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Fig. 3

image

PSFs in different filters for the red giant in R Aqr and the star HD 183143. The PSFs are normalized for R Aqr to a total count level of 106 within an aperture of 3 arcsec diameter (lower curves) and for HD 183143 to 107 (upper curves). PSF for different filters are given by different colors as indicated. The dashed red curves for R Aqr show the “best” (max) and “worst” (min) PSF for the CntHa-filter observations.

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