EW(Hα) measurement for a NGC863 bin of EW(Hα)≈1 Å using 12 different SSP fittings with the Photometric STARLIGHT code (Werle et al. 2019). Red values correspond to the those obtained from the synthetic spectrum after setting the BC03 base. Idem for the green, using the CB07 base. The x-axis represent the six different photometric constraints; 1) No photometric constraints; 2) GALEX-NUV and GALEX-FUV photometric points added to the fitting; 3) only u-SDSS point added; 4) u-SDSS and GALEX-FUV points added; 5) u-SDSS and GALEX-NUV points added; 6) u-SDSS, GALEX-FUV, and GALEX-NUV points added to the fitting. We can see that the type of fitting affects the EW(Hα) measurement by as much as 80%.