Fig. A.2.
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PRISM bar shadow for three-shutter slitlets. The left panels show the sky-normalised average spectra for 168 empty background slitlets extracted from program GO-275O. The vertical axis is the rectified “shutter” coordinate frame. The right panels show the 2D spectrum of a single exposure and slitlet in the original detector coordinate frame. The top panels show the spectra without any bar shadow correction. The centre panels show the correction using the CRDS reference files, and the bottom panels show the wavelength-dependent correction using msaexp.
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