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Fig. 1


Rest frame ultraviolet wavelengths sampled with our dataset as a function of redshift. The solid curves correspond to broad band filters (from bottom left corner to top right corner: U, U38, B, V, R, I and z) and the dashed curves to intermediate-band filters (from bottom left corner to top right corner: IA-427, 445, 484, 505, 527, 550, 574, 598, 624, 651 (coincident with the red solid curve for the R-band), 679 and 738. The FWHM of the intermediate filters varies from 20 to 34 nm. The horizontal dotted line corresponds to 2175 Å, the central wavelength of the expected bump.

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