7 Error estimate

The uncertainties reported in Tables 7, 8 and 9 regarding the different flux estimates have been derived as follows:

$$\sigma_{f_{{\rm H}_{\alpha}}}= \sqrt{\left(\frac{\partial f... ...rtial\alpha_{\rm G}} \cdot \sigma_{\alpha_{\rm G}} \right)^2 }$$ (15)

where:

$$\begin{array} {lp{0.6\linewidth}} C_{{\rm H}\alpha}=C_{\rm o... ...he propagation error formula to $\alpha_{\rm G}$.\\ \end{array}$$

The errors regarding the H$_\alpha$ luminosity (Tables 7 and 9) have been calculated by applying the error propagation formula.