make_stars

romanisim.catalog.make_stars(coord, n, radius=0.1, index=None, faintmag=26, truncation_radius=None, bandpasses=None, rng=None, seed=51)

Make a simple parametric catalog of stars.

If truncation radius is None, this makes a uniform distribution. If the truncation_radius is not None, it makes a King distribution where the core radius is given by the radius and the truncation radius is given by truncation_radius.

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 generate sources

indexint

power law index of magnitudes; uniform density & standard candle implies 3/5.

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.

truncation_radiusfloat

truncation radius of cluster if not None; otherwise ignored.

bandpasseslist[str]

list of names of bandpasses for which to generate fluxes.

rnggalsim.BaseDeviate

random number generator to use

seedint

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

Returns:

catalogastropy.Table

Table for use with table_to_catalog to generate catalog for simulation.