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In this paper, we study the motion of photons around a Kehagias–Sfetsos (KS) black hole and obtain constraints on IR modified Hořava gravity without cosmological constant (~ΛW). An analytic formula for the light deflection angle is obtained. For a propagating photon, the deflection angle δφ increases with large values of the Hořava gravity parameter ω. Under the UV limit $${\omega \longrightarrow...
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