CTA IRF background model class. More...

#include <GCTAModelIrfBackground.hpp>

Inheritance diagram for GCTAModelIrfBackground:

Classes
class	npred_roi_kern_phi

class	npred_roi_kern_theta

Public Member Functions
	GCTAModelIrfBackground (void)
	Void constructor. More...

	GCTAModelIrfBackground (const GXmlElement &xml)
	Constructor. More...

	GCTAModelIrfBackground (const GModelSpectral &spectral)
	Construct from spectral component. More...

	GCTAModelIrfBackground (const GCTAModelIrfBackground &bgd)
	Copy constructor. More...

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

GCTAModelIrfBackground &	operator= (const GCTAModelIrfBackground &bgd)
	Assignment operator. More...

virtual void	clear (void)
	Clear CTA instrument background model. More...

virtual GCTAModelIrfBackground *	clone (void) const
	Clone CTA instrument background model. More...

virtual std::string	classname (void) const
	Return class name. More...

virtual std::string	type (void) const
	Return data model type. More...

virtual bool	is_constant (void) const
	Signals if sky model is temporally constant. More...

virtual double	eval (const GEvent &event, const GObservation &obs, const bool &gradients=false) const
	Return background rate in units of events MeV \(^{-1}\) s \(^{-1}\) sr \(^{-1}\). More...

virtual double	npred (const GEnergy &obsEng, const GTime &obsTime, const GObservation &obs) const
	Return spatially integrated background rate in units of events MeV \(^{-1}\) s \(^{-1}\). More...

virtual GCTAEventList *	mc (const GObservation &obs, GRan &ran) const
	Return simulated list of events. More...

virtual void	read (const GXmlElement &xml)
	Read CTA instrument background model from XML element. More...

virtual void	write (GXmlElement &xml) const
	Write CTA instrument background model into XML element. More...

virtual std::string	print (const GChatter &chatter=NORMAL) const
	Print CTA instrument background model information. More...

GModelSpectral *	spectral (void) const
	Return spectral model component. More...

GModelTemporal *	temporal (void) const
	Return temporal model component. More...

void	spectral (const GModelSpectral *spectral)
	Set spectral model component. More...

void	temporal (const GModelTemporal *temporal)
	Set temporal model component. More...

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

	GModelData (const GXmlElement &xml)
	XML constructor. More...

	GModelData (const GModelData &model)
	Copy constructor. More...

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

virtual GModelData &	operator= (const GModelData &model)
	Assignment operator. More...

virtual GVector	eval (const GObservation &obs, GMatrixSparse *gradients=NULL) const
	Return model values and gradients. More...

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

	GModel (const GXmlElement &xml)
	XML constructor. More...

	GModel (const GModel &model)
	Copy constructor. More...

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

virtual GModel &	operator= (const GModel &model)
	Assignment operator. More...

virtual GModelPar &	operator[] (const int &index)
	Returns reference to model parameter by index. More...

virtual const GModelPar &	operator[] (const int &index) const
	Returns reference to model parameter by index (const version) More...

virtual GModelPar &	operator[] (const std::string &name)
	Returns reference to model parameter by name. More...

virtual const GModelPar &	operator[] (const std::string &name) const
	Returns reference to model parameter by name const version) More...

int	size (void) const
	Return number of parameters in model. More...

int	scales (void) const
	Return number of scale parameters in model. More...

GModelPar &	at (const int &index)
	Returns reference to model parameter by index. More...

const GModelPar &	at (const int &index) const
	Returns reference to model parameter by index (const version) More...

bool	has_par (const std::string &name) const
	Checks if parameter name exists. More...

bool	has_scales (void) const
	Signals that model has scales. More...

const std::string &	name (void) const
	Return parameter name. More...

void	name (const std::string &name)
	Set parameter name. More...

const double &	ts (void) const
	Return Test Statistic value. More...

void	ts (const double &ts)
	Set Test Statistic value. More...

const bool &	tscalc (void) const
	Return Test Statistic computation flag. More...

void	tscalc (const bool &tscalc)
	Set Test Statistic computation flag. More...

const bool &	has_ts (void) const
	Signals that model has Test Statistics value. More...

std::string	instruments (void) const
	Returns instruments to which model applies. More...

void	instruments (const std::string &instruments)
	Set instruments to which model applies. More...

