#include <GCTAResponse_helpers.hpp>

Inheritance diagram for cta_psf_elliptical_kern_omega:

Public Member Functions
	cta_psf_elliptical_kern_omega (const GCTAResponseCube rsp, const GModelSpatialElliptical model, const GSkyDir &srcDir, const GEnergy &srcEng, const GTime &srcTime, const double &posangle_obs, const double &rho, const double &cos_psf, const double &sin_psf)

double	eval (const double &omega)
	Kernel for elliptical model integration over azimuth angle. More...

Public Member Functions inherited from GFunction
	GFunction (void)
	Void constructor. More...

	GFunction (const GFunction &function)
	Copy constructor. More...

virtual	~GFunction (void)
	Destructor. More...

GFunction &	operator= (const GFunction &function)
	Assignment operator. More...

Public Attributes
const GCTAResponseCube *	m_rsp
	CTA response. More...

const GModelSpatialElliptical *	m_model
	Elliptical model. More...

GSkyDir	m_srcDir
	True photon sky direction. More...

GEnergy	m_srcEng
	True photon energy. More...

GTime	m_srcTime
	True photon time. More...

double	m_posangle_obs
	Measured photon position angle from model centre. More...

double	m_rho
	Model zenith angle. More...

double	m_cos_psf
	Cosine term for PSF offset angle computation. More...

double	m_sin_psf
	Sine term for PSF offset angle computation. More...

Additional Inherited Members
Protected Member Functions inherited from GFunction
void	init_members (void)
	Initialise class members. More...

void	copy_members (const GFunction &function)
	Copy class members. More...

void	free_members (void)
	Delete class members. More...

Detailed Description

Definition at line 1298 of file GCTAResponse_helpers.hpp.

Constructor & Destructor Documentation

cta_psf_elliptical_kern_omega::cta_psf_elliptical_kern_omega	(	const GCTAResponseCube *	rsp,
		const GModelSpatialElliptical *	model,
		const GSkyDir &	srcDir,
		const GEnergy &	srcEng,
		const GTime &	srcTime,
		const double &	posangle_obs,
		const double &	rho,
		const double &	cos_psf,
		const double &	sin_psf
	)

inline

Definition at line 1300 of file GCTAResponse_helpers.hpp.

Member Function Documentation

double cta_psf_elliptical_kern_omega::eval ( const double & omega )

virtual

Kernel for elliptical model integration over azimuth angle.

Parameters

[in] omega Azimuth angle (radians).

Computes

\[ K(\omega | \rho, E, t) = S_{\rm p}(\omega | \rho, E, t) \, PSF(\omega | \rho) \]

where \(\omega\) is the azimuth angle with respect to the model centre, counted counterclockwise from the vector connecting the model centre to the observed photon direction, and \(\rho\) is the radial distance from the model centre.

From the coordinates \((\rho,\omega)\) in the model system, the method computes the angle between the true ( \(\vec{p}\)) and observed ( \(\vec{p'}\)) photon arrival direction using

\[\delta = \arccos(\cos \rho \cos \rho_{\rm obs} + \sin \rho \sin \rho_{\rm obs} \cos \omega)\]

where \(\rho_{\rm obs}\) is the angular distance between the observed photon arrival direction \(\vec{p'}\) and the model centre \(\vec{m}\). \(\delta\) is used to compute the value of the point spread function.

Implements GFunction.

Definition at line 2160 of file GCTAResponse_helpers.cpp.

References gammalib::acos(), cos(), gammalib::deg2rad, GModelSpatialElliptical::eval(), gammalib::is_infinite(), gammalib::is_notanumber(), m_cos_psf, m_model, m_posangle_obs, m_rho, m_rsp, m_sin_psf, m_srcDir, m_srcEng, m_srcTime, GModelSpatialElliptical::posangle(), GCTAResponseCube::psf(), gammalib::rad2deg, GModelSpatialElliptical::semimajor(), GModelSpatialElliptical::semiminor(), sin(), and sqrt().

Member Data Documentation

double cta_psf_elliptical_kern_omega::m_cos_psf

Cosine term for PSF offset angle computation.

Definition at line 1327 of file GCTAResponse_helpers.hpp.

Referenced by eval().

const GModelSpatialElliptical* cta_psf_elliptical_kern_omega::m_model

Elliptical model.

Definition at line 1321 of file GCTAResponse_helpers.hpp.

Referenced by eval().

double cta_psf_elliptical_kern_omega::m_posangle_obs

Measured photon position angle from model centre.

Definition at line 1325 of file GCTAResponse_helpers.hpp.

Referenced by eval().

double cta_psf_elliptical_kern_omega::m_rho

Model zenith angle.

Definition at line 1326 of file GCTAResponse_helpers.hpp.

Referenced by eval().

const GCTAResponseCube* cta_psf_elliptical_kern_omega::m_rsp

CTA response.

Definition at line 1320 of file GCTAResponse_helpers.hpp.

Referenced by eval().

double cta_psf_elliptical_kern_omega::m_sin_psf

Sine term for PSF offset angle computation.

Definition at line 1328 of file GCTAResponse_helpers.hpp.

Referenced by eval().

GSkyDir cta_psf_elliptical_kern_omega::m_srcDir

True photon sky direction.

Definition at line 1322 of file GCTAResponse_helpers.hpp.

Referenced by eval().

GEnergy cta_psf_elliptical_kern_omega::m_srcEng

True photon energy.

Definition at line 1323 of file GCTAResponse_helpers.hpp.

Referenced by eval().

GTime cta_psf_elliptical_kern_omega::m_srcTime

True photon time.

Definition at line 1324 of file GCTAResponse_helpers.hpp.

Referenced by eval().

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

inst/cta/src/GCTAResponse_helpers.hpp
inst/cta/src/GCTAResponse_helpers.cpp

Public Member Functions

Public Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation