In this document we will describe all use cases of the VBBinaryLensing library and provide ready-to-use examples that you can copy/paste to your code.
In a typical C++ code, you will include the VBBinaryLensingLibrary.h in your project.
An instance to the VBBinaryLensing class should be declared in your program. The VBBinaryLensing class contains all the properties and methods that the user needs to call for any microlensing computations. Here is a basic start up example:
#include <stdio.h>
#include "VBBinaryLensingLibrary.h"
int main()
{
// Declaration of an instance to VBBinaryLensing class.
VBBinaryLensing VBBL;
double Mag, s, q, y1, y2, Rs;
s = 0.8; //separation between the two lenses
q = 0.1; // mass ratio: mass of the lens on the right divided by mass of the lens on the left
// Position of the center of the source with respect to the center of mass.
y1 = 0.01; // y1 is the source coordinate along the axis parallel to the line joining the two lenses
y2 = 0.01; // y2 is the source coordinate orthogonal to the first one
Rs = 0.01; // Source radius in Einstein radii of the total mass.
Mag = VBBL.BinaryMag2(s, q, y1, y2, Rs); // Call to the BinaryMag2 function with these parameters
printf("Binary lens Magnification = %lf\n", Mag); // Output should be 18.28....
return 0;
}
In this example we have declared an instance to the VBBinaryLensing class, assigned values to some parameters and then we have called VBBL.BinaryMag2 to perform a computation of magnification by a binary lens with these parameters.
In the following pages, we will describe all functionalities of VBBinaryLensing in detail.