Abstract

The five-day workshop is held in Paris and Meudon and includes both theoretical lectures and hands-on exercises (with parallel sessions for beginners and advanced users). This workshop is intended for researchers, doctoral students, and early-career postdocs alike, and in 2025 we also saw experienced researchers participating to learn how to analyze gamma-ray astronomy data.

Scientific justification

Construction of the CTAO Observatory is progressing rapidly, and the Gammapy software suite has been selected as CTAO’s Science Analysis Tools. The overview of current and/or upcoming space missions (e.g., Fermi and SVOM) is complemented by a series of ground-based instruments and projects (e.g., LHAASO, SWGO) in which the French community is participating.

The purpose of this international school is to teach the analysis of astrophysical data from high-energy gamma-ray instruments (CTAO, HESS/VERITAS/MAGIC, HAWC/SWGO). This is the third edition of the school; the first two took place October 14–18, 2024 (https://indico.obspm.fr/event/2480/), with 28 participants, and November 2–6, 2025 (https://indico.obspm.fr/event/2672/), with 32 participants.

It will cover two main topics: introductions to high-energy physics phenomena, instrumental and statistical techniques, followed by hands-on sessions on using Gammapy, an open-source, high-level data analysis library. The purpose of these workshops is to help the community become familiar with data analysis tools and their specific features, as well as to prepare them to submit requests for observation time on CTAO. A session introducing the observatories that will support CTAO is planned.
This school is intended for the next generation of young researchers and for experienced users (students, postdocs, or experienced researchers).

Preliminary program

Invited Lecturers :

Jonathan Biteau (IJCLab/CNRS/Paris Saclay)
Federica Bradascio (IJCLab/CNRS/Paris Saclay)
Matteo Cerruti (APC/CNRS/Univ. Paris Cité)
Stefano Gabici (APC/CNRS)

Invited Gammapy experts :

Tomas Bylund (LUX/APC/OBSPM)
Kirsty Feijen (APC/CNRS)
Maxime Regeard (APC/CNRS)
Quentin Remy (MPIK)