
论文作者
论文摘要
光子计数是一种处理使用电子式电荷耦合器件（EMCCD）观察到的低信号目标天文观察的一种模式。在光子计数中，EMCCD放大了信号，阈值技术有效地选择了信号电子，同时大大降低了相对噪声源。已经开发了光度校正，从而导致对电子信号进行更准确的估计，而Nancy Grace Roman Roman望远镜将使用基于良好校准的噪声参数的校正来利用信噪比（SNR）的理论表达式（SNR），以通过其冠状仪器进行观察。我在这里得出了SNR的分析表达式，用于应用光子计数方法，在应用这些光度校正之前和之后。
Photon counting is a mode of processing astronomical observations of low-signal targets that have been observed using an electron-multiplying charge-coupled device (EMCCD). In photon counting, the EMCCD amplifies the signal, and a thresholding technique effectively selects for the signal electrons while drastically reducing relative noise sources. Photometric corrections have been developed which result in the extraction of a more accurate estimate of the signal of electrons, and the Nancy Grace Roman Telescope will utilize a theoretical expression for the signal-to-noise ratio (SNR) given these corrections based on well-calibrated noise parameters to plan observations taken by its coronagraph instrument. I derive here analytic expressions for the SNR for the method of photon counting, before and after these photometric corrections have been applied.
