Sensitivity as a function of position on the disk for the 6173 Å line for the G2 star with 0 G and i = 90°. The rotation rates for panels a through d are 0 km s−1, 2 km s−1, 4 km s−1, and 6 km s−1. The maps are normalized to have the same integrated sensitivity for the four cases. Grayscale goes from −0.15 times the maximum sensitivity to the maximum.
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