DataTypeExampleForm
Description Various astronomical FITS files
Contact David Giaretta
Datatypename Science data
Example http://aparsen.digitalpreservation.eu/bin/view/Main/FitsFilesTestData
Source Various public astronomical sources
Keywords

Preservationissues

Overview

For tools see http://www.fileinfo.com/extension/fits

The NASA tool at http://heasarc.gsfc.nasa.gov/docs/software/ftools/fv/ is useful.
Some specific points about the data files:

  • swp05569slg.fits: IUE image low resolution - note that the second image is the "Quality Flag" images which gives information about the quality (reliability/issues/problems) with individual pixels in the first image
  • orion-16.fits: Simple FITS file - note however that "This image also tests the blank pixel convention. This image contains 144 blank pixels in the centers of the saturated images of the four Trapezium stars". (Blank pixel has value -32768 according to parameter BLANK). Note that there is no World Coordinate System
  • file003.fits: FITS file containing AIPS data. The second component is the "AIPS CC" extension which contains the "AIPS Clean Component" which can be used to remove confusing sources which are buried in the sidelobe structure of the phase calibrator
  • file002.fits: FITS ASCII table.Note that the Primary extension is empty and the table is in the "NoName" extension

Designated Community

Astronomers or people with a graduate level knowledge of astronomy.

Preservation objectives

The DC should be able to extract astronomically useful information from these kinds of images.

Specific issues

The FITS standards are currently readily available, however some of the data uses various dictionaries, and some use non-standard conventions (e.g. use of the blank pixel convention)
Rendered n
Static y
Simple n
Passive y
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Topic revision: r2 - 2012-06-05 - DavidGiaretta
 
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