Added an explanation in the docs
@@ -90,6 +90,7 @@ class SkyGaussian(SkySpatialModel):
N = \frac{1}{4\pi a\left[1-\text{exp}(-1/a)\right]}\,,\,\,\,\,
a = 1-\text{cos}\sigma\,.
+ The normalization factor is in units of :math:`\text{deg}^{-2}`.
In the limit of small :math:`\theta` and :math:`\sigma`, this definition reduces to the usual form:
.. math::
