Image Details
Caption: Figure 7.
Panels (a) and (b) show the spectral image of the absorption line at 5302.3 Å in slit 1 (between pixels 50 and 100 in the x-axis), and the position of the absorption-line minimum as a function of spatial location, respectively, before spectral curvature correction. The corresponding images after correction are shown in panels (c) and (d), respectively.
© 2026. The Author(s). Published by the American Astronomical Society.