read_catalog

romanisim.catalog.read_catalog(filename, coord, date=None, bandpasses=None, radius=0.6, **kwargs)

Read a catalog (or directory of catalogs) into a list of CatalogObjects.

Catalog must be readable by astropy.table.Table.read(…) and contain columns enumerated in the docstring for table_to_catalog(…).

Parameters:

filenamestr or None

Filename of catalog, or directory containing healpix catalogs, or None. If None, will query Gaia catalog at the provided coord.

coordastropy.coordinates.SkyCoord

Location around which to generate sources. Not used if the provided filename is a single catalog file.

dateastropy.time.Time

Optional argument to provide a date and time for catalog query. Not used if the provided filename is a single catalog file.

bandpasseslist[str]

Bandpasses for which fluxes are tabulated in the catalog

radius: float

Radius over which to search healpix for source file indicies

Any additional keyword arguments provided will be passed to

`make_gaia_stars` if the `filename` argument is None or

`read_one_healpix` if `filename` is a directory of healpix catalogs.

Returns:

catastropy.Table

Table for use with table_to_catalog to generate catalog for simulation.