Ultraviolet and Visible Observations of Comet C/1995 O1 Hale-Bopp from the SWUIS Imager Aboard the Space Shuttle

Details Ultraviolet and Visible Observations of Comet C/1995 O1 Hale-Bopp from the SWUIS Imager Aboard the Space Shuttle Ultraviolet and Visible Observations of Comet C/1995 O1 Hale-Bopp from the SWUIS Imager Aboard the Space Shuttle

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998baas...30.1073c&link_type=abstract

American Astronomical Society, DPS meeting #30, #31.P16; Bulletin of the American Astronomical Society, Vol. 30, p.1073

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In August 1997 we flew the Southwest Ultraviolet Imaging System (SWUIS) aboard the Space Shuttle (STS-85) to observe comet C/1995 O1 (Hale-Bopp) in a variety of visible and ultraviolet bandpasses (http://www.boulder.swri.edu/swuis/). SWUIS is a versatile low-cost UV/Visible imaging instrument designed to observe comets, planetary atmospheres, and objects of astrophysical interest through the UV transmissive window on the Shuttle cabin mid-deck. SWUIS consists of an 18 cm aperature Maksutov-Cassegrain telescope, and a Xybion image-intensified CCD camera sensitive from 2200 Angstroms to 8500 Angstroms . The telescope focal length can be varied between 105 and 257 cm for a field of view range of 0.2(deg) to 0.6(deg) full cone. The 30 Hz frame rate provides high temporal resolution and stabilization against Shuttle jitter. The STS-85 SWUIS observations of C/Hale-Bopp occurred during the period 9-14 August 1997 when the comet was at a heliocentric distance of 2.3 A.U. when HST observations were not possible (they resumed in September 1997). The SWUIS dataset is the first high resolution UV time-lapse imagery of a comet, providing an opportunity to examine C/Hale-Bopp for morphological changes on time scales of minutes, hours, and days (six consecutive days of observations). These are the only wide field UV images of C/Hale-Bopp. We have co-added the >430,000 C/Hale-Bopp images (nine hours of data taken during nine orbits) to produce a dataset of half-minute exposure images. Calibration was performed using field stars. We present our data for five bandpasses: broadband continuum, C_2, CN, OH, and broadband UV continuum; and discuss our preliminary results on the comet morphology and H_2O production rates.

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