GLATEfficiency.cpp
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/***************************************************************************
* GLATEfficiency.cpp - Fermi-LAT IRF efficiency factor functor *
* ----------------------------------------------------------------------- *
* copyright (C) 2012-2013 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 GLATEfficiency.cpp
* @brief Fermi-LAT IRF efficiency factor functor class implementation
* @author Juergen Knoedlseder
*/
/* __ Includes ___________________________________________________________ */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "GLATEfficiency.hpp"
#include "GTools.hpp"
/* __ Method name definitions ____________________________________________ */
/* __ Macros _____________________________________________________________ */
/* __ Coding definitions _________________________________________________ */
/* __ Debug definitions __________________________________________________ */
/* __ Constants __________________________________________________________ */
/*==========================================================================
= =
= Constructors/destructors =
= =
==========================================================================*/
/***********************************************************************//**
* @brief Void constructor
***************************************************************************/
GLATEfficiency::GLATEfficiency(void)
{
// Initialise class members
init_members();
// Return
return;
}
/***********************************************************************//**
* @brief Assignment constructor
*
* @param[in] pars Efficiency factor parameters.
***************************************************************************/
GLATEfficiency::GLATEfficiency(const std::vector<double>& pars)
{
// Initialise class members
init_members();
// Assign members
m_a0 = pars.at(0);
m_b0 = pars.at(1);
m_a1 = pars.at(2);
m_logEb1 = pars.at(3);
m_a2 = pars.at(4);
m_logEb2 = pars.at(5);
// Precompute additional offsets
m_b1 = (m_a0 - m_a1)*m_logEb1 + m_b0;
m_b2 = (m_a1 - m_a2)*m_logEb2 + m_b1;
// Return
return;
}
/***********************************************************************//**
* @brief Copy constructor
*
* @param[in] eff Efficiency factor functor.
***************************************************************************/
GLATEfficiency::GLATEfficiency(const GLATEfficiency& eff)
{
// Initialise class members
init_members();
// Copy members
copy_members(eff);
// Return
return;
}
/***********************************************************************//**
* @brief Destructor
***************************************************************************/
GLATEfficiency::~GLATEfficiency(void)
{
// Free members
free_members();
// Return
return;
}
/*==========================================================================
= =
= Operators =
= =
==========================================================================*/
/***********************************************************************//**
* @brief Assignment operator
*
* @param[in] eff Efficiency factor functor.
* @return Efficiency factor functor.
***************************************************************************/
GLATEfficiency& GLATEfficiency::operator=(const GLATEfficiency& eff)
{
// Execute only if object is not identical
if (this != &eff) {
// Free members
free_members();
// Initialise private members
init_members();
// Copy members
copy_members(eff);
} // endif: object was not identical
// Return this object
return *this;
}
/***********************************************************************//**
* @brief Functor operator
*
* @param[in] logE log10 of energy (MeV).
***************************************************************************/
double GLATEfficiency::operator() (const double& logE) const
{
// Initialise the result
double factor = 0;
// Set efficiency factor depending on the energy domain
if (logE < m_logEb1) {
factor = m_a0*logE + m_b0;
}
else if (logE < m_logEb2) {
factor = m_a1*logE + m_b1;
}
else {
factor = m_a2*logE + m_b2;
}
// Return factor
return factor;
}
/*==========================================================================
= =
= Public methods =
= =
==========================================================================*/
/***********************************************************************//**
* @brief Clear efficiency factor functor
*
* This method properly resets the object to an initial state.
***************************************************************************/
void GLATEfficiency::clear(void)
{
// Free class members
free_members();
// Initialise members
init_members();
// Return
return;
}
/***********************************************************************//**
* @brief Clone efficiency factor functor
*
* @return Pointer to deep copy of efficiency factor functor.
***************************************************************************/
GLATEfficiency* GLATEfficiency::clone(void) const
{
return new GLATEfficiency(*this);
}
/***********************************************************************//**
* @brief Print efficiency factors
*
* @param[in] chatter Chattiness (defaults to NORMAL).
* @return String containing efficiency factors information.
***************************************************************************/
std::string GLATEfficiency::print(const GChatter& chatter) const
{
// Initialise result string
std::string result;
// Continue only if chatter is not silent
if (chatter != SILENT) {
// Append header
result.append("=== GLATEfficiency ===");
// Append information
result.append("\n"+gammalib::parformat("Scale 1 (a0)")+gammalib::str(m_a0));
result.append("\n"+gammalib::parformat("Scale 2 (a1)")+gammalib::str(m_a1));
result.append("\n"+gammalib::parformat("Scale 3 (a2)")+gammalib::str(m_a2));
result.append("\n"+gammalib::parformat("Offset 1 (b0)")+gammalib::str(m_b0));
result.append("\n"+gammalib::parformat("Offset 2 (b1)")+gammalib::str(m_b1));
result.append("\n"+gammalib::parformat("Offset 3 (b2)")+gammalib::str(m_b2));
result.append("\n"+gammalib::parformat("Energy domains 1/2 limit (logEb1)")+gammalib::str(m_logEb1));
result.append("\n"+gammalib::parformat("Energy domains 2/3 limit (logEb2)")+gammalib::str(m_logEb2));
} // endif: chatter was not silent
// Return result
return result;
}
/*==========================================================================
= =
= Private methods =
= =
==========================================================================*/
/***********************************************************************//**
* @brief Initialise class members
***************************************************************************/
void GLATEfficiency::init_members(void)
{
// Initialise members
m_a0 = 0.0;
m_a1 = 0.0;
m_a2 = 0.0;
m_b0 = 0.0;
m_b1 = 0.0;
m_b2 = 0.0;
m_logEb1 = 0.0;
m_logEb2 = 0.0;
// Return
return;
}
/***********************************************************************//**
* @brief Copy class members
*
* @param[in] eff Efficiency factor functor.
***************************************************************************/
void GLATEfficiency::copy_members(const GLATEfficiency& eff)
{
// Copy members
m_a0 = eff.m_a0;
m_a1 = eff.m_a1;
m_a2 = eff.m_a2;
m_b0 = eff.m_b0;
m_b1 = eff.m_b1;
m_b2 = eff.m_b2;
m_logEb1 = eff.m_logEb1;
m_logEb2 = eff.m_logEb2;
// Return
return;
}
/***********************************************************************//**
* @brief Delete class members
***************************************************************************/
void GLATEfficiency::free_members(void)
{
// Return
return;
}