Examples of UV spectral slope (β) fitting on the VUDS spectra (shown in gray). The spectra between rest-frame 1400 Å to 2400 Å (between dashed vertical lines) are fitted with a linear relation (solid red lines) between Log(λ) vs. Log(F_λ) after masking out known lines and removing spurious noise spikes. The dashed red lines are 1σ deviations in the best-fit relation. The blue filled circles are the photometric magnitudes from the broad-band filters (gray curves) used to measure the photometric β, while the blue dashed line is a linear fit between these photometric data points to estimate the photometric UV slope.