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GRBurst Class Reference

This class serves as a base class for GbmGrb and LatGrb classes. More...

#include <GRBurst.h>

Inheritance diagram for GRBurst::

List of all members.

Public Methods
	GRBurst ()
	Constructor.
	GRBurst (const std::vector< std::string > &paramVector)
	Constructor.
	GRBurst (HepRandomEngine *engine, const double duration, const int npuls, const double flux, const double fraction, const double alpha, const double beta, const double epeak, const double specnorm, const bool flag)
	Constructor.
virtual	~GRBurst ()
	Destructor.
	GRBurst (const GRBurst &right)
	Copy Constructor.
GRBurst &	operator= (const GRBurst &right)
	Assignment Operator.
std::pair< float, float >	dir () const
double	univFWHM () const
const std::vector< double > &	specnorm () const
long	nphoton () const
const std::vector< TimeEnergy > &	photonlist () const
GlobalData *	globalData () const
void	setSpecnorm (const std::vector< double > &specnorm)
void	createGRB (HepRandomEngine *engine, const std::string &prefix, const std::string &dir=0)
	Create "n" GRBs where "n" is specified in GRBobsConstants.h file. More...
void	createGRB (HepRandomEngine *engine, const double duration, const int npuls, const double flux, const double fraction, const double alpha, const double beta, const double epeak, const double specnorm, const bool flag)
	Create burst for specified input parameters.
Protected Methods
std::vector< TimeEnergy > &	photonlist ()
	Pointer to burst specific data (duration, flux etc.).
virtual long	calcNphoton (HepRandomEngine *engine)
	Calculate number of photons to be generated by the burst.
void	makeTimes (HepRandomEngine *engine, const double ethres)
	Make BATSE-like burst time profiles, placing GLAST photons a la cumulative BATSE intensity, but in narrower pulses. More...
Protected Attributes
std::pair< float, float >	m_grbdir
double	m_univFWHM
	Direction of the burst.
std::vector< double >	m_specnorm
	Universal width for the pulses within the current burst.
long	m_nphoton
	Spectral normalization.
std::vector< TimeEnergy >	m_photonlist
	Number of photons generated by a burst.
GlobalData *	m_globalData
	Burst data ((time,energy) pair for each photon.
Friends
class	GRBobsSpectrum
std::ifstream &	operator>> (std::ifstream &is, GRBurst &grb)

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Detailed Description

This class serves as a base class for GbmGrb and LatGrb classes.

Author:

Jay Norris jnorris@lheapop.gsfc.nasa.gov , Sandhia Bansal sandhiab@lheapop.gsfc.nasa.gov

This class implements methods to create GRBs.

If the user specified burst parameters (duration, number of pulses, flux, fraction, broken power law indices, and peak energy), it creates the burst for specified parameters.

If the class was instantiated with no parameters or only a directory name, it creates n GRBs where n is specified in the GRBobsConstants.h file.

If a directory name is specified, the GRBs are written to files in that directory; otherwise, they are written to files in the current working directory.

The user can also specify names of directory and file containing burst data in which case, it simply reads the data from the file to make it available for the simulation.

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Member Function Documentation

void GRBurst::createGRB (  HepRandomEngine *    engine, const std::string &    prefix, const std::string &    dir = 0 )

Create "n" GRBs where "n" is specified in GRBobsConstants.h file. Parameters: prefix  "GBM" or "LAT". dir  Name of directory that the output files are to be written to.

void GRBurst::makeTimes (  HepRandomEngine *    engine, const double    ethres )  [protected]

Make BATSE-like burst time profiles, placing GLAST photons a la cumulative BATSE intensity, but in narrower pulses. (1) m_npuls = number of pulses, proportional to BATSE duration. (2) pulse peak amplitude is random (0.0=>1.0); sort amps in descending amp order. (3) scramble amps of {1st,2nd} halves of pulses, separately (leaves profile assymmetric). (4) center of pulse time is random within duration. sort the times in ascending order. (5) pulse width is drawn from BATSE width distribution for bright bursts (attributes paper), scaled to GLAST energies using width ~E^-0.333. (6) make m_npuls pulses with "bisigma" shapes => sum to produce time profile. (7) form cumulative distribution of BATSE-like intensity. (8) distribute the m_nphoton photons according to cumulative intensity => GRBtimes. (9) offset the photon times according to (a) energy dependence, width ~E^-0.333 and (b) time of peak, also proportional to E^-0.333.

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

• GRBurst.h

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