Fig. 6.
PSF model validation on Mrk421 data taken at zenith angles <30° in two energy ranges: 80 GeV–320 GeV (top panels) and 320 GeV–1280 GeV (bottom panels). Left panels: source images with the 68% and 95% level contours of the corresponding PSF model; centre panels: PSF model with the 68% and 95% containment contours of the sky map. Right panels: residuals after subtracting the normalized PSF model from the sky image.
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