Source windows functions

class isitgr.sources.SourceWindow

Abstract base class for a number count/lensing/21cm source window function. A list of instances of these classes can be assigned to the SourceWindows field of model.CAMBparams.

Note that source windows can currently only be used in flat models.

Variables:

• source_type – (integer/string, one of: 21cm, counts, lensing)
• bias – (float64)
• dlog10Ndm – (float64)

class isitgr.sources.GaussianSourceWindow

Bases: isitgr.sources.SourceWindow

A Gaussian W(z) source window function.

Variables:

• redshift – (float64)
• sigma – (float64)

class isitgr.sources.SplinedSourceWindow(**kwargs)

Bases: isitgr.sources.SourceWindow

A numerical W(z) source window function constructed by interpolation from a numerical table.

set_table(z, W)

Set arrays of z and W(z) for cublic spline interpolation. Note that W(z) is the total count distribution observed, not a fractional selection function on an underlying distribution.

Parameters:

• z – array of redshift values (monotonically increasing)
• W – array of window function values. It must be well enough sampled to smoothly cubic-spline interpolate