Detection of the distant quasar OP 313 with the first Large-Sized Telescope of CTAO

K. Abe, S. Abe, J. Abhir +412

In December 2023, the Large-Sized Telescope prototype (LST-1) detected for the first time VHE ${\hat{I}}^3$-ray emission from the FSRQ OP~313 becoming the furthest blazar ever observed at V…