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R.J. Hill (Raytheon ITSS/NASA GSFC), A. Waczynski, E.J. Polidan (GST/NASA GSFC), D.J. Krebs (NASA GSFC), M. Robberto (StScI), S.D. Johnson (GST/NASA GSFC)
Wide Field Camera 3 (WFC3) is an instrument being developed for installation aboard the Hubble Space Telescope in 2003. The camera will include both a near-UV/visible and a near-IR channel. The near-IR channel will use a HgCdTe detector custom designed by the Rockwell Science Center to have a long wavelength sensitivity cutoff at ~1.7 microns. We present test results obtained with the pathfinder engineering grade detectors for this program. Of particular importance are the dark current and the position of the long wavelength cutoff, since these are two of the critical detector parameters which will determine the scientific capabilities of the instrument. All of the testing was performed at the Detector Characterization Laboratory (DCL) at Goddard Space Flight Center.