Development of a Raman Lidar for the Southern Site of the Cherenkov Telescope Array Observatory
Abstract
The future CTAO will reach a sensitivity and energy resolution never obtained until now by any other high-energy gamma-ray experiment. Studying the atmospheric conditions during the CTAO observations, namely the extinction and backscatter coefficients, permits a very precise evaluation of the atmospheric UV absorption, a parameter that directly affects the energy and flux spectra of the CTAO-studied sources. This paper describes the motivation for the LUPM Raman Lidar system, a Lidar specifically designed to fulfill the CTAO requirements for the south site in Chile. Preliminary results obtained during a two-year campaign at the OHP Observatory are presented. Our results include estimations of the extinction, back-scatter, and Lidar ratio at both 355 and 532 nm and confirm the conformity of our prototype to the CTAO requirements
Cite
@article{arxiv.2607.08289,
title = {Development of a Raman Lidar for the Southern Site of the Cherenkov Telescope Array Observatory},
author = {Patrick Brun and Omar Gabella and Stephane Rivoire and George Vasileiadis},
journal= {arXiv preprint arXiv:2607.08289},
year = {2026}
}