updated readme

README.md

@@ -37,7 +37,7 @@ The following commands use the `prefect` framework to link together individual t
 
 ## Sky-model catalogues
 
-The `flint_skymodel` command will attempt to create an in-field sky-model for a particular measurement set using existing source catalogues and an idealised primary beam response. At the moment these catalogue names are hard-coded. Reach out if you need these catalogues. In hopefully the near future this can be relaxed to allow a user-specific catalogue.
+The `flint_skymodel` command will attempt to create an in-field sky-model for a particular measurement set using existing source catalogues and an idealised primary beam response. 'Supported' catalogues are those available through `flint_catalogue download`. Note this mode has not be thoroughly tested and may not be out-of-date relative to how the `flint_flow_continuum_pipeline` operates. In the near future this may be expanded. 
 
 If calibrating a bandpass (i.e. `1934-638`) `flint` will use the packaged source model. At the moment this is only provided for `calibrate`.