py21cmsense.beam.PrimaryBeam

class py21cmsense.beam.PrimaryBeam(frequency: Quantity)

A Base class defining a Primary Beam and the methods it requires to define.

Required methods on subclasses are area(), width(), first_null(), sq_area() and uv_resolution()..

Note that 21cmSense currently only uses the beam width as a means to calculate the beam-crossing time, so precise shape is not very important. For that reason, it is not very important to implement beam sub-classes.

Methods

__init__(frequency)	Method generated by attrs for class PrimaryBeam.
at(frequency)	Get a copy of the object at a new frequency.
from_uvbeam()	Generate the beam object from a pyuvdata.UVBeam object.
new(**kwargs)	Return a clone of this instance, but change kwargs.

Attributes

area	sr].
b_eff	Get the effective beam area (Parsons 2014).
first_null	An approximation of the first null of the beam.
sq_area	The area of the beam^2.
uv_resolution	The UV footprint of the beam.
width	rad].
frequency