py21cmsense.beam.GaussianBeam

class py21cmsense.beam.GaussianBeam(frequency: Quantity, dish_size: Quantity)

A simple Gaussian Primary beam.

Parameters:

• frequency (astropy.units.quantity.Quantity) – The fiducial frequency at which the beam operates, assumed to be in MHz unless otherwise defined.

• dish_size (astropy.units.quantity.Quantity) – The size of the (assumed circular) dish, assumed to be in meters unless otherwise defined. This generates the beam size.

Methods

__init__(frequency, dish_size)	Method generated by attrs for class GaussianBeam.
at(frequency)	Get a copy of the object at a new frequency.
clone(**kwargs)	Create a new beam with updated parameters.
from_uvbeam()	Construct the beam from a pyuvdata.UVBeam object.
new(**kwargs)	Return a clone of this instance, but change kwargs.

Attributes

area	The integral of the beam over angle, in sr.
b_eff	Get the effective beam area (Parsons 2014).
dish_size_in_lambda	The dish size in units of wavelengths.
first_null	The angle of the first null of the beam.
fwhm	The full-width half maximum of the beam.
sq_area	The integral of the squared beam, in sr.
uv_resolution	The appropriate resolution of a UV cell given the beam size.
wavelength	The wavelength of the observation.
width	The width of the beam (i.e. sigma), in radians.
dish_size
frequency