GModelPar &	scale (const int &index)
	Returns reference to scale parameter by index. More...

const GModelPar &	scale (const int &index) const
	Returns reference to scale parameter by index (const version) More...

GModelPar	scale (const std::string &instrument) const
	Returns model scale factor for a given instrument. More...

void	scale (const GModelPar &par)
	Set model scale factor for a given instrument. More...

std::string	ids (void) const
	Returns observation identifiers to which model applies. More...

void	ids (const std::string &ids)
	Set observation identifiers to which model applies. More...

bool	is_valid (const std::string &instruments, const std::string &ids) const
	Verifies if model is valid for a given instrument and identifier. More...

const GModelAssociations &	associations (void) const
	Return model associations. More...

void	associations (const GModelAssociations &associations)
	Set model associations. More...

const bool &	has_eval_indices (void) const
	Signals that parameter indices updated by eval() method were set. More...

const std::vector< int > &	eval_indices (void) const
	Return vector of parameter indices updated by eval() method. More...

Public Member Functions inherited from GBase
virtual	~GBase (void)
	Destructor. More...

Private Member Functions
void	init_members (void)
	Initialise class members. More...

void	copy_members (const GCTAModelIrfBackground &bgd)
	Copy class members. More...

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

void	set_pointers (void)
	Set pointers. More...

bool	valid_model (void) const
	Verifies if model has all components. More...

GModelSpectral *	xml_spectral (const GXmlElement &spectral) const
	Return pointer to spectral model from XML element. More...

GModelTemporal *	xml_temporal (const GXmlElement &temporal) const
	Return pointer to temporal model from XML element. More...

Private Attributes
GModelSpectral *	m_spectral
	Spectral model. More...

GModelTemporal *	m_temporal
	Temporal model. More...

std::vector< std::string >	m_npred_names
	Model names. More...

std::vector< GEnergy >	m_npred_energies
	Model energy. More...

std::vector< GTime >	m_npred_times
	Model time. More...

std::vector< double >	m_npred_values
	Model values. More...

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

void	copy_members (const GModelData &model)
	Copy class members. More...

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

Protected Member Functions inherited from GModel
void	init_members (void)
	Initialise class members. More...

void	copy_members (const GModel &model)
	Copy class members. More...

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

void	read_attributes (const GXmlElement &xml)
	Read model attributes. More...

void	write_attributes (GXmlElement &xml) const
	Write model attributes. More...

std::string	print_attributes (void) const
	Print model attributes. More...

void	read_scales (const GXmlElement &xml)
	Read instrument scales from XML element. More...

void	write_scales (GXmlElement &xml) const
	Write instrument scales into XML element. More...

Protected Attributes inherited from GModel
std::string	m_name
	Model name. More...

std::vector< std::string >	m_instruments
	Instruments to which model applies. More...

std::vector< GModelPar >	m_scales
	Model instrument scale factors. More...

std::vector< std::string >	m_ids
	Identifiers to which model applies. More...

std::vector< GModelPar * >	m_pars
	Pointers to all model parameters. More...

GModelAssociations	m_associations
	Model associations. More...

bool	m_has_ts
	Signals if TS is available. More...

bool	m_has_tscalc
	Signals if tscalc attribute is available. More...

bool	m_tscalc
	Signals if TS should be computed. More...

double	m_ts
	Test Statistic of the model. More...

bool	m_has_eval_inx

std::vector< int >	m_eval_inx

Detailed Description

CTA IRF background model class.

Definition at line 47 of file GCTAModelIrfBackground.hpp.

Constructor & Destructor Documentation

GCTAModelIrfBackground::GCTAModelIrfBackground ( void )

Void constructor.

Definition at line 80 of file GCTAModelIrfBackground.cpp.

References init_members().

Referenced by clone().

GCTAModelIrfBackground::GCTAModelIrfBackground ( const GXmlElement & xml )

explicit

Constructor.

Parameters

[in] xml XML element.

