Computation of J factor for Indirect Dark Matter Searches - adam-coogan/GRAPPA_Student_Seminar_2019 GitHub Wiki
Coordinates Transformation
To avoid confusion, we use the subscripts (…)⊕ and (…)G in the following to denote the coordinate frames attached to the Earth (or the Sun if you wish) and to the Galactic centre (GC), respectively. Generally, distances are given in kpc and angles in rad (except for Euler rotations, for which angles are given in degrees).