Detector Systems for the MODS Spectrograph

The detector plan for the four cameras on the work-horse spectrograph of the world’s largest optical telescope, the Large Binocular Telescope, is presented. The two cameras of MODS 1 will be outfitted for initial deployment in November, 2006 with 4K×4K detectors processed by the University of Arizona Imaging Technology Laboratory. A custom run of 8192×2880 detectors is in preparation. These larger detectors will be used for MODS 2 and retrofits to MODS 1. The dewar and electronics design are outlined. Projections of the limiting magnitude for the completed spectrograph at S/N=5 and 10 are given.