Constructs a CTA instrumental background model from the information provided by an XML element. The XML element is expected to have the following structure

<source name="..." type="..." instrument="...">
  <spectrum type="...">
    ...
  </spectrum>
</source>

Optionally, a temporal model may be provided using the following syntax

<source name="..." type="..." instrument="...">
  <spectrum type="...">
    ...
  </spectrum>
  <temporalModel type="...">
    ...
  </temporalModel>
</source>

If no temporal component is found a constant model is assumed.

Definition at line 119 of file GCTAModelIrfBackground.cpp.

References init_members(), read(), and set_pointers().

GCTAModelIrfBackground::GCTAModelIrfBackground ( const GModelSpectral & spectral )

explicit

Construct from spectral component.

Parameters

[in] spectral Spectral model component.

Constructs a CTA instrumental background model from a spectral model component. The temporal component is assumed to be constant. Please refer to the classe GModelSpectral to learn more about the definition of the spectral components.

Definition at line 146 of file GCTAModelIrfBackground.cpp.

References GModelTemporalConst::clone(), GModelSpectral::clone(), init_members(), m_spectral, m_temporal, set_pointers(), and temporal().

GCTAModelIrfBackground::GCTAModelIrfBackground ( const GCTAModelIrfBackground & bgd )

Copy constructor.

Parameters

[in] bgd CTA instrument background model.

Definition at line 172 of file GCTAModelIrfBackground.cpp.

References copy_members(), and init_members().

GCTAModelIrfBackground::~GCTAModelIrfBackground ( void )

virtual

Destructor.

Definition at line 189 of file GCTAModelIrfBackground.cpp.

References free_members().

Member Function Documentation

std::string GCTAModelIrfBackground::classname ( void ) const

inlinevirtual

Return class name.

Returns: String containing the class name ("GCTAModelIrfBackground").

Implements GModelData.

Definition at line 149 of file GCTAModelIrfBackground.hpp.

void GCTAModelIrfBackground::clear ( void )

virtual

Clear CTA instrument background model.

This method properly resets the CTA instrument background model to an initial state.

Implements GModelData.

Definition at line 247 of file GCTAModelIrfBackground.cpp.

References free_members(), GModelData::free_members(), init_members(), and GModelData::init_members().

Referenced by read().

GCTAModelIrfBackground * GCTAModelIrfBackground::clone ( void ) const

virtual

Clone CTA instrument background model.

Returns: Pointer to deep copy of CTA instrument background model.

Implements GModelData.

Definition at line 267 of file GCTAModelIrfBackground.cpp.

References GCTAModelIrfBackground().

void GCTAModelIrfBackground::copy_members ( const GCTAModelIrfBackground & bgd )

private

Copy class members.

Parameters

[in] bgd CTA background model.

Definition at line 918 of file GCTAModelIrfBackground.cpp.

References GModelTemporal::clone(), GModelSpectral::clone(), m_npred_energies, m_npred_names, m_npred_times, m_npred_values, m_spectral, m_temporal, and set_pointers().

Referenced by GCTAModelIrfBackground(), and operator=().

double GCTAModelIrfBackground::eval	(	const GEvent &	event,
		const GObservation &	obs,
		const bool &	gradients = `false`
	)		const

virtual

Return background rate in units of events MeV \(^{-1}\) s \(^{-1}\) sr \(^{-1}\).

Parameters

[in]	event	Observed event.
[in]	obs	Observation.
[in]	gradients	Compute gradients?

Returns: Background rate (events MeV \(^{-1}\) s \(^{-1}\) sr \(^{-1}\)).

The method returns a real rate, defined by the number of counts per MeV, steradian and ontime.

If the gradients flag is true the method will also set the parameter gradients of the model parameters.

Implements GModelData.

Definition at line 342 of file GCTAModelIrfBackground.cpp.

References gammalib::cta_dir(), gammalib::cta_pnt(), gammalib::cta_rsp_bkg(), GCTAInstDir::detx(), GCTAInstDir::dety(), GCTAInstDir::dir(), GCTAEventBin::emin(), GEvent::energy(), GModelTemporal::eval(), GModelSpectral::eval(), GCTAEventBin::ewidth(), G_EVAL, GCTAPointing::instdir(), GEvent::is_atom(), GEnergy::MeV(), norm(), GCTABackground::rate_ebin(), GModelTemporal::size(), GModelSpectral::size(), spectral(), temporal(), and GEvent::time().

void GCTAModelIrfBackground::free_members ( void )

private

Delete class members.

