Confidence interval in the diffusion normalization and injection index space, for model fits to HAWC+LAT data in the case of J0633+1746 (top panel), and to HAWC data only in the case of B0656+14 (bottom panel). The model setups feature a suppressed diffusion region extent of 50 pc. The color-coding indicates increasing χ² variations from the optimum of up to 1 and 4 in the orange and yellow regions, respectively. The black vertical hatches indicate the model fits yielding positron fluxes in excess of the AMS-02 measurement in the 0.1−1 TeV range, while the gray slanting hatches indicate model fits implying injection efficiencies in excess of 100% of the spin-down power.