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FIRST ULTRAVIOLET REFLECTANCE SPECTRA OF PLUTO AND CHARON BY THEHUBBLE SPACE TELESCOPECOSMIC ORIGINS SPECTROGRAPH: DETECTION OF ABSORPTION FEATURES AND EVIDENCE FOR TEMPORAL CHANGE
We have observed the mid-UV spectra of both Pluto and its large satellite, Charon, at two rotational epochs using the Hubble Space Telescope (HST) Cosmic Origins Spectrograph (COS) in 2010. These are the first HST/COS measurements of Pluto and Charon. Here we describe the observations and our reduction of them, and present the albedo spectra, average mid-UV albedos, and albedo slopes we derive from these data. These data reveal evidence for a strong absorption feature in the mid-UV spectrum ofdoi:10.1088/0004-6256/143/1/22 fatcat:xdvv7pxawvazjkptd3qrbiwvqy