Stefan Fröse

test for now, will add description later

**Is your feature request related to a problem? Please describe.** 1. The `darkmatter` subpackage contains spectral models like `DarkMatterAnnihilationSpectralModel` (or in the near future for decay see #4740 ) as...

[PIG] Systematics Modifier API

6

This pull request proposes the handling of systematic effects on the IRFs.

Asimov TS to Sigma conversion wrong

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I took a look at this function and I think it is not correct. https://github.com/gammapy/gammapy/blob/d007b00e11a5317a50d15188ac624c02965d2df2/gammapy/stats/utils.py#L88-L89 The Asimov paper says for $q_0$ case: > That is, one finds a mixture of...