ROSAT Guest Observer Facility

What is the conversion from detector coordinates to sky coordinates?


For the HRI, the conversion is essentially a rotation by the roll angle. The pipeline software 'flips' the image about the y-axis twice during processing. Note that this definition differs from that of the PSPC. This difference will be a problem only for those who wish to compare an HRI image, in detector coordinates, with a PSPC image in detector coordinates.

button Select another question related to this topic

Select another FAQ topic Select another FAQ topic Return to the ROSAT GOF Return to the ROSAT GOF

Please use the Feedback link if you have questions on ROSAT.

This file was last modified on Friday, 27-Jul-2001 14:59:29 EDT

NASA Astrophysics

  • FAQ/Comments/Feedback
  • Education Resources
  • Download Adobe Acrobat
  • A service of the Astrophysics Science Division (ASD) at NASA/ GSFC

    ROSAT Project Scientist: Dr. Robert Petre

    Responsible NASA Official: Phil Newman

    Privacy Policy and Important Notices.