Reduce memory and runtime by only loading some columns in OU catalog in GW_host.md tutorial #9
Description
If we decide to move forward with GW host work, and not drop that from the tutorial, consider the below request.
Change the flow of GW host notebook to not load all columns, but limit the columns loaded to reduce memory usage and runtime.
Currently, below the section where the columns are loaded, we do a df_all_candidates.columns to help users decide which columns might be interesting to filter on when selecting which galaxies to explore further as potential host galaxies. This work of looking at the column names available should be done higher up in the notebook where we are exploring the dataset. Then use that info to inform which columns are kept in the catalog read.