CosmoSim on the Command Line

The CosmoSim library provides a range of scripts.

• CosmoSim.datagen is the main CLI tool
  • bulk generation of images
• CosmoSim.dataset
  • random generation of parameters for data sets
  • the output is a CSV file to be read by datagen.py
  • TODO further documentation
• CosmoSim.roulettegen Roulette Resimulation
  • generate images from a set of roulette amplitudes

Other scripts

• compare.py
  • Quantitatively compare two batches of images, intended for regression testing.
• amplitudes.py
  • Generate a file with roulette amplitudes for the SIS lens.
  • For development use only
  • The generated files are included in the release packages and found by the library.

Source Models Supported

The following names should be used to specify the source. Other names are defined, but will be deprecated.

• "Spherical" : Gaussian light distribution
• "Ellipsoid" : Ellipsoid source with Gaussian distribution
• "SersicSphere" : Spherical Source with Sersic profile
• "SersicEllipsoid" : Ellipsoid source with Sersic profile
• "Triangle" - a coloured triangle, for better visualisation of distortion effects
• "Image (Einstein)" - a portrait of Einstein, for fun

Lens and Simulation Models Supported

Display name	Lens	Simulation	Sampled	Alias
:-	:-	:-	:-	Alias
"Point Mass (exact)"	Point Mass	Exact (PM)	No	"p"
"Point Mass (roulettes)"	Point Mass	Roulette (PM)1	No	"r"
"Sampled Roulette SIS"	SIS	Roulette	Yes	"ss"
"Sampled Roulette SIE"	SIE	Roulette	Yes	"srousie"
"Sampled Raytrace SIS"	SIS	Raytrace	Yes	"pss"
"Sampled Raytrace SIE"	SIE	Raytrace	Yes	"sraysie"
"Roulette SIS"	SIS	Roulette	No	"fs"
"Roulette SIE"	SIE	Roulette	No	"rousie"
"Raytrace SIS"	SIS	Raytrace	No	"rs"
"Raytrace SIE"	SIE	Raytrace	No	"raysie"

The display names are used in the GUI and should be used whereever spaces do not confuse the parser. The alias can be used in data files where space may cause problems.

1. Roulette simulation for point mass lenses is implemented as a special case and does not use the generic roulette simulator. ↩