标题： 宇宙射线非破坏性读取斜坡的最佳检测 显示英文标题

标题： Optimal Cosmic-Ray Detection for Nondestructive Read Ramps

摘要： 宇宙射线是天文学中的一个已知问题，导致数据丢失和数据不准确。 当考虑来自高辐射环境的数据时，这个问题变得更加严重，例如在地球轨道上或完全不受地球磁场保护的区域，这将是詹姆斯·韦布空间望远镜（JWST）的情况。 对于JWST，所有仪器都采用非破坏性读出方案。 这些方案中最常见的是“斜坡上升”采样，其中在斜坡期间定期读取探测器。 我们研究了三种校正这些斜坡中宇宙射线的方法：两点差分法、拟合偏差法和y截距法。 我们将这些方法应用于具有单样本组的模拟非破坏性读出斜坡，并考虑通量、样本数量、宇宙射线数量、宇宙射线在曝光中的位置和宇宙射线强度的不同组合。 我们表明，在读出噪声占主导的范围内，y截距法是最优检测方法，而在光子噪声占主导的范围内，y截距法和两点差分法都是最佳选择，后者需要更少的计算。 显示英文摘要

摘要： Cosmic rays are a known problem in astronomy, causing both loss of data and data inaccuracy. The problem becomes even more extreme when considering data from a high-radiation environment, such as in orbit around Earth or outside the Earth's magnetic field altogether, unprotected, as will be the case for the James Webb Space Telescope (JWST). For JWST, all the instruments employ nondestructive readout schemes. The most common of these will be "up the ramp" sampling, where the detector is read out regularly during the ramp. We study three methods to correct for cosmic rays in these ramps: a two-point difference method, a deviation from the fit method, and a y-intercept method. We apply these methods to simulated nondestructive read ramps with single-sample groups and varying combinations of flux, number of samples, number of cosmic rays, cosmic-ray location in the exposure, and cosmic-ray strength. We show that the y-intercept method is the optimal detection method in the read-noise-dominated regime, while both the y-intercept method and the two-point difference method are best in the photon-noise-dominated regime, with the latter requiring fewer computations.