document rg2 and rg3

docs/models.rst

@@ -130,3 +130,5 @@ Radio galaxies
 ==============
 
 - **rg1**: Emission from Radio Galaxies simulated with WebSky 0.4. Available at $N_{side}=4096$ at the same input frequencies of CIB and then interpolated. For more details see :ref:`websky`.
+- **rg2**: Brightest Radio Galaxies from WebSky 0.4, flux above ``1 mJy`` at ``100 GHz``, about 370k individual point sources simulated on-the-fly in pixel space from a catalog of sources to the desired resolution and beam. It is complementary to **rg3**. See `the notebook used to produce the catalog <preprocess-templates/catalog/websky_sources_high_flux_catalog_out_1mJy.ipynb>`_ and `the notebook comparing the **rg2** and **rg3** to **rg1** <preprocess-templates/catalog/compare_catalog_to_original_websky.ipynb>`_. Relies on :class:`~pysm3.PointSourcesCatalog`.
+- **rg3**: Background Radio Galaxies from WebSky 0.4, flux below ``1 mJy`` at ``100 GHz``, about 280 million individual point sources pre-simulated at Nside 2048, 4096 and 8192 at a set of input frequencies and smoothed in pixel space to a fiducial beam. It interpolates across HEALPix maps at different frequencies for bandpass integration then applies the differential beam in spherical harmonics space. See the notebooks used to `produce<preprocess-templates/catalog/background_create_websky_catalog_dask.ipynb>`_ and `assemble <preprocess-templates/catalog/background_dask_assemble_catalog.ipynb>`_ the catalogs and the `maps<preprocess-templates/catalog/create_catalog_background.py>`_. Relies on :class:`~pysm3.InterpolatingComponent`.