Define applications

[nmik]

Define the applications needed following the different steps of the study:

1. gamma-ray data selection
2. gamma-ray maps production (counts maps, intensity maps, foreground subtraction,...)
3. matter tracer maps extraction
4. auto- and cross-correlation computation
5. auto and cross-correlation analysis
6. models construction
7. fitting and bounds

[nmik]

Completed application for gamma-ray data selection.

[nmik]

Completed applications for masks, flux maps (point 2.)