slsim.FalsePositives package

Submodules

slsim.FalsePositives.false_positive_pop module

class slsim.FalsePositives.false_positive_pop.FalsePositivePop(central_galaxy_population, intruder_populations, intruder_number_choices=[1, 2, 3], weights_for_intruder_number=None, cosmo=None, los_pop=None, test_area_factor=1, clustering_mode='area', include_central_galaxy_light=True)

Bases: FalsePositivePopBase

Class to perform samples of false positive population.

This class generates configurations consisting of a central deflector and one or multiple sources drawn from provided populations (e.g., surrounding galaxies, stars, quasars). It combines the functionality of single-source and multi-source generation with flexible clustering modes.

Note that these sources are not lensed by the deflector, but are positioned in a way that they could be misidentified as lensed images of a source due to the deflector, thus creating a “false positive” lensing configuration.

draw_false_positive(number=1)

Draw given number of false positive systems.

Parameters:

number – number of false positive requested. The default value is 1.

Returns:

list of FalsePositive() instance (or single instance if number=1).

draw_sources(z_max=None, test_area=None, theta_e=None)

Draws sources from all populations based on choices and positions them.

Parameters:

• z_max – maximum redshift for drawn source.

• test_area – area to draw source coordinates for ‘area’ clustering mode.

• theta_e – Einstein radius of the deflector, needed for ‘ring’/’random’ modes.

Returns:

A Source instance or a list of Source instances.

class slsim.FalsePositives.false_positive_pop.FalsePositivePopBase(central_galaxy_population, cosmo=None, los_pop=None)

Bases: object

Base class for false positive population generation.

This class provides common functionality and can be extended to create specific types of false positive populations.

draw_deflector()

Draw and prepare a deflector (lens) with tolerance-based z_max.

Returns:

a deflector instance and z_max for sources.

slsim.FalsePositives.false_positive module

class slsim.FalsePositives.false_positive.FalsePositive(source_class, deflector_class, cosmo, los_class=None, include_deflector_light=True, field_galaxies=None)

Bases: Lens

Class to manage individual false positive.

Here, false positives refer to a configuration that includes an elliptical galaxy at the center with blue galaxies surrounding the central elliptical galaxy.

lenstronomy_kwargs(band=None, time=None, **kwargs)

Generates lenstronomy dictionary conventions for the class object.

Parameters:

• band (string or None) – imaging band, if =None, will result in un- normalized amplitudes

• time (float or None) – observation time (optional, used for time-variable sources like quasars; ignored for non-variable sources)

Module contents