Near-infrared (0.85-1 micron) study of Titan's resolved disk in spectro-imaging with CFHT/OASIS and the adaptive optics system PUEO.

Details Near-infrared (0.85-1 micron) study of Titan's resolved disk in spectro-imaging with CFHT/OASIS and the adaptive optics system PUEO. Near-infrared (0.85-1 micron) study of Titan's resolved disk in spectro-imaging with CFHT/OASIS and the adaptive optics system PUEO.

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....6233h&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #6233

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Scientific paper

We observed Titan with OASIS/PUEO (Optically Adaptive System for Imaging Spectroscopy) at the CFHT on November 17, 2000. We covered the spectral region from 0.865 to 1.037 micron with R=1000. The images of Titan thus acquired - in 1 hour of integration time - bear a S/N of about 20, for a pixel size of 0.04 arcsec. After reducing and processing the data (with XOasis) we recovered several independent spectra at different locations of Titan's disk. In this spectral range we can investigate, among other, the 0.83 and 0.94 CH4 windows, which provide crucial information on the satellite's surface. The adjacent methane bands give access to the atmospheric properties. We present our data and their analysis, which involves modeling the atmospheric component and estimating the albedo for each resolved spot on Titan (which we try to enhance by applying deconvolution methods in order to increase the number of individual elements of resolution on the disk), while comparing the surface observations in the windows with laboratory spectra of various ices and tholin material absorbing in the 0.9-1.1 micron range.

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