GResponse.hpp
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/***************************************************************************
* GResponse.hpp - Abstract response base class *
* ----------------------------------------------------------------------- *
* copyright (C) 2008-2012 by Juergen Knoedlseder *
* ----------------------------------------------------------------------- *
* *
* This program is free software: you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
* *
***************************************************************************/
/**
* @file GResponse.hpp
* @brief Abstract response base class definition
* @author Juergen Knoedlseder
*/
#ifndef GRESPONSE_HPP
#define GRESPONSE_HPP
/* __ Includes ___________________________________________________________ */
#include <string>
#include "GBase.hpp"
#include "GEvent.hpp"
#include "GPhoton.hpp"
#include "GSource.hpp"
#include "GEnergy.hpp"
#include "GTime.hpp"
#include "GModelRadial.hpp"
#include "GFunction.hpp"
#include "GMatrix.hpp"
/* __ Forward declarations _______________________________________________ */
class GObservation;
/***********************************************************************//**
* @class GResponse
*
* @brief Abstract interface for the instrument response function
*
* The response function provides conversion between physical parameters
* (such as source position, flux, ...) and the measured instrumental
* parameters (such as measured energy, photon interaction, ...).
* For a given observation, the irf method returns the instrument response
* for a given event and source model as function of the true photon energy
* and the true photon arrival time.
* The npred method returns the integral of the instrument response function
* over the dataspace. This method is only required for unbinned analysis.
***************************************************************************/
class GResponse : public GBase {
public:
// Constructors and destructors
GResponse(void);
GResponse(const GResponse& rsp);
virtual ~GResponse(void);
// Operators
virtual GResponse& operator= (const GResponse& rsp);
// Pure virtual methods
virtual void clear(void) = 0;
virtual GResponse* clone(void) const = 0;
virtual bool hasedisp(void) const = 0;
virtual bool hastdisp(void) const = 0;
virtual double irf(const GEvent& event,
const GPhoton& photon,
const GObservation& obs) const = 0;
virtual double npred(const GPhoton& photon,
const GObservation& obs) const = 0;
virtual std::string print(void) const = 0;
// Virtual methods
virtual double irf(const GEvent& event,
const GSource& source,
const GObservation& obs) const;
virtual double irf_ptsrc(const GEvent& event,
const GSource& source,
const GObservation& obs) const;
virtual double irf_extended(const GEvent& event,
const GSource& source,
const GObservation& obs) const;
virtual double irf_diffuse(const GEvent& event,
const GSource& source,
const GObservation& obs) const;
virtual double npred(const GSource& source,
const GObservation& obs) const;
virtual double npred_ptsrc(const GSource& source,
const GObservation& obs) const;
virtual double npred_extended(const GSource& source,
const GObservation& obs) const;
virtual double npred_diffuse(const GSource& source,
const GObservation& obs) const;
protected:
// Protected methods
void init_members(void);
void copy_members(const GResponse& rsp);
void free_members(void);
// Npred theta integration kernel
class npred_kern_theta : public GFunction {
public:
npred_kern_theta(const GResponse* rsp,
const GModelRadial* radial,
const GEnergy* srcEng,
const GTime* srcTime,
const GObservation* obs,
const GMatrix* rot) :
m_rsp(rsp),
m_radial(radial),
m_srcEng(srcEng),
m_srcTime(srcTime),
m_obs(obs),
m_rot(rot) { }
double eval(double theta);
protected:
const GResponse* m_rsp; //!< Pointer to response
const GModelRadial* m_radial; //!< Pointer to radial spatial model
const GEnergy* m_srcEng; //!< Pointer to true photon energy
const GTime* m_srcTime; //!< Pointer to true photon arrival time
const GObservation* m_obs; //!< Pointer to observation
const GMatrix* m_rot; //!< Pointer to rotation matrix
};
// Npred phi integration kernel
class npred_kern_phi : public GFunction {
public:
npred_kern_phi(const GResponse* rsp,
const GEnergy* srcEng,
const GTime* srcTime,
const GObservation* obs,
const GMatrix* rot,
double theta,
double sin_theta) :
m_rsp(rsp),
m_srcEng(srcEng),
m_srcTime(srcTime),
m_obs(obs),
m_rot(rot),
m_theta(theta),
m_cos_theta(std::cos(theta)),
m_sin_theta(sin_theta) { }
double eval(double phi);
protected:
const GResponse* m_rsp; //!< Pointer to response
const GEnergy* m_srcEng; //!< Pointer to true photon energy
const GTime* m_srcTime; //!< Pointer to true photon arrival time
const GObservation* m_obs; //!< Pointer to observation
const GMatrix* m_rot; //!< Pointer to rotation matrix
double m_theta; //!< Offset angle (radians)
double m_cos_theta; //!< cosine of offset angle
double m_sin_theta; //!< Sine of offset angle
};
};
#endif /* GRESPONSE_HPP */