Integration kernel for npsf() method. More...

#include <GCTAResponse_helpers.hpp>

Inheritance diagram for cta_npsf_kern_rad_azsym:

Public Member Functions
	cta_npsf_kern_rad_azsym (const GCTAResponseIrf *rsp, const double &roi, const double &psf, const double &logE, const double &theta, const double &phi, const double &zenith, const double &azimuth)

double	eval (const double &delta)
	Integration kernel for npsf() method. 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 GCTAResponseIrf *	m_rsp
	CTA response function. More...

double	m_roi
	ROI radius in radians. More...

double	m_cosroi
	Cosine of ROI radius. More...

double	m_psf
	PSF-ROI centre distance in radians. More...

double	m_cospsf
	Cosine of PSF-ROI centre distance. More...

double	m_sinpsf
	Sine of PSF-ROI centre distance. More...

double	m_logE
	Log10 of true photon energy (E/TeV). More...

double	m_theta
	Offset angle of source in camera system. More...

double	m_phi
	Azimuth angle of source in camera system. More...

double	m_zenith
	Zenith angle of source in Earth system. More...

double	m_azimuth
	Azimuth angle of source in Earth system. 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

Integration kernel for npsf() method.

This class implements the integration kernel needed for the npsf() method. It performs an azimuthal integration of the Point Spread Function (PSF) for a given offset angle \(delta\) using

\[ K(\delta) = \int_{0}^{\phi} PSF(\delta) d\phi \]

(an offset angle of \(\delta=0\) corresponds to the centre of the PSF).

Definition at line 79 of file GCTAResponse_helpers.hpp.

Constructor & Destructor Documentation

cta_npsf_kern_rad_azsym::cta_npsf_kern_rad_azsym	(	const GCTAResponseIrf *	rsp,
		const double &	roi,
		const double &	psf,
		const double &	logE,
		const double &	theta,
		const double &	phi,
		const double &	zenith,
		const double &	azimuth
	)

inline

Definition at line 81 of file GCTAResponse_helpers.hpp.

Member Function Documentation

double cta_npsf_kern_rad_azsym::eval ( const double & delta )

virtual

Integration kernel for npsf() method.

Parameters

[in] delta Distance from PSF centre (radians).

Returns: Azimuthally integrated PSF.

Computes

\[ \int_{0}^{\phi} PSF(\delta) d\phi \]

for a given offset angle \(\delta\).

The azimuthal integration is performed over an arclength given by \(\phi\). The method actually assumes that the PSF is azimuthally symmetric, hence it just multiplies the PSF value by the arclength times the sinus of the offset angle.

Implements GFunction.

Definition at line 247 of file GCTAResponse_helpers.cpp.

References gammalib::is_infinite(), gammalib::is_notanumber(), m_azimuth, m_cospsf, m_cosroi, m_logE, m_phi, m_psf, m_roi, m_rsp, m_sinpsf, m_theta, m_zenith, GCTAResponseIrf::psf(), gammalib::roi_arclength(), and sin().

Member Data Documentation

double cta_npsf_kern_rad_azsym::m_azimuth

protected

Azimuth angle of source in Earth system.

Definition at line 112 of file GCTAResponse_helpers.hpp.

Referenced by eval().

double cta_npsf_kern_rad_azsym::m_cospsf

protected

Cosine of PSF-ROI centre distance.

Definition at line 106 of file GCTAResponse_helpers.hpp.

Referenced by eval().

double cta_npsf_kern_rad_azsym::m_cosroi

protected

Cosine of ROI radius.

Definition at line 104 of file GCTAResponse_helpers.hpp.

Referenced by eval().

double cta_npsf_kern_rad_azsym::m_logE

protected

Log10 of true photon energy (E/TeV).

Definition at line 108 of file GCTAResponse_helpers.hpp.

Referenced by eval().

double cta_npsf_kern_rad_azsym::m_phi

protected

Azimuth angle of source in camera system.

Definition at line 110 of file GCTAResponse_helpers.hpp.

Referenced by eval().

double cta_npsf_kern_rad_azsym::m_psf

protected

PSF-ROI centre distance in radians.

Definition at line 105 of file GCTAResponse_helpers.hpp.

Referenced by eval().

double cta_npsf_kern_rad_azsym::m_roi

protected

ROI radius in radians.

Definition at line 103 of file GCTAResponse_helpers.hpp.

Referenced by eval().

const GCTAResponseIrf* cta_npsf_kern_rad_azsym::m_rsp

protected

CTA response function.

Definition at line 102 of file GCTAResponse_helpers.hpp.

Referenced by eval().

double cta_npsf_kern_rad_azsym::m_sinpsf

protected

Sine of PSF-ROI centre distance.

Definition at line 107 of file GCTAResponse_helpers.hpp.

Referenced by eval().

double cta_npsf_kern_rad_azsym::m_theta

protected

Offset angle of source in camera system.

Definition at line 109 of file GCTAResponse_helpers.hpp.

Referenced by eval().

double cta_npsf_kern_rad_azsym::m_zenith

protected

Zenith angle of source in Earth system.

Definition at line 111 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

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation