LensHaloFit Class Reference

LensHalo class primarily used for fitting point source lenses. More...

#include <analytic_lens.h>

Public Member Functions
	LensHaloFit (const COSMOLOGY &cosmo, int MyNmodes, PosType beta, PosType zlensref, PosType zsourceref)
	Creates a AnaLens which initially has no mass, Use FindLensSimple() to give it mass.
void	PrintLens (bool show_substruct, bool show_stars)
void	FindLensSimple (int Nimages, Point *image_positions, double *y, double **dx_sub)
	Wrapper that allows simple lens to be found with a single lens with a single source and translates result into data structures used in the other code.
bool	SafeFindLensSimple (int Nimages, Point *image_positions, double *y, double **dx_sub, int SafetyNum, PosType PixelSizeRad, std::vector< std::vector< PosType > > &PrecisionBackTracedPos, std::vector< std::vector< PosType > > &alphaTab, bool verbose)
	Same as FindLensSimple but with some tests in it.
void	FindLensSimple (ImageInfo *imageinfo, int Nimages, double *y, double **dx_sub)
	Wrapper that allows simple lens to be found with a single lens with a single source and translates result into data structures used in the other code.
virtual PosType	get_sigma ()
	get the velocity dispersion
virtual PosType	get_fratio ()
	get the axis ratio
virtual PosType	get_pa ()
	get the position angle
virtual PosType	get_rcore ()
	get the core radius
void	setNmodes (int my_Nmodes)
	set the number of perturbation modes – Does the same as LensHaloBaseNSIE::getPerturb_Nmodes().
int	getNmodes ()
	get the number of perturbation modes
void	set_perturbmodes (PosType *ListModes, const int Nmodes)
	set the perturbation modes
void	get_perturbmodes (PosType *ListModes, const int Nmodes)
	get the perturbation modes
void	get_perturbmodes (std::vector< PosType > &ListModes)
	Gets the perturbation modes in the LensHaloFit.
double *	getq ()
	get the ouput of ElliptisizeLens :
void	set_sigma (PosType my_sigma)
	set the velocity dispersion

Detailed Description

LensHalo class primarily used for fitting point source lenses.

The model is a power law with axial modes made to be as elliptical as possible.

Member Function Documentation

FindLensSimple() [1/2]

void LensHaloFit::FindLensSimple	(	ImageInfo *	imageinfo,
		int	Nimages,
		double *	y,
		double **	dx_sub )

Wrapper that allows simple lens to be found with a single lens with a single source and translates result into data structures used in the other code.

The lens is centered on [0,0] source position in lens is updated along with all the modes.

Parameters

imageinfo	Positions of images relative to center of lens. Only imageinfo[].centoid[] is used. Centroids must be in radians.
Nimages	input number of images
y	output source position
dx_sub	dx_sub[Nimages][2] pre-calculated deflections caused by substructures or external masses at each image (in radians)

FindLensSimple() [2/2]

void LensHaloFit::FindLensSimple	(	int	Nimages,
		Point *	image_positions,
		double *	y,
		double **	dx_sub )

Wrapper that allows simple lens to be found with a single lens with a single source and translates result into data structures used in the other code.

The lens is centered on [0,0] source position in lens is updated along with all the modes.

Parameters

Nimages	Number of images to be fit
image_positions	Array of points with point[i].x set to the image positions
y	output source position
dx_sub	dx_sub[Nimages][2] pre-calculated deflections caused by substructures or external masses at each image

get_perturbmodes()

void LensHaloFit::get_perturbmodes	(	PosType *	ListModes,
		const int	Nmodes )

get the perturbation modes

Gets the perturbation modes in the LensHaloFit.

SafeFindLensSimple()

bool LensHaloFit::SafeFindLensSimple	(	int	Nimages,
		Point *	image_positions,
		double *	y,
		double **	dx_sub,
		int	SafetyNum,
		PosType	PixelSizeRad,
		std::vector< std::vector< PosType > > &	PrecisionBackTracedPos,
		std::vector< std::vector< PosType > > &	alphaTab,
		bool	verbose )

Same as FindLensSimple but with some tests in it.

␓

Parameters

Nimages	Number of images to be fit
image_positions	Array of points with point[i].x set to the image positions
y	output source position
dx_sub	dx_sub[Nimages][2] pre-calculated deflections caused by substructures or external masses at each image
SafetyNum	integer of the number of time you want to check the modes
PixelSizeRad	Pixel size in radians used for the maps
PrecisionBackTracedPos	Table that will receive the back-traced images uncertainty (in units of PixelSizeRad).
alphaTab	Table that will receive the deviation angle in radians
verbose	verbose mode switch

set_perturbmodes()

void LensHaloFit::set_perturbmodes	(	PosType *	ListModes,
		const int	Nmodes )

set the perturbation modes

Sets the perturbation modes in the LensHaloFit.

---

The documentation for this class was generated from the following files:

• SLsimLib/include/analytic_lens.h
• SLsimLib/AnalyticNSIE/base_analens.cpp
• SLsimLib/AnalyticNSIE/readfiles_ana.cpp
• SLsimLib/Fitlens/fitlens.cpp