Compare the observed light curve of the microlensing event OGLE-2003-BLG-175 from
the photometry data file "phot.dat" (which 3 columns are: JD, I-band magnitude and
magnitude error) with the corresponding theoretical light curve. Use the best fit
values of parameters from the file "params.dat" to calculate the theoretical
amplification and magnitude light curves, knowing that I-band magnitude is given by:
I = Ibl - 2.5 * log(fbl * A + 1 - fbl), where Ibl is total base I-band magnitude,
fbl is blending ratio and A is microlensing amplification.