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The combined effect of a strong gravitational field and electromagnetic fieldin the vicinity of a generic regular black hole related to non-linearelectrodynamics with Maxwellian weak-field limit on the radiation flux of a hotspot orbiting the regular black hole on the Keplerian disc has been studied.The frequency shift due to the strong gravitational field and magnification ofthe radiation related to gravitational lensing have been calculated. We comparethe flux related to the Maxwellian regular black hole to the flux of the hotspots moving with the same orbital period around standard Schwarzschild andRaissner-Nordstrom black holes to illustrate the role of the effective geometrygoverning photon motion around the regular black hole.

Light curves of the hot spots on circular orbits around generic regular  black holes related to non-linear electrodynamics with Maxwellian weak-field  Limit