Filter transmission curve for different popular U-band filters in the literature. The U-Johnson (dashed blue), used in VIPERS, is compared to the UBessel VVDS filter (red solid), U3 Buser filter (green), UBessel1990 (dotted cyan), u SDSS (black), u∗ CFHT MegaCam (pink), and the u⋆ CFHT MegaCam SAGEM filter (dot-dashed magenta line).
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