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Fig. 7


Restored spectra of 23 s of data obtained without moving the 0.11′′ wide slit. Horizontal and vertical axes are in arcseconds. Although the AO and CT were both in closed loop operation, the variation of the PSF in the 23 s covered by the data was sufficient to recover the spectra over a 1′′ wide strip. The highest S/N of about 500 was found to be concentrated in the central 4 pixel rows, whereas the S/N in the outer few pixel rows is approaching unity, which is clearly visible in the image.

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