  A rapidly convergent series, based on Taylor expansion of the imaginary part
of the complex error function, is presented for highly accurate approximation
of the Voigt/complex error function with small imaginary argument (Y less than
0.1). Error analysis and run-time tests in double-precision computing platform
reveals that in the real and imaginary parts the proposed algorithm provides
average accuracy exceeding 10^-15 and 10^-16, respectively, and the calculation
speed is as fast as that of reported in recent publications. An optimized
MATLAB code providing rapid computation with high accuracy is presented.
