Fig. 1
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Topological layout of the MIRI MRS optics. Blue, green, orange, and red identify the instrument’s four spectral channels, 1 to 4, respectively. “DGA” refers to the two dichroic-grating wheel assemblies, “ΓFU” to the integral field units, and “FPA” to the focal plane assemblies (the two detectors). The figure is adopted from Wright et al. (2023).
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