Lecture 1: Introduction to Gammapy (Bruno Khelifi)

• Bruno Khélifi (APC, CNRS/Université de Paris Cité)

During this presentation, Gammapy will be introduced. This open Python research software aims to analyse high-level data (under the GADF or OGIP formats) from gamma-ray instruments, like H.E.S.S/MAGIC/VERITAS/CTA (using the Imaging Atmospheric Cherenkov Technique) or HAWC/SWGO (using the Water Cherenkov Technique), as well Fermi-LAT. This software permits the production of the common very-high-energy astrophysical products (like flux maps, spectral energy distribution, time domain analysis). This talk will describe the library based on its version v1.2 (2024), its main features and data flow, the organisation of the Gammapy project. Material: https://github.com/bkhelifi/Brazil_2024

Lecture 2: First hands-on session on Gammapy (Bruno Khelifi)

• Bruno Khélifi (APC, CNRS/Université de Paris Cité)

This first session aims to learn on your own laptop the basic uses of Gammapy, by using Jupyter Notebooks. We will work on the extraction of a spectrum from a point source, and on the realisation of a 3D analysis of an extended source. Please install Gammpy for this session on your computer Material: https://github.com/bkhelifi/Brazil_2024

Lecture 3: Humberto Martinez Huerta

• Humberto Martínez-Huerta (Departamento de Física y Matemáticas, UDEM)

1. Introduction to Lorentz Symmetry and Violation 1.1 Lorentz Symmetry Recap 1.2 Motivation for Lorentz Symmetry Violation Recommended Material: [1] https://doi.org/10.48550/arXiv.1906.06293 [2] https://doi.org/10.1016/j.ppnp.2022.103948

Lecture 4: Iarley Pereira Lobo

• Iarley Lobo (Federal University of Paraíba)

We will address the problem of introducing an energy scale which governs deviations from the relativistic description of spacetime (supposedly the Planck scale), motivated by theories that quantize gravity. The main models that describe these deviations, which break or deform the Lorentz symmetry (called LIV models and DSR models) will be presented. Refs. for both lectures: [1] https://doi.org/10.12942/lrr-2013-5 [2] https://doi.org/10.1016/j.ppnp.2022.103948 [3] https://doi.org/10.48550/arXiv.2312.00409

Lecture 5: Second hands-on session on Gammapy (Bruno Khelifi)

• Bruno Khélifi (APC, CNRS/Université de Paris Cité)

This lecture will focus on the simulations of data, which then permits to asset the performances of an instrument to a given source or to realise studies on reconstruction quality (assessment of systematics errors). We will primary experience the simulations of reduced binned dataset of a steady source, then we will use this technique to estimate the detectability of a source. Material: https://github.com/bkhelifi/Brazil_2024

Lecture 6: Third hands-on session on Gammapy (Bruno Khelifi)

• Bruno Khélifi (APC, CNRS/Université de Paris Cité)

The last session will aim to quantify systematic errors using simulations. We will derive the errors on spectral parameters caused by a possible absolute energy scale bias or a possible background rate bias. Material: https://github.com/bkhelifi/Brazil_2024

Lecture 7: Humberto Martinez Huerta

• Humberto Martínez-Huerta (Departamento de Física y Matemáticas, UDEM)

Module 3: Phenomenological Implications and Experimental Constraints -Discussion on observable effects of 2->2 LIV thresholds -Experimental/Sensitivity Tests -Hands-on block (please bring your computer) -Material (Example_0.ipynb, Example_attenuation.ipynb): https://drive.google.com/drive/folders/16-DqOq9grmjjQKhtB2arTSrjWADI1OcB?usp=sharing Recommended material: [1] https://arxiv.org/pdf/1901.03205.pdf [2] https://doi.org/10.1088/1475-7516/2021/02/048 [3] https://github.com/me-manu/ebltable

Lecture 8: Iarley Pereira Lobo

• Iarley Lobo (Federal University of Paraíba)

We will discuss the main observables (focusing on astrophysical ones) that can lead to the detection of signatures of a quantum space-time and the distinction between the LIV and DSR models.

Lecture 9: Humberto Martinez Huerta

• Humberto Martínez-Huerta (Departamento de Física y Matemáticas, UDEM)

3 Frameworks for Lorentz Symmetry Violation and astrophysical search methods and exclusion limits. Recommended material: [1] https://doi.org/10.1103/PhysRevD.95.063001 [2] https://doi.org/10.1103/PhysRevD.58.116002