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Finite-detector effects in speckle imaging

机译:散斑成像中的有限检测器效应

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Abstract: When astronomical speckle images are truncated by the finite size of the image detector, important errors occur in the estimated power spectrum and the Knox- Thompson cross-spectra. The errors and their effect on image reconstruction are calculated for an 8-component and a 3-component star model. The distortions and negative artifacts seen in the reconstructions of the star ADS 11344 are explained by image truncation. A method of estimating an approximate error bound given the telescope, atmospheric seeing, detector size, and sampling rate is outlined.!7
机译:摘要:当天文斑点图像被图像检测器的有限大小截断时,估计的功率谱和诺克斯-汤普森交叉谱中会发生重要误差。对于8分量和3分量星形模型,计算了误差及其对图像重建的影响。星空ADS 11344的重建过程中看到的失真和负伪影由图像截断说明。概述了一种在给定望远镜,大气观测,探测器大小和采样率的情况下估计近似误差范围的方法!7

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