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ROSAT Guest Observer Facility

What is the conversion from detector coordinates to sky coordinates?

(10/28/91)


To go from detector coordinates to sky coordinates essentially involves a 'flip' in the y-axis, followed by a rotation by the roll angle. Note that this definition differs from that of the HRI. This difference will be a problem only if the user wishes to compare, in detector coordinates, an HRI image with a PSPC image.


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This file was last modified on Friday, 27-Jul-2001 14:59:31 EDT

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