OSIRIS: a new code for ray tracing around compact objects J. M. Velásquez-Cadavid, J. A. Arrieta-Villamizar, F. D. Lora-Clavijo, O. M. Pimentel and J. E. Osorio-Vargas Eur. Phys. J. C, 82 2 (2022) 103 Published online: 03 February 2022 DOI: 10.1140/epjc/s10052-022-10054-0