Contents

• Introduction
  • Overview
  • History
  • Calibration Information
  • Caveat Emptor
  • Installation
  • Reporting problems
• Getting Started
  • Command
    • Syntax
    • Recalling
    • Scripts
    • Spawning
  • Data
    • Images
    • Displaying
    • Split screen
    • Viewports
    • Exposure Maps
    • Background Maps
    • Saved Images
    • Writing
    • Spectra and Lightcurves
  • Coordinates and Overlays
    • Grid
    • Pixel Coordinate Conversions
    • Equinox Year
    • Slice
    • Skymap
    • Skyview
• Source analysis
  • Sosta
  • Background
  • Detect
  • Remove
    • Regions
  • Extract
  • Color Color Diagrams
  • PSF
• Mosaics
  • Without Exposure Maps
  • Overlays
  • With Exposure Maps
• Commands
  • alias - rename a command string
    • alias/previous [new_name]
    • alias/delete
    • alias/show string
    • alias/system
  • background - calculate average image background.
    • background/draw_rej_back_boxes
    • background/box_size=n
    • background/npd=n
    • background/optimize
    • background/plot_pd
    • background/file_pd
  • box - select a box region
    • box/excluded
    • box/regionfile=filename
    • box/new
    • box/displayonly
  • cct - change colour table
    • cct/loop
    • cct/no_break
    • cct/user_col
  • circle - select a circular region
    • circle/excluded
    • circle/regionfile=filename
    • circle/new
    • circle/displayonly
  • cl - change the number of colour levels
    • cl/number_of_levels=nn
  • close_pg_window - close the pgplot graphics window.
  • contour - display iso-intensity contour levels
    • contour/linear
    • contour/log
    • contour/histo
    • countor/div_map
    • countor/div_saved
    • contour/sub_map
    • countor/exposure
    • countor/saved_image
    • countor/correct_exposure
    • contour/no_frame
    • contour/no_of_cont_levels=nn
    • contour/first_contour_drawn=nn
    • contour/color=m
    • contour/overlay
    • contour/left
    • contour/right
    • cont/v1=x
    • cont/v1=x
    • cont/v2=x
    • cont/v3=x
    • cont/v4=x
    • cont/scale=x
    • cont/file=filename
  • grid - overlay a sky coordinate grid
    • grid/galactic
    • grid/color=n
    • grid/tick
  • cpd - change plot device
  • detect - source detection
    • detect/draw_rej_back_boxes
    • detect/source_box_size=
    • detect/back_box_size=m
    • detect/bright
    • detect/plot_excesses
    • detect/prob_limit
    • detect/snr_threshold
    • detect/thr_scaling
    • detect/file_out
  • display - display the current image
    • display/linear
    • display/log
    • display/histo
    • display/correct_exposure
    • display/exposure
    • display/div_map
    • display/div_saved
    • display/saved_image
    • display/sub_map
    • display/user_defined
    • display/levels_from_file
    • display/file=filename
    • display/table=name
    • display/noframe
    • display/overlay
    • display/left
    • display/right
    • display/v1=x
    • display/v1=x
    • display/v2=x
    • display/v3=x
    • display/v4=x
    • display/scale=x
    • display/spectrogram
    • display/refresh
  • cey - change the equinox
  • exit - quit
  • extract - a spectrum and a lightcurve
    • extract/c1=n
    • extract/c2=n
    • extract/c3=n
    • extract/c4=n
    • extract/detect
    • extract/detect/colorfile=file
    • extract/filename=file
    • extract/phafile=file
    • extract/plot/detect
    • extract/qdpfile=file
    • extract/region=file
    • extract/window=file
    • extract/phahigh=n
    • extract/phalow=m
    • extract/variability
    • extract/energy
    • extract/psf_pha
  • flux - Count-rate to flux conversion
    • flux/instrument=name
    • flux/nh=x
    • flux/slope=y
    • flux/temperature=z
    • flux/model=mod
    • flux/filter=n
    • flux/gal_correction
    • flux/count-rate=x
  • header - display the ximage header
    • header/exposure
  • help - ximage help
  • hotspot - show position of EXOSAT CMA hot spot
  • info - text overlay
    • info/xs=x
    • info/ys=x
    • info/scale=x
    • info/short
  • label - write labels on the image
    • label/color=n
    • label/size_of_symbol=x.x
    • label/symbol=n
    • label/width_of_symbol=n
    • label/xpix=x.x
    • label/ypix=y.y
  • levels - list intensity levels
  • log - open a log file
  • pixel_to_ra_dec - convert pixel to sky coordinates
    • pixel_to_ra_dec/cursor
  • polygon - define a polygon area
