Computer Science
Scientific paper
Nov 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jhu..rept.....f&link_type=abstract
Final Report, 1 Jul. 1979 - 30 Sep. 1992 Johns Hopkins Univ., Baltimore, MD.
Computer Science
Brightness, Comets, Emission Spectra, Periodic Variations, Spatial Distribution, Temporal Distribution, Abundance, Carbon Compounds, Hubble Space Telescope, Iue, Space Observations (From Earth)
Scientific paper
Comet Shoemaker-Levey was observed on several dates in June and July 1992. Comparison of the relative brightness of a given emission between IUE and the Hubble Space Telescope (HST) Faint Object Spectrograph apertures provides information about the spatial distribution of the emitting species from which the excitation mechanisms can be inferred. The comparison between the HST and IUE spectra was abetted by the fact that comet Shoemaker-Levy did not show any indication of short-term temporal variability. Comet Swift-Tuttle is a moderately bright periodic comet that shows relatively strong temporal variations on a scale of hours and days. IUE observations of this comet were made in November 1992 and the detected variability was reported on IAU circular 5663. Coordinated ground-based observations led to the first detection of the CI(lambda)9850 transition that complements CI(lambda)1931 observed by the IUE short wavelength spectrograph and provides a means of indirectly determining the CO abundance.
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