cta_psf_radial_kern_phi Class Reference

Kernel for Psf phi angle integration used for stacked analysis. More...

#include <GCTAResponse_helpers.hpp>

Inheritance diagram for cta_psf_radial_kern_phi:

Public Member Functions
	cta_psf_radial_kern_phi (const GModelSpatialRadial *model, const GEnergy &srcEng, const GTime &srcTime, const double &sin_fact, const double &cos_fact)
double	eval (const double &phi)
	Kernel for azimuthal radial model integration. 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...

Protected Attributes
const GModelSpatialRadial *	m_model
	Radial model. More...
GEnergy	m_srcEng
	True photon energy. More...
GTime	m_srcTime
	True photon arrival time. More...
double	m_sin_fact
	sin(delta)*sin(delta_mod) More...
double	m_cos_fact
	cos(delta)*cos(delta_mod) 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

Kernel for Psf phi angle integration used for stacked analysis.

Definition at line 1181 of file GCTAResponse_helpers.hpp.

Constructor & Destructor Documentation

cta_psf_radial_kern_phi::cta_psf_radial_kern_phi ( const GModelSpatialRadial *  model, const GEnergy &  srcEng, const GTime &  srcTime, const double &  sin_fact, const double &  cos_fact  )

inline

Definition at line 1183 of file GCTAResponse_helpers.hpp.

Member Function Documentation

double cta_psf_radial_kern_phi::eval ( const double &  phi )

virtual

Kernel for azimuthal radial model integration.

Parameters

[in]

phi

Azimuth angle (radians).

Returns

Radial model value.

Computes the value of the radial model at the position \((\delta,\phi)\) given in point spread function coordinates. The \(\theta\) angle of the radial model is computed using

\[ \theta = \arccos \left( \cos \delta \cos \zeta + \sin \delta \sin \zeta \cos \phi \right) \]

where \(\delta\) is the angle between true and measured photon direction, \(\zeta\) is the angle between model centre and measured photon direction, and \(\phi\) is the azimuth angle with respect to the measured photon direction, where \(\phi=0\) corresponds to the connecting line between model centre and measured photon direction.

Implements GFunction.

Definition at line 1914 of file GCTAResponse_helpers.cpp.

References gammalib::acos(), cos(), GModelSpatialRadial::eval(), gammalib::is_infinite(), gammalib::is_notanumber(), m_cos_fact, m_model, m_sin_fact, m_srcEng, m_srcTime, gammalib::rad2deg, and GModelSpatialRadial::theta_max().

Member Data Documentation

double cta_psf_radial_kern_phi::m_cos_fact

protected

cos(delta)*cos(delta_mod)

Definition at line 1199 of file GCTAResponse_helpers.hpp.

Referenced by eval().

const GModelSpatialRadial* cta_psf_radial_kern_phi::m_model

protected

Radial model.

Definition at line 1195 of file GCTAResponse_helpers.hpp.

Referenced by eval().

double cta_psf_radial_kern_phi::m_sin_fact

protected

sin(delta)*sin(delta_mod)

Definition at line 1198 of file GCTAResponse_helpers.hpp.

Referenced by eval().

GEnergy cta_psf_radial_kern_phi::m_srcEng

protected

True photon energy.

Definition at line 1196 of file GCTAResponse_helpers.hpp.

Referenced by eval().

GTime cta_psf_radial_kern_phi::m_srcTime

protected

True photon arrival time.

Definition at line 1197 of file GCTAResponse_helpers.hpp.

Referenced by eval().

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

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