Gammapy is an open-source Python package for gamma-ray astronomy built on Numpy, Scipy and Astropy.
It is used as core library for the Science Analysis tools of the Cherenkov Telescope Array (CTA), recommended by the H.E.S.S. collaboration to be used for Science publications, and is already widely used in the analysis of existing gamma-ray instruments, such as MAGIC, VERITAS and HAWC.

News: Jun. 13th 2023: Minor version release v1.1
Nov. 10th, 2022: The LTS v1.0 has been released
In 2022, Gammapy received the jury prize of the Open Science awards for open source research software (see link)

Please remember to acknowledge and cite the use of Gammapy!