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Fig. 8


Combined residuals of the backward transform from FPA to MSA for G140M, G235M, G395M, G395H, and the MIRROR. Top panel: distribution in the MSA plane. The residuals of shutters used in the spectral modes (groups of the dashed slits) vary more strongly than those of the shutters from imaging mode (points spread in the quadrants). The physical direction of the axes are inverted to match the images of the detectors, since the reference frames are not following the optical projection. Bottom panel: histogram of residuals in x and y direction (left, middle) and absolute residuals (right). Shown in red are the confidence limits of 68.27% around the median at −1.84 and 1.98μm (x), and at −1.07 and 1.12μm (y), and the limit of 68.27% of absolute residuals at 2.44μm.

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