py21cmsense.beam.GaussianBeam

class py21cmsense.beam.GaussianBeam(dish_size: Annotated[Quantity, PhysicalType('length')])

A simple Gaussian Primary beam.

Parameters:

• frequency – 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__(dish_size)	Method generated by attrs for class GaussianBeam.
area(frequency)	Compute the integral of the beam over angle, in sr.
b_eff(frequency)	Get the effective beam area (Parsons 2014).
clone(**kwargs)	Create a new beam with updated parameters.
dish_size_in_lambda(frequency)	Compute the dish size in units of wavelengths.
first_null(frequency)	Get the zenith angle of the first null of the beam.
from_uvbeam()	Construct the beam from a pyuvdata.UVBeam object.
fwhm(frequency)	Compute the full-width half maximum of the beam.
new(**kwargs)	Return a clone of this instance, but change kwargs.
sq_area(frequency)	Compute the integral of the squared beam, in sr.
uv_resolution(frequency)	Compute the appropriate resolution of a UV cell given the beam size.
width(frequency)	Compute the width of the beam (i.e. sigma), in radians.

Attributes

dish_size