Function gaussian_bandwidth

src/sources.cpp:67–70

bandwidth (in frequency units, not angular frequency) of the continuous Fourier transform of the Gaussian source function when it has decayed by a tolerance tol below its peak value

// continuous Fourier transform of the Gaussian source function
// when it has decayed by a tolerance tol below its peak value
static double gaussian_bandwidth(double width) {
  double tol = 1e-7;
  return sqrt(-2.0 * log(tol)) / (width * pi);
}

gaussian_src_time::gaussian_src_time(double f, double my_fwidth, double s) {
  freq = f;