.. _gammapy_0p4_release:

0.4 (Apr 20, 2016)
------------------

Summary
~~~~~~~

- Released Apr 20, 2016
- 10 contributors (5 new)
- 8 months of work
- 108 pull requests (not all listed below)
- Requires Python 2.7 or 3.4+, Numpy 1.8+, Scipy 0.15+, Astropy 1.0+, Sherpa 4.8+

What's new?
~~~~~~~~~~~

- Women are hacking on Gammapy!
- IACT data access via DataStore and HDU index tables
- Radially-symmetric background modeling
- Improved 2-dim image analysis
- 1-dim spectral analysis
- Add sub-package ``gammapy.cube`` and start working on 3-dim cube analysis
- Continuous integration testing for Windows on Appveyor added
  (Windows support for Gammapy is preliminary and incomplete)

Contributors
~~~~~~~~~~~~

- Axel Donath
- Brigitta Sipocz (new)
- Christoph Deil
- Dirk Lennarz (new)
- Johannes King
- Jonathan Harris
- Léa Jouvin (new)
- Luigi Tibaldo (new)
- Manuel Paz Arribas
- Olga Vorokh (new)

Pull requests
~~~~~~~~~~~~~

This list is incomplete. Small improvements and bug fixes are not listed here.

See the complete `Gammapy 0.4 merged pull requests list on GitHub <https://github.com/gammapy/gammapy/pulls?utf8=%E2%9C%93&q=is%3Apr+milestone%3A0.4+is%3Amerged+>`__.

- [#518] Fixes and cleanup for SkyMap (Axel Donath)
- [#511] Add exposure image computation (Léa Jouvin)
- [#510] Add acceptance curve smoothing method (Léa Jouvin)
- [#507] Add Fermi catalog spectrum evaluation and plotting (Johannes King)
- [#506] Improve TS map computation performance (Axel Donath)
- [#503] Add FOV background image modeling (Léa Jouvin)
- [#502] Add DataStore subset method (Johannes King)
- [#487] Add SkyMap class (Axel Donath)
- [#485] Add OffDataBackgroundMaker (Léa Jouvin)
- [#484] Add Sherpa cube analysis prototype (Axel Donath)
- [#481] Add new gammapy.cube sub-package (Axel Donath)
- [#478] Add observation stacking method for spectra (Léa Jouvin and Johannes King)
- [#475] Add tests for TS map image computation (Olga Vorokh)
- [#474] Improve significance image analysis (Axel Donath)
- [#473] Improve tests for HESS data (Johannes King)
- [#462] Misc cleanup (Christoph Deil)
- [#461] Pacman (Léa Jouvin)
- [#459] Add radially symmetric FOV background model (Léa Jouvin)
- [#457] Improve data and observation handling (Christoph Deil)
- [#456] Fix and improvements to TS map tool (Olga Vorokh)
- [#455] Improve IRF interpolation and extrapolation (Christoph Deil)
- [#447] Add King profile PSF class (Christoph Deil)
- [#436] Restructure spectrum package and command line tool (Johannes King)
- [#435] Add info about Gammapy contact points and gammapy-extra (Christoph Deil)
- [#421] Add spectrum fit serialisation code (Johannes King)
- [#403] Improve spectrum analysis (Johannes King)
- [#415] Add EventList plots (Jonathan Harris)
- [#414] Add Windows tests on Appveyor (Christoph Deil)
- [#398] Add function to compute exposure cubes (Luigi Tibaldo)
- [#396] Rewrite spectrum analysis (Johannes King)
- [#395] Fix misc issues with IRF classes (Johannes King)
- [#394] Move some data specs to gamma-astro-data-formats (Christoph Deil)
- [#392] Use external ci-helpers (Brigitta Sipocz)
- [#387] Improve Gammapy catalog query and browser (Christoph Deil)
- [#383] Add EnergyOffsetArray (Léa Jouvin)
- [#379] Add gammapy.region and reflected region computation (Johannes King)
- [#375] Misc cleanup of scripts and docs (Christoph Deil)
- [#371] Improve catalog utils (Christoph Deil)
- [#369] Improve the data management toolbox (Christoph Deil)
- [#367] Add Feldman Cousins algorithm (Dirk Lennarz)
- [#364] Improve catalog classes and gammapy-extra data handling (Jonathan Harris, Christoph Deil)
- [#361] Add gammapy-spectrum-pipe (Johannes King)
- [#359] Add 1D spectrum analysis tool based on gammapy.hspec (Johannes King)
- [#353] Add some scripts and examples (Christoph Deil)
- [#352] Add data management tools (Christoph Deil)
- [#351] Rewrite EnergyDispersion class (Johannes King)
- [#348] Misc code cleanup (Christoph Deil)
- [#347] Add background cube model comparison plot script (Manuel Paz Arribas)
- [#342] Add gammapy-bin-image test (Christoph Deil)
- [#339] Remove PoissonLikelihoodFitter (Christoph Deil)
- [#338] Add example script for cube background models (Manuel Paz Arribas)
- [#337] Fix sherpa morphology fitting script (Axel Donath)
- [#335] Improve background model simulation (Manuel Paz Arribas)
- [#332] Fix TS map boundary handling (Axel Donath)
- [#330] Add EnergyDispersion and CountsSpectrum (Johannes King)
- [#319] Make background cube models (Manuel Paz Arribas)
- [#290] Improve energy handling (Johannes King)