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Image Quality

After the remediation laboratory work carried out in April 2014, Flamingos-2 delivers an image quality that is back to its original specification. Excluding effect of seeing, we obtained fwhm ~ 0.35 arcsec for all the pinholes across the 6 arcmin FOV.

FLAMINGOS-2 measured full-width at half-maximum (FWHM), as a function of distance from center. The old measurements (blue) show worse performance at larger distance. After the recent work (orange), the performance is more uniform across the whole field of view. Horizontal lines mark the FWHM values in various observing bins (Image Quality 20 percentile = IQ20, etc.).

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