Definition at line 941 of file GCTAModelIrfBackground.cpp.

References m_spectral, and m_temporal.

Referenced by clear(), operator=(), and ~GCTAModelIrfBackground().

void GCTAModelIrfBackground::init_members ( void )

private

Initialise class members.

Definition at line 896 of file GCTAModelIrfBackground.cpp.

References m_npred_energies, m_npred_names, m_npred_times, m_npred_values, m_spectral, and m_temporal.

Referenced by clear(), GCTAModelIrfBackground(), and operator=().

bool GCTAModelIrfBackground::is_constant ( void ) const

inlinevirtual

Signals if sky model is temporally constant.

Returns: True if sky model is temporally constant, false otherwise.

Signals if the sky model is temporally constant. A temporally constant model is a model that has a temporal component of type "Constant".

Implements GModelData.

Definition at line 178 of file GCTAModelIrfBackground.hpp.

References m_temporal, and GModelTemporal::type().

GCTAEventList * GCTAModelIrfBackground::mc	(	const GObservation &	obs,
		GRan &	ran
	)		const

virtual

Return simulated list of events.

Parameters

[in]	obs	Observation.
[in]	ran	Random number generator.

Returns: Pointer to list of simulated events (needs to be de-allocated by client)

Draws a sample of events from the background model using a Monte Carlo simulation. The region of interest, the energy boundaries and the good time interval for the sampling will be extracted from the observation argument that is passed to the method. The method also requires a random number generator of type GRan which is passed by reference, hence the state of the random number generator will be changed by the method.

For each event in the returned event list, the sky direction, the nominal coordinates (DETX and DETY), the energy and the time will be set.

Implements GModelData.

Definition at line 550 of file GCTAModelIrfBackground.cpp.

References GCTAEventList::append(), gammalib::cta_event_list(), gammalib::cta_pnt(), gammalib::cta_rsp_bkg(), GCTAEventAtom::dir(), GCTAInstDir::dir(), GEvents::ebounds(), GEbounds::emax(), GEbounds::emin(), GModelSpectral::eval(), GModelSpectral::flux(), G_MC, GEvents::gti(), m_spectral, m_temporal, GCTABackground::mc(), GModelTemporal::mc(), GModelSpectral::mc(), GModel::name(), norm(), GCTAEventList::reserve(), GCTAEventList::roi(), GTimes::size(), GGti::size(), GEbounds::size(), GCTAPointing::skydir(), spectral(), GCTABackground::spectrum(), GGti::tstart(), GGti::tstop(), and valid_model().

double GCTAModelIrfBackground::npred	(	const GEnergy &	obsEng,
		const GTime &	obsTime,
		const GObservation &	obs
	)		const

virtual

Return spatially integrated background rate in units of events MeV \(^{-1}\) s \(^{-1}\).

Parameters

[in]	obsEng	Measured event energy.
[in]	obsTime	Measured event time.
[in]	obs	Observation.

Returns: Spatially integrated background rate (events MeV \(^{-1}\) s \(^{-1}\))

Spatially integrates the instrumental background model for a given measured event energy and event time. The method returns a real rate, defined as the number of counts per MeV and ontime.

Implements GModelData.

Definition at line 427 of file GCTAModelIrfBackground.cpp.

References gammalib::cta_event_list(), gammalib::cta_pnt(), gammalib::cta_rsp_bkg(), gammalib::deg2rad, GModelTemporal::eval(), GModelSpectral::eval(), GIntegral::fixed_iter(), G_NPRED, GObservation::id(), GCTAPointing::instdir(), GObservation::instrument(), gammalib::is_infinite(), gammalib::is_notanumber(), gammalib::iter_phi(), GEnergy::log10TeV(), m_npred_energies, m_npred_names, m_npred_times, m_npred_values, GCTAEventList::roi(), GIntegral::romberg(), spectral(), gammalib::str(), temporal(), valid_model(), and gammalib::warning().

