Near-Infrared Images of Comet 9P/Tempel 1

Status: Archived

This volume contains raw and reduced near-infrared images of comet 9P/Tempel 1, the target of the Deep Impact mission, as well as a table and plot of the H, J, and K magnitudes of Tempel 1. Images were obtained from UT July 2-9, 2005 by M. Knight, R. Swaters, and N. Samarasinha using the Simultaneous Quad Infrared Imaging Device (SQIID) 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).

The entire data set is about 5 GB in size. The data have been divided into two volumes, one for the raw data and one for the reduced data, to facilitate bulk downloading. Individual files can be browsed through the links below.

• Catalog, document, index, and supporting files (6 MB zip file)
• Raw data (2.9 GB ISO image file)
• Reduced data (1.8 GB ISO image file)

MD5 checksums for the above files

In case you're wondering... How to download large files What to do with an ISO file What to do with a checksum

An overview of the volume contents is provided in the aareadme.txt file.

Catalog Files

Catalog files contain the overview information and parameters used in loading the PDS central catalog, specifically, or for developing other interfaces to the data outside of PDS. The information they contain, particularly in their descriptive text fields, should be clear, complete, and understandable to a research user who is not necessarily a mission or instrument specialist.

These files are located in the catalog/ subdirectory. The directory contents are described by the catinfo.txt file.

• Support Archives mission file
• Deep Impact mission file
• KPNO 2.1M Telescope instrument host file
• SQIID instrument file
• Data Set file
• 9P/Tempel 1 target file
• Calibration target file
• Sky target file
• References file

Documentation Files

In addition to the small text files located throughout the volume to describe directory contents, some specific documents are provided to assist with understanding the data and processing involved. These files are located in the document/ subdirectory. The directory contents are described by the docinfo.txt file.

Additional explanatory material about the observations has been provided in several separate documents:

• The table comet_pos.txt provides comet location as pixel coordinates for each image in the collection (PDS label).
• The table kpno_magnitudes.tab provides IR photometric information for Tempel 1 on Jul 2-9, 2005 in the H, J, and K bands (PDS label).
• The photometry data is plotted in kpno_photometry.pdf and kpno_photometry.png (PDS label).
• The observing log is reproduced as obs_log.txt (PDS label).
• The PDF file sqiidmanual.pdf contains the SQIID instrument user's manual, reproduced here with the kind permission of the KPNO staff and included for the convenience of users (PDS label).
• Similarly, sqiidsuppl.pdf contains the "SQIID Users' Manual Supplement" (PDS label).
• The upsqiid_software/ directory contains the IRAF UPSQUIID package for reducing SQIID data. This is also supplied with the kind permission of the KPNO staff for the convenience of users (PDS label), and comes with upsqiidpkg.txt, the "UPSQIID Reduction Manual" (PDS label).

In addition, in this directory you will also find ads.txt and its label, which contains information for the ADS Abstract Service databasw.

Data Files

The data are divided into two subdirectories, which are each further divided by sequential night.

• Raw Data files
• Reduced Images

All data files are presented as FITS files with detached PDS labels.

Index Files

The index directory contains the required PDS index into the files in the data directory, as well as the checksum file.

• indxinfo.txt describes the directory contents.
• index.tab is a CSV table meeting the PDS indexing requirements. (PDS label)
• checksum.tab is flat table of MD5 checksums for each file in the official archive volume except for itself and its PDS label.