Skycomponent¶

class Skycomponent(direction=None, frequency=None, name=None, flux=None, shape='Point', polarisation_frame=<data_models.polarisation.PolarisationFrame object>, params=None)[source]¶

Bases: object

Skycomponents are used to represent compact sources on the sky. They possess direction, flux as a function of frequency and polarisation, shape (with params), and polarisation frame.

For example, the following creates and predicts the visibility from a collection of point sources drawn from the GLEAM catalog:

sc = create_low_test_skycomponents_from_gleam(flux_limit=1.0,
                                            polarisation_frame=PolarisationFrame("stokesIQUV"),
                                            frequency=frequency, kind='cubic',
                                            phasecentre=phasecentre,
                                            radius=0.1)
model = create_image_from_visibility(vis, cellsize=0.001, npixel=512, frequency=frequency,
                                    polarisation_frame=PolarisationFrame('stokesIQUV'))

bm = create_low_test_beam(model=model)
sc = apply_beam_to_skycomponent(sc, bm)
vis = predict_skycomponent_visibility(vis, sc)

Attributes Summary

`nchan`
`npol`

Attributes Documentation

nchan¶

npol¶