HEASARC Staff Scientist Position - Applications are now being accepted for a Staff Scientist with significant experience and interest in the technical aspects of astrophysics research, to work in the High Energy Astrophysics Science Archive Research Center (HEASARC) at NASA Goddard Space Flight Center (GSFC) in Greenbelt, MD. Refer to the AAS Job register for full details.

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Ximage
Release Notes Version 4.00
Part of HEAsoft 5.1 - July 26, 2001
* Changes in version 4.00
  • Tcl interface
  • New /xtk device provides GUI facilities
  • Multiple image maps (up to nine) may be loaded in memory at once
  • Real maps are fully supported, allowing negative and null values as well
  • Overlayed contours are automatically transformed to underlying coordinates
* New commands
  • map - Image map information and manipulation
  • marith - Perform arithmetic on image maps
  • syscall - Spawn system command (Replaces $ spawning)
  • coord - Perform (scriptable) coordinate conversion
  • screengrab - Captures current appearance of /xtk plot
  • bglevels - Calculate background levels (mainly for internal use by contour/statistic)
  • gencolor - Extracts red, green, and blue ranges from event file, then spawns external tool, mkcolor, to generate color image, and displays
  • draw - Draw shapes (mainly for internal use)
  • pimage - Plot image (mainly for internal use by display)
  • pcontour - Plot contours (mainly for internal use by contour)
* New options
  • colors
    • null - Specify color index with which to draw null pixels
  • contour
    • mapid - Plot contours for specified map
    • nocoortrf - Disable automatic coordinate transformation on overlay
    • statistic - Contour based on background statistics
    • sigma_levels - Contour based on sigma levels based on background statistics
    • mult_levels - Contour based on multiples of background
    • background - Specify value for background
  • cpd
    • leaveopen - Leave /xtk device open when changing device (mainly for internal use)
  • display
    • mapid - Plot image for specified map
  • hotspot
    • angle - Specify angle of text
    • just - Specify justification of text
  • iminfo
    • widscale - Specify width of image scale bar
  • label
    • clip - Turn on clipping, so labels outside viewport aren't plotted
    • text - Specify label text with qualifier
  • levels
    • histo - Calculate levels based on histogram equalization
    • linear - Calculate levels based on linear scaling
    • log - Calculate levels based on logarithmic scaling
    • sqrt - Calculate levels based on square-root scaling
    • minlevel - Set minimum level in calculation
    • maxlevel - Set maximum level in calculation
    • list - Enter levels as Tcl list, e.g. {1 2 3 4} or "1 2 3 4"
  • read_image
    • mapid - Read image into specified map
    • tcol - Set time column
  • smooth
    • real - Retain real values after smoothing instead of truncating to integers
  • sosta
    • bgregion - Specify background with region
    • srcregion - Specify source with region
  • surface
    • xmin,xmax,ymin,ymax,refresh - Added to allow zooming in on /xtk device (mainly for internal use)
  • viewport
    • switch - In combination with number, selects the viewport to which all coordinate retrieval refers
    • info - Print information on the contents of displayed viewports
  • vplabel
    • text - Specify label text with qualifier
  • write_image
    • mapid - Write specified map to a file
    • nonull - Zero out null values in output image
* Altered commands and options
  • alias
    • (all options removed) - Only supported syntax: alias <newcmd> <oldcmd>
  • centroid
    • plot - Removed as new default is to plot centroid location
  • contour
    • coordsaved - Removed as coordinate transformation is now automatic on overlay.
      Old procedure: read;disp;save;read;cont/over/coordsaved
      New equivalent: read;disp;save;read;cont/over
  • extract
    • regionfile=@filename - When preceded by @, filename is assumed to be list of regionfiles to perform color extraction on
  • info->iminfo
    • (name change) - Tcl's info command conflicts, so ximage info command is now iminfo
  • keywords (aka ?)
    • (modified behavior) - Now takes user to keywords prompt, like help
  • levels
    • ldshow - Removed as show and ldshow now correspond to same levels
  • pixel_to_radec
    • plot - Removed as new default is to plot specified location
  • sosta
    • cursor - Removed - Now default
    • loop - Removed
    • no_of_boxes - Removed
    • size_of_boxes - Removed
* Previous releases
Ximage Home Page Xanadu Home Page Xanadu ftp site
Please send reports of errors to : xanprob@athena.gsfc.nasa.gov
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Last modified: Wednesday, 12-Jul-2006 09:12:24 EDT

HEASARC Staff Scientist Position - Applications are now being accepted for a Staff Scientist with significant experience and interest in the technical aspects of astrophysics research, to work in the High Energy Astrophysics Science Archive Research Center (HEASARC) at NASA Goddard Space Flight Center (GSFC) in Greenbelt, MD. Refer to the AAS Job register for full details.