make_galaxies

romanisim.catalog.make_galaxies(coord, n, radius=0.1, index=None, faintmag=26, hlr_at_faintmag=0.6, bandpasses=None, rng=None, seed=50)

Make a simple parametric catalog of galaxies.

Parameters:

coordastropy.coordinates.SkyCoord

Location around which to generate sources.

nint

number of sources to generate

radiusfloat

radius in degrees of cap in which to uniformly generate sources

indexint

power law index of magnitudes

faintmagfloat

faintest AB magnitude for which to generate sources Note this magnitude is in a “fiducial” band which is not observed. Actual requested bandpasses are equal to this fiducial band plus 1 mag of Gaussian noise.

hlr_at_faintmagfloat

typical half light radius at faintmag (arcsec)

bandpasseslist[str]

list of names of bandpasses for which to generate fluxes.

rnggalsim.BaseDeviate

random number generator to use

seedint

seed to use for random numbers, only used if rng is None

Returns:

catalogastropy.Table

Table for use with table_to_catalog to generate catalog for simulation.