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Registered FITS Convention
Hierarchical Grouping Convention
- Description: This grouping convention provides a general mechanism for defining hierarchical associations of HDUs. The group members may reside in a single FITS file or be distributed in many files which may reside on different computer systems. The convention uses a FITS table to record all the members of the group (one member per row of the table).
- Submitted: April 2007 by W. Pence (NASA/GSFC)
- Registered: June 2007
- Date and Place of First Usage: 1998, at the INTEGRAL Science Data Center (ISDC), Geneva, Switzerland.
- Extent of Usage: It is used in science data products from the INTEGRAL gamma-ray mission that was launched in October 2002. Each observation can consist of hundreds of individual FITS files representing each of the 'dithered' exposures. The grouping tables are used to form associations of related observation FITS files and the calibration data files.
The fv FITS file viewer provides a convenient way to navigate through this hierarchial structure (via the "open" button display at the beginning of each row of the grouping table).
- Full Documentation: PDF format, Postscript format
- Digest of Public Comments about this convention.
- Sample FITS File:
- grouping.tar example .tar file from the INTEGRAL gamma ray satellite project contains a hierachical group of files. The file "swg1.fits" contains the actual grouping table. The fv FITS file viewer (available from the HEASARC) provides a convenient way to navigate through this hierarchial structure (via the "open" button
- Sample Header Listing:
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Last revised: Wednesday, 13-Jun-2007 15:51:20 EDT
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