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Fig. 1


Transmission of LBC filters used in our survey. These curves include the telescope and instrument response but not the atmospheric response, since the data have been obtained during several observing runs with varying weather conditions. For the U and R filters there are two curves that represent the different filters. The blue solid line represents Uspecial and the blue dashed line represents Ubessel. The red solid line represents R-Sloan in the red channel, and the dashed line is the transmission of the R-Sloan filter in the blue channel. There is only one G-Sloan filter on LBC-Blue.

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