I/F values Wavelength(nm) Observed Model 250.0 0.379±0.038 0.421 275.0 0.363±0.036 0.357 395.0 0.568±0.057 0.564 501.3 0.806±0.081 0.76 630.6 0.776±0.078 0.762 727.0 0.33±0.033 0.356 889.0 0.051±0.01 0.042 chi2 values Wavelength(nm) chi2 250.0 1.275 275.0 0.022 395.0 0.006 501.3 0.329 630.6 0.035 727.0 0.617 889.0 0.747