GCTAModelIrfBackground & GCTAModelIrfBackground::operator= ( const GCTAModelIrfBackground & bgd )

Assignment operator.

Parameters

[in] bgd CTA instrument background model.

Returns: CTA instrument background model.

Definition at line 211 of file GCTAModelIrfBackground.cpp.

References copy_members(), free_members(), init_members(), and GModelData::operator=().

std::string GCTAModelIrfBackground::print ( const GChatter & chatter = NORMAL ) const

virtual

Print CTA instrument background model information.

Parameters

[in] chatter Chattiness.

Returns: String containing CTA instrument background model information.

Implements GModelData.

Definition at line 836 of file GCTAModelIrfBackground.cpp.

References gammalib::parformat(), GModel::print_attributes(), SILENT, GModelTemporal::size(), GModelSpectral::size(), GModel::size(), spectral(), gammalib::str(), temporal(), and type().

void GCTAModelIrfBackground::read ( const GXmlElement & xml )

virtual

Read CTA instrument background model from XML element.

Parameters

[in] xml XML element.

Set up CTA instrument background model from the information provided by an XML element. The XML element is expected to have the following structure

<source name="..." type="..." instrument="...">
  <spectrum type="...">
    ...
  </spectrum>
</source>

Optionally, a temporal model may be provided using the following syntax

<source name="..." type="..." instrument="...">
  <spectrum type="...">
    ...
  </spectrum>
  <temporal type="...">
    ...
  </temporal>
</source>

If no temporal component is found a constant model is assumed.

Implements GModelData.

Definition at line 714 of file GCTAModelIrfBackground.cpp.

References clear(), GModelTemporalConst::clone(), GXmlNode::element(), GXmlNode::elements(), m_spectral, m_temporal, GModel::read_attributes(), set_pointers(), spectral(), temporal(), xml_spectral(), and xml_temporal().

Referenced by GCTAModelIrfBackground().

void GCTAModelIrfBackground::set_pointers ( void )

private

Set pointers.

Set pointers to all model parameters. The pointers are stored in a vector that is member of the GModelData base class.

Definition at line 962 of file GCTAModelIrfBackground.cpp.

References GModel::m_pars, GModelTemporal::size(), GModelSpectral::size(), spectral(), and temporal().

Referenced by copy_members(), GCTAModelIrfBackground(), read(), spectral(), and temporal().

GModelSpectral * GCTAModelIrfBackground::spectral ( void ) const

inline

Return spectral model component.

Returns: Pointer to spectral model component.

Returns a pointer to the spectral model component of the model. The pointer is of type GModelSpectral. Note that a NULL pointer may be returned if the sky model has no spectral model component.

Definition at line 194 of file GCTAModelIrfBackground.hpp.

References m_spectral.

Referenced by gammalib::cta_model_spectral(), eval(), mc(), npred(), print(), read(), set_pointers(), valid_model(), and write().

void GCTAModelIrfBackground::spectral ( const GModelSpectral * spectral )

Set spectral model component.

Parameters

[in] spectral Pointer to spectral model component.

Sets the spectral model component of the model.

Definition at line 280 of file GCTAModelIrfBackground.cpp.

References GModelSpectral::clone(), m_spectral, and set_pointers().

GModelTemporal * GCTAModelIrfBackground::temporal ( void ) const

inline

Return temporal model component.

Returns: Pointer to temporal model component.

Returns a pointer to the temporal model component of the model. The pointer is of type GModelTemporal. Note that a NULL pointer may be returned if the sky model has no temporal model component.

Definition at line 210 of file GCTAModelIrfBackground.hpp.

References m_temporal.

Referenced by gammalib::cta_model_temporal(), eval(), GCTAModelIrfBackground(), npred(), print(), read(), set_pointers(), valid_model(), and write().

void GCTAModelIrfBackground::temporal ( const GModelTemporal * temporal )

Set temporal model component.

Parameters

[in] temporal Pointer to temporal model component.

Sets the temporal model component of the model.

Definition at line 307 of file GCTAModelIrfBackground.cpp.

