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Recently Referred Formulae

\sigma_{halo}
\sigma_{core}
f_{halo}
f_{psf}=\frac{f_{core}}{2\pi\sigma_{core}^{2}}exp \left [ -\left (\frac{x^2}{2\sigma_{core}^{2}} + \frac{y^2}{2\sigma_{core}^{2}} \right) \right ] + 
\frac{f_{halo}}{2\pi\sigma_{halo}^{2}}exp \left [ -\left (\frac{x^2}{2\sigma_{halo}^{2}} + \frac{y^2}{2\sigma_{halo}^{2}} \right) \right ]
N_{\phi}=\frac{1.41 \times 10^{16} \epsilon_{b} \lambda^{-4}}{e^{14387.7/\lambda T}-1}