Image Display

subsection 5.1Summary of Tasks in This Section54 subsection 5.2 SAOimage54 subsection 5.3Imtool [SUN users only]65 subsection 5.4*display, xdisplay, xexamine* -- Image Display67 subsection 5.5Celestial Coordinates from Image Coordinates71 subsection 5.6*tvimcontour* -- Overlay contours and/or source positions on the display74 subsection 5.7*tvmark* -- Mark pixel positions on the display75 subsection 5.8*tvproj* --- one-dimensional projection on display76 subsection 5.9*tabplot* -- Plotting tables, lists or image sections76 subsection 5.10*pspc_hrcolor* -- generate an x-ray color image76

This chapter discusses image display, inspection and manipulation. Images can be displayed from IRAF both within the sunview (with Imtool) and Xwindow (with SAOimage ) environments. Imtool is a standard IRAF tool provided by NOAO, a very brief guide is provided in Imtool. SAOimage is part of the PROS package and will be described in full here.

• Summary of Tasks in This Section
• SAOimage
  • SAOimage for remote users
  • General usage.
  • The SAOimage Menu (options within SAOimage)
  • To produce a region mask using SAOimage interactively.
    • Select a circle around the central point source
    • A box, to include extended emission
    • A Region mask for a radial profile in concentric, elliptical annuli
  • *fixsaoreg* --- restore SAOimage region to original image (physical) coordinates
• Imtool [SUN users only]
• *display, xdisplay, xexamine* -- Image Display
  • A small image (512 X 512) using display
  • To compress and display a large (e.g. ROSAT) image
  • *xdisplay* -- Image Display with scaling appropriate to x-ray images
  • To view a section of the image at full resolution
  • To both compress and view a particular section
  • To display a particular energy band
  • To display a particular time interval
  • To display other sizes
  • *display, xdisplay* --- Displaying an image in detector coordinates
  • *xexamine* --- examine a qp file
• Celestial Coordinates from Image Coordinates
  • *tvlabel, xexamine* --- sky coordinates from a displayed image
  • *skypix* --- conversion of pixel position to sky coordinates
  • *wcscoord* --- all purpose coordinate conversion
  • Image with sky grid overlaid
• *tvimcontour* -- Overlay contours and/or source positions on the display
• *tvmark* -- Mark pixel positions on the display
• *tvproj* --- one-dimensional projection on display
• *tabplot* -- Plotting tables, lists or image sections
• *pspc_hrcolor* -- generate an x-ray color image