When joining an add-on catalog to a large catalog such as cosmoDC2, a use case that is currently not supported is to be able to replace specific rows in the large catalog. An example is using the AGN catalog as an add-on. The composite catalog needs to have only the rows having an AGN component to be modified from the original. I made a composite catalog "by hand" in
this notebook I first matched the galaxy-id's between the large catalog and the AGN catalog (because only some of the AGN galaxies appeared in cosmoDC2_v1.1.4_small). Then I matched the remaining AGN galaxies with those in the cosmoDC2 catalog and replaced the cosmoDC2 magnitudes with the magnitudes from the AGN catalog.( The reader for the AGN catalog is setup to deliver the sum of galaxy + AGN contributions.)
When joining an add-on catalog to a large catalog such as cosmoDC2, a use case that is currently not supported is to be able to replace specific rows in the large catalog. An example is using the AGN catalog as an add-on. The composite catalog needs to have only the rows having an AGN component to be modified from the original. I made a composite catalog "by hand" in
this notebook I first matched the galaxy-id's between the large catalog and the AGN catalog (because only some of the AGN galaxies appeared in cosmoDC2_v1.1.4_small). Then I matched the remaining AGN galaxies with those in the cosmoDC2 catalog and replaced the cosmoDC2 magnitudes with the magnitudes from the AGN catalog.( The reader for the AGN catalog is setup to deliver the sum of galaxy + AGN contributions.)