Tutorials#

Notice : it is advised to first read Gammapy analysis workflow and package structure of the User Guide before using the tutorials.

This page lists the Gammapy tutorials that are available as Jupyter notebooks. You can read them here, or execute them using a temporary cloud server in Binder.

To execute them locally, you have to first install Gammapy locally (see Installation) and download the tutorial notebooks and example datasets (see Getting started). Once Gammapy is installed, remember that you can always use gammapy info to check your setup.

Gammapy is a Python package built on Numpy and Astropy, so to use it effectively, you have to learn the basics. Many good free resources are available, e.g. A Whirlwind tour of Python, the Python data science handbook and the Astropy Hands-On Tutorial.

Introduction#

The following three tutorials show different ways of how to use Gammapy to perform a complete data analysis, from data selection to data reduction and finally modeling and fitting.

The first tutorial is an overview on how to perform a standard analysis workflow using the high level interface in a configuration-driven approach, whilst the second deals with the same use-case using the low level API and showing what is happening under-the-hood. The third tutorial shows a glimpse of how to handle different basic data structures like event lists, source catalogs, sky maps, spectral models and flux points tables.

Data structures

High level interface

Low level API

Data exploration#

These tutorials show how to perform data exploration with Gammapy, providing an introduction to the CTA, HAWC, H.E.S.S. and Fermi-LAT data and instrument response functions (IRFs). You will be able to explore and filter event lists according to different criteria, as well as to get a quick look of the multidimensional IRFs files.

H.E.S.S. with Gammapy

CTAO with Gammapy

Fermi-LAT with Gammapy

HAWC with Gammapy

Data analysis#

The following set of tutorials are devoted to data analysis, and grouped according to the specific covered use cases in spectral analysis and flux fitting, image and cube analysis modelling and fitting, as well as time-dependent analysis with light-curves.

Package / API#

The following tutorials demonstrate different dimensions of the Gammapy API or expose how to perform more specific use cases.

Using Gammapy IRFs

Models

Priors

Dark matter spatial and spectral models

Maps

Mask maps

Datasets - Reduced data, IRFs, models

Makers - Data reduction

Source catalogs

Observational clustering

Modelling

Fitting

Estimators

Scripts#

For interactive use, IPython and Jupyter are great, and most Gammapy examples use those. However, for long-running, non-interactive tasks like data reduction or survey maps, you might prefer a Python script.

The following example shows how to run Gammapy within a Python script.