ROSAT Guest Observer Facility

How does one put a contour of a second image on top of the displayed image?


Use XRAY.XPLOT.xdisplay (or IMAGES.TV.display) with fill = yes to display the image. Use PLOT.contour on the second image (the one to be overlayed), again with fill = yes. The contour plot will appear on top of the image if the 'device' parameter is set to imdx, with x = g (for Green), r (for Red), b (Blue), y (Yellow), or W (white). The 'fill' parameter is necessary to prevent display / graph borders from affecting the size of the result.

Use with caution, in case the images you are overlaying are not co-centered (use imshift to recenter).

button Select another question related to data analysis

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 14:59:31 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.