We reccomend that you install gammapy via conda

• $ curl -O https://gammapy.org/download/install/gammapy-0.19-environment.yml
• $ conda env create -f gammapy-0.19-environment.yml
• $ conda activate gammapy-0.19

To download the tutorials and associated datasets (necessary for the tutorials in this workshop)

• $ gammapy download notebooks --release 0.19
• $ gammapy download datasets
• export GAMMAPY_DATA=$PWD/gammapy-datasets

To check if everything is working fine, open a new terminal and type

• $ conda activate gammapy-0.19
• $ ipython

In the ipython window, type

• from gammapy.data import DataStore
• ds = DataStore.from_dir("$GAMMAPY_DATA/hess-dl3-dr1")
• obs = ds.get_observations()
• print(len(obs))

If the cells run without any error and prints 105, Congratulations! You have correctly set-up gammapy

• loading observations and IRFs
• Data reduction and fitting of MSH 15-52 (a full analysis)
• Simulation of PKS 2155-304 with CTA IRFs
• Fitting of simulated PKS 2155-304: detection significance, detection of cutoff
• Fitting of simulated PKS 2155-304: joint Fermi-LAT and CTA fitting
• Light curves.