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Fig. 10


Spectral fidelity of an arc-line in the H-band as a function of spatial position across all 24 IFUs, when using the Modified Shepard’s method for the interpolation. The offset of the line from its nominal position (blue), and its FWHM (red), are shown. Top: for a cube reconstructed from a single exposure. Bottom: using the multi-reconstruct scheme described in Sect. 4.2 to generate a single cube from 6 input frames at different rotator angles. The improvement can be quantified in terms of the rms error in the line position, which is 6.6 km s-1 for the single frame, and 2.7 km s-1 when using 6 frames simultaneously.

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