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GRBengine Class Reference

This class permits to generate different kind of GRBs. More...

#include <GRBengine.h>

List of all members.

Public Methods
	GRBengine (GRBConstants *myParam)
	~GRBengine ()
double	getDurationFromBATSE (char *burst_type="Both")
double	getDuration ()
double	getDistance ()
std::pair< double, double >	getDirection ()
std::vector< GRBShock >	getShocksVector ()

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Detailed Description

This class permits to generate different kind of GRBs.

There are different type of engine:

• Type 0: GRBengine uses some relations between the physical parameters, such as the dimension of the shocked material, and some quantities, such as the duration of a spike, and position of the break energy in the flux. In particular, if and are the rise and the decay time of a single spike, is the thickness of a shell, is the internal energy available in a shock, then the estimated relations are:

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.

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From this equations it is easy to estimate three parameters, living free the fourth ( ).

• Type 1: GRBengine will create a Shocks sequence, according with the physical parameter chosen in the configuration file The file GRBParam.txt , and stored in GRBConstants. GRBengine will read the number of shocks, the duration of the burst, the energy, the Lorentz factor, and the thickness of the shell. Depending on the Shell_type, GRBengine will read the radios of the shell, or the jet angle and the jet radius.

• Type 2: GRBengine will first create two Shells for each shock, retrieving the characteristic parameters of GRBShells from GRBConstants, and then will compute their collisions giving up to the GRBShock sequence.

GRBengine does the following:

• Reads the parameter file.
• Depending on the particular type of engine, fills a shocks vector (that is a vector of GRBShock)
• Sets the distance and the position in the sky of the GRB.

Author:

Nicola Omodei nicola.omodei@pi.infn.it , Johann Cohen-Tanugi johann.cohen@pi.infn.it

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Member Function Documentation

double GRBengine::getDurationFromBATSE (  char *    burst_type = "Both" )

The observed duration from CGRO/BATSE has been fitted with a double power law. This method returns a number chosen from this distribution. Parameters: burst_type  is the type of GRB: "Short" only short bursts are considered, if it is "Long", only long bursts. "Both" means that the two distribution are considered, selecting 30% short bursts and 70% long bursts.

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

• GRBengine.h

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