LARGE MONOLITHIC IMAGER (LMI) ============================= Instrument Overview =================== The visible-wavelength, direct-imaging CCD for the Lowell Discovery Telescope (LDT) is called the Large Monolithic Imager (LMI). LMI is a deep depletion, monolithic CCD with 6144 x 6160 pixels. The instrument was funded by the National Science Foundation through AST-1005313. The camera is mounted in the direct through-put port on the LDT instrument cube. Detector ======== LMI is a 6k x 6k CCD that images a 12.3 arc minute square field of view. The device is back illuminated and has 15-micron pixels. The unbinned detector provides a pixel scale of 0.12 arcsec/pixel. The chip is commonly binned at 2x2 (0.24 arcsec/pixel) or 3x3 (0.36 arcsec/pixel). The chip is linear up to 65k ADU at the default gain of 2.89 e-/ADU. Read noise is 2.1 ADU per pixel and the readout time is 73 seconds for unbinned images, 24 seconds for 2x2 binning, and 10 sec for 3x3 binning. The CCD quantum efficiency is 80% from 400-700 nm, and dropping to ~50% at 350 and 900 nm. Filters ======= Dual filter wheels in the LDT instrument cube provide 18 filter slots. A wide range of facility filters are available including Johnson-Cousins UBVRI, SDSS u'g'r'i'z', a variety of comet filters (OH, NH, CN, C3 CO+, C2, H2O), and a broad VR filter that provides >80% transmission from 500-700 nm.