References GModelTemporal::clone(), m_temporal, and set_pointers().

std::string GCTAModelIrfBackground::type ( void ) const

inlinevirtual

Return data model type.

Returns: Data model type.

Returns the type of the data model.

Implements GModelData.

Definition at line 163 of file GCTAModelIrfBackground.hpp.

Referenced by print().

bool GCTAModelIrfBackground::valid_model ( void ) const

private

Verifies if model has all components.

Returns 'true' if models has a spectral and a temporal component. Otherwise returns 'false'.

Definition at line 998 of file GCTAModelIrfBackground.cpp.

References spectral(), and temporal().

Referenced by mc(), and npred().

void GCTAModelIrfBackground::write ( GXmlElement & xml ) const

virtual

Write CTA instrument background model into XML element.

Parameters

[in] xml XML element.

Write CTA instrument background model information into an XML element. The XML element will have the following structure

<source name="..." type="..." instrument="...">
  <spectrum type="...">
    ...
  </spectrum>
</source>

If the model contains a non-constant temporal model, the temporal component will also be written following the syntax

<source name="..." type="..." instrument="...">
  <spectrum type="...">
    ...
  </spectrum>
  <temporal type="...">
    ...
  </temporal>
</source>

If no temporal component is found a constant model is assumed.

Implements GModelData.

Definition at line 777 of file GCTAModelIrfBackground.cpp.

References GXmlNode::append(), GXmlElement::attribute(), GXmlNode::element(), GXmlNode::elements(), m_temporal, GModel::name(), spectral(), temporal(), GModelTemporal::type(), GModelTemporal::write(), GModelSpectral::write(), and GModel::write_attributes().

GModelSpectral * GCTAModelIrfBackground::xml_spectral ( const GXmlElement & spectral ) const

private

Return pointer to spectral model from XML element.

Parameters

[in] spectral XML element.

Returns: Pointer to spectral model.

Returns pointer to spectral model that is defined in an XML element.

Definition at line 1016 of file GCTAModelIrfBackground.cpp.

References GModelSpectralRegistry::alloc().

Referenced by read().

GModelTemporal * GCTAModelIrfBackground::xml_temporal ( const GXmlElement & temporal ) const

private

Return pointer to temporal model from XML element.

Parameters

[in] temporal XML element.

Returns: Pointer to temporal model.

Returns pointer to temporal model that is defined in an XML element.

Definition at line 1035 of file GCTAModelIrfBackground.cpp.

References GModelTemporalRegistry::alloc().

Referenced by read().

Member Data Documentation

std::vector<GEnergy> GCTAModelIrfBackground::m_npred_energies

mutableprivate

Model energy.

Definition at line 137 of file GCTAModelIrfBackground.hpp.

Referenced by copy_members(), init_members(), and npred().

std::vector<std::string> GCTAModelIrfBackground::m_npred_names

mutableprivate

Model names.

Definition at line 136 of file GCTAModelIrfBackground.hpp.

Referenced by copy_members(), init_members(), and npred().

std::vector<GTime> GCTAModelIrfBackground::m_npred_times

mutableprivate

Model time.

Definition at line 138 of file GCTAModelIrfBackground.hpp.

Referenced by copy_members(), init_members(), and npred().

std::vector<double> GCTAModelIrfBackground::m_npred_values

mutableprivate

Model values.

Definition at line 139 of file GCTAModelIrfBackground.hpp.

Referenced by copy_members(), init_members(), and npred().

GModelSpectral* GCTAModelIrfBackground::m_spectral

private

Spectral model.

Definition at line 132 of file GCTAModelIrfBackground.hpp.

Referenced by copy_members(), free_members(), GCTAModelIrfBackground(), init_members(), mc(), read(), and spectral().

GModelTemporal* GCTAModelIrfBackground::m_temporal

private

Temporal model.

Definition at line 133 of file GCTAModelIrfBackground.hpp.

Referenced by copy_members(), free_members(), GCTAModelIrfBackground(), init_members(), is_constant(), mc(), read(), temporal(), and write().

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

inst/cta/include/GCTAModelIrfBackground.hpp
inst/cta/src/GCTAModelIrfBackground.cpp

Classes

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation