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Mark III Photoelectric Photometer to Retire (1Dec94) (from KPNO, NOAO Newsletter No. 40, 1 December 1994) A second instrument to be retired in the fall 1995, semester is the Mark III photometer, used at the 1.3-m. This retirement is forced by the closing of the telescope, described above. The capability for all-sky and differential photometry has been shifted to the 0.9-m telescope with the new CCDPHOT photometer. CCDPHOT has proven capable of providing quantitative photometry for most scientific programs, except in the U band, where the rapid decline in sensitivity of the CCD makes the transformation difficult. We are hoping to provide a different CCD with better ultraviolet sensitivity (TI5) to overcome this problem. As with the 4-m prime focus camera, we are willing to entertain proposals from the community for a long term loan of the Mark III photometer. Priority will be given to applications that provide community access in some form. If you are interested in proposing to obtain this equipment, please contact me for details. Caty Pilachowski
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