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GAIA/SkyCat   
Description Graphical Astronomy and Image Analysis Tool that provides the usual facilities of image display tools, plus more astronomically useful ones such as aperture & optimal photometry, contouring, source detection, surface photometry, arbitrary region analysis, celestial coordinate readout, calibration and modification, grid overlays, blink comparison, defect patching and the ability to query on-line (WWW) catalogues.
Version installed Fedora-26: 4.4.8 (installed in July 2018; it comes with the Starlink 2018A release).
Usage At the command prompt, type:
gaia
Upgrade Notes Changes and improvements in GAIA v4.4.8 can be found in the 2018A Release Notes.
Manuals and
Documentation
See the on-line help, or the GAIA Cookbook.
SIE contact Nicola Caon - - tel: 5383 - office: 1.124
Additional Info  It seems that GAIA and SkyCat are essentially the same application (more precisely, GAIA is derived from SkyCat).