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Composite of Centaurus A consisting of
radio continuum,
21cm HI line emission, and
X-ray images on an
optical background extracted from the
Digitized Sky Survey (DSS).
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Coordinate information stored in varying formats. DSS coordinates
are particularly idiosyncratic (accurate coordinates required for
HST guide star catalogue) - requires special purpose software to
interpret.
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Standardized coordinate representation would facilitate
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Image overlay.
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Determination of accurate (astrometric) coordinates.
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