Images of comet 19P/Borrelly obtained at the McDonald Observatory with the Imaging Grism Instrument on five observing runs during the 2001 apparition

The data set consists of ground-based images of comet 19P/Borrelly in the R filter taken at the Kitt Peak 2.1m for three nights from September 21-23, 2001, bracketing the Deep Space 1 encounter. Raw, as well as reduced images are included.

The data set consists of ground-based images of comet 19P/Borrelly in the R filter taken at the Kitt Peak 2.1m for three nights from September 21-23, 2001, bracketing the Deep Space 1 encounter. Raw, as well as reduced images are included.

This data set presents images and photometry of comet 19P/Borrelly 1 obtained by Karen Meech over 20 nights during the period 1987-08-21 to 2002-02-03. These data were not of sufficient quality to be reviewed or formally ingested.

This data set presents images and photometry of comet 19P/Borrelly 1 obtained by Karen Meech over 20 nights during the period 1987-08-21 to 2002-02-03. These data were not of sufficient quality to be reviewed or formally ingested.

This dataset contains raw and reduced near-infrared images of comet 9P/Tempel 1, the target of the Deep Impact mission. Images were obtained from UT July 2-9, 2005 by M. Knight, R. Swaters, and N. Samarasinha using the Simultaneous Quad Infrared Imaging Device at the KPNO 2.1-m telescope. Results are published in the paper 'Ground-based visible and near-IR observations of Comet 9P/Tempel 1 during the Deep Impact encounter' by Knight et al. 2007 [KNIGHTETAL2007].

This dataset contains raw and reduced near-infrared images of comet 9P/Tempel 1, the target of the Deep Impact mission. Images were obtained from UT July 2-9, 2005 by M. Knight, R. Swaters, and N. Samarasinha using the Simultaneous Quad Infrared Imaging Device at the KPNO 2.1-m telescope. Results are published in the paper 'Ground-based visible and near-IR observations of Comet 9P/Tempel 1 during the Deep Impact encounter' by Knight et al. 2007 [KNIGHTETAL2007].

We report on low-spectral resolution observations of comet 9P/Tempel 1 from 1983, 1989, 1994 and 2005 using the 2.7m Harlan J. Smith telescope of McDonald Observatory. This comet was the target of NASA's Deep Impact mission and our observations allowed us to characterize the comet prior to the impact. In the published paper, we showed that the comet decreased in gas production from 1983 to 2005, with the decrease being different factors for different species. OH decreased by a factor 2.7, NH by 1.7, CN by 1.6, C3 by 1.8, CH by 1.4 and C2 by 1.3. Despite the decrease in overall gas production and these slightly different decrease factors, we found that the ratios of the gas production rates of OH, NH, C3, CH and C2 that of CN were constant over all of the apparitions. We saw no change in the production rate ratios after the impact. We found that the peak gas production occurred about two months prior to perihelion. This data set represents the integrated fluxes and column densities, mentioned in the published paper, which were used to derive the production rates in the paper.

We report on low-spectral resolution observations of comet 9P/Tempel 1 from 1983, 1989, 1994 and 2005 using the 2.7m Harlan J. Smith telescope of McDonald Observatory. This comet was the target of NASA's Deep Impact mission and our observations allowed us to characterize the comet prior to the impact. In the published paper, we showed that the comet decreased in gas production from 1983 to 2005, with the decrease being different factors for different species. OH decreased by a factor 2.7, NH by 1.7, CN by 1.6, C3 by 1.8, CH by 1.4 and C2 by 1.3. Despite the decrease in overall gas production and these slightly different decrease factors, we found that the ratios of the gas production rates of OH, NH, C3, CH and C2 that of CN were constant over all of the apparitions. We saw no change in the production rate ratios after the impact. We found that the peak gas production occurred about two months prior to perihelion. This data set represents the integrated fluxes and column densities, mentioned in the published paper, which were used to derive the production rates in the paper.

Near-IR spectra of Comet 9P/Tempel 1 were obtained with SpeX at the NASA IRTF during the period from June 24 through July 08, 2005 UT. These observations were taken as part of a campaign designed to support the science objectives of the Deep Impact spacecraft around the time of its encounter with Tempel 1 on July 4, 2005.