I/F values Wavelength(nm) Observed Model 250.0 0.314±0.031 0.323 275.0 0.283±0.028 0.282 395.0 0.456±0.046 0.444 501.3 0.68±0.068 0.637 630.6 0.654±0.065 0.652 727.0 0.305±0.031 0.333 889.0 0.065±0.01 0.062 chi2 values Wavelength(nm) chi2 250.0 0.08 275.0 0.001 395.0 0.069 501.3 0.4 630.6 0.001 727.0 0.816 889.0 0.118