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Fig. 3.

image

Total, unpulsed, and pulsed spectra (left panel) and corresponding PF (right panel) of PSR J2021+4026 as observed by EPIC-pn and extracted with the 3D-ML, assuming a Gaussian function (Eq. (5)) for the pulse profile. The solid lines represent the PF computed in the case of a power law plus a blackbody (PL+BB, magenta line), and a power law plus a magnetized atmosphere (PL+ATMO, green line).

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