Search for a diffuse flux of photons with energies above tens of PeV at the Pierre Auger Observatory - Halim, Adila Binti Abdul; Catalani, Fernando; Souza, Vitor de; Oliveira, Cainã de; Santos, Edivaldo Moura; Peixoto, Carlos Jose Todero (Journal of Cosmology and Astroparticle Physics, 2025)