PointSource – Point Source Rendering Modules

Point Source Classes Available

• SinglePointSource - Class to generate single point source model

paltas.PointSource.point_source_base module

Provides the base class for specifying the point source of a lensing system.

This module contains the base class that all the point source classes will build from. Because the steps for rendering a source can vary between different models, the required functions are very sparse.

class paltas.PointSource.point_source_base.PointSourceBase(point_source_parameters)

Bases: object

Base class for producing lenstronomy PointSource arguments

Parameters:

point_source_parameters (dict) – dictionary with source-specific parameters.

Notes

Has no required parameters by default.

check_parameterization(required_params)

Check that all the required parameters are present in the point_source_parameters.

Parameters:

required_params ([str,...]) – A list of strings containing the required parameters.

draw_point_source()

Return lenstronomy PointSource names and kwargs

Returns:

(list,list) A list containing the model name(s), and a list containing the model kwargs dictionaries.

required_parameters = ()

update_parameters(point_source_parameters=None)

Update the class parameters

Parameters:

point_source_parameters (dict) – A dictionary containing all the parameters needed to draw point sources.

paltas.PointSource.single_point_source module

Provides class for specifying a single point source

This module contains the class required to provide a single point source as the source for paltas.

class paltas.PointSource.single_point_source.SinglePointSource(point_source_parameters)

Bases: PointSourceBase

Class to generate single point source model

Parameters:

point_source_parameters (dict) – dictionary with source-specific parameters.

Notes:

Required Parameters

• magnitude - AB absolute magnitude of the point source

• x_point_source - x-coordinate lens center in units of arcseconds

• y_point_source - y-coordinate lens center in units of arcseconds

• z_lens - main deflector redshift

• output_ab_zeropoint - AB magnitude zeropoint of the detector

• compute_time_delay - bool determining if time delays will be computed and added to the returned kwargs

Optional Parameters

• mag_pert - list of 4 fractional magnification perturbations that will be applied to each point source image

• kappa_ext - external convergence used to calculate time delays

• time_delay_error - list of errors on the time delay measurements in units of days.

draw_point_source()

Return lenstronomy PointSource kwargs

Returns:

(list,list) A list containing the model names(s), and

a list containing the model kwargs dictionaries.

required_parameters = ('x_point_source', 'y_point_source', 'magnitude', 'output_ab_zeropoint', 'compute_time_delays')