The central 7 × 7 arcsec region surrounding 1ES 0647+250. In the left-hand and middle panels, in grey-scale and contours, respectively, from top to bottom: a) the original image, b) the PSF model, c) the host galaxy (the PSF model subtracted from the observed profile), and d) the residuals of the fit. On the right-hand panels, the top panel shows the observed radial profile (open diamonds), superimposed on the PSF model (blue dotted line) and an elliptical galaxy model convolved with its PSF (green dashed line). The red solid line shows the composite fit. The second and third panels show the radial profiles of the PSF model (red solid line), and the host galaxy after the PSF subtraction, respectively, while the bottom two panels show the residuals and the χ2 distribution of the fit.
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