    • polygon/line
    • polygon/fill
    • polygon/symbol
  • psf - estimate the point spread function
    • psf/back=x
    • psf/box
    • psf/calfile
    • psf/cursor
    • psf/energy
    • psf/x=n
    • psf/y=m
    • psf/fileout=name
    • psf/print
    • psf/radius
  • ra_dec_to_pixel - sky to detector coordinates
    • ra/circle=arcsec
    • ra/ra=hms
    • ra/dec=dms
  • read_image - read an image or events files
    • read/exp_map
    • read/exosat
    • read/fits
    • read/xpr
    • read/rfits
    • read/compressed
    • read/xpix=n
    • read/ypix=n
    • read/ra=
    • read/dec=
    • read/degrees
    • read/equinox
    • read/size=n
    • read/rebin=n
    • read/detector
    • read/fits/header
    • read/min_pha=m
    • read/max_pha=n
    • read/min_pi=m
    • read/max_pi=n
    • read/t_min=mm.mm
    • read/t_max=nn.nn
    • read/image_number
    • read/file=filename
    • read/regionfile=filename
    • read/time
    • read/color
  • rebin - rebin the current image
    • rebin/mode=n
    • rebin/rebinning_fact=m
  • remove_sources - remove sources
    • remove/cursor
    • remove/x_min=xxx
    • remove/x_max=xxx
    • remove/y_min=yyy
    • remove/y_max=yyy
    • remove/detect
    • remove/nsources=n
    • remove/zero
  • rescale - rescale the current image
    • rescale/multiplicative
    • rescale/additive
    • rescale/scaling_factor=value
  • resize - change the pixels size of the current image
    • resize/pixel_size
  • restore_image - restore the saved image
  • rotate - rotate the current image
    • rotate/roll_angle=dms
  • saoimage - Start the SAOIMAGE display package
  • save_image - save the current image in memory
  • save_levels - save current color levels
    • save/file=name
  • scale - plot color scale
    • scale/label=``string"
    • scale/no_of_ticks
    • scale/vertical
  • script - write a command script
  • show - current ximage status
  • simulate - simulate an image
    • sim/part_background=
    • sim/cosmic_background
    • sim/catalog
    • sim/edit_pf
    • sim/size_of_image
    • sim/satelite
    • sim/detector
    • sim/flux_limit
    • sim/pixel_size
    • sim/zoom_s_f
    • sim/psf
    • sim/raster_scan
    • sim/file_psf
    • sim/fits
    • sim/output_fits_file
    • sim/exposure_time
    • sim/summary
    • sim/parameter_file
  • skymap - overlay a starchart
    • skymap/color=n
    • skymap/file_input=file
    • skymap/labels
    • skymap/browse_dcoord
    • skymap/rfits_simbad
    • skymap/size_of_symbol=n
    • skymap/symbol=n
    • skymap/width_of_symbol=n
    • skymap/print_off
    • skymap/class
    • skymap/dbase=databasename
    • skymap/old
  • skyview - retrieve an image from skyview
    • skyview/0408MHZ
    • skyview/1420MHZ_BONN
    • skyview/1420MHZ_BONN
    • skyview/DSS
    • skyview/EGRET<100
    • skyview/EGRET>100
    • skyview/EUVE_171
    • skyview/EUVE_405
    • skyview/EUVE_555
    • skyview/EUVE_83
    • skyview/file=name
    • skyview/HEAO1_A2
    • skyview/IRAS100
    • skyview/IRAS12
    • skyview/IRAS25
    • skyview/IRAS60
    • skyview/list_surveys
    • skyview/pspc
  • slice - draw an x or y slice of the image
    • slice/xslice
    • slice/yslice
    • slice/log
    • slice/color=m
    • slice/start_pixel
    • slice/end_pixel
    • slice/noooverlay
    • slice/filename
    • slice/output
    • slice/previous_frame
    • slice/mean
    • slice/spectrogram
  • smc - minimum display color level
  • smooth - gaussian image smoothing
    • smooth/exposure_map
    • smooth/sigma=n
    • smooth/scaling_factor=x
    • smooth/x_only
    • smooth/y_only
    • smooth/gaussin
    • smooth/wavelet
  • sosta - source statistics
    • sosta/x_source
    • sosta/y_source
    • sosta/source_box_radius
    • sosta/optimize
    • sosta/local_background
    • sosta/inner_radius=size
    • sosta/outer_radius=size
    • sosta/box_background=size
    • sosta/no_of_boxes=n
    • sosta/size_of_boxes=m
    • sosta/background_level=counts
    • sosta/cursor
    • sosta/loop
    • sosta/detect_sources
    • sosta/eef_source=frac
    • sosta/eef_background=frac
  • sum_images - add the saved and current images
    • sum_images/ra_center="hr mn sc``
    • sum_images/dec_center="deg mm ss``
    • sum/equinox
    • sum/degrees
  • title - write an image title
    • title/lower
  • vignet - correct exposure map for vignetting
  • write_image - write the current image to a file
    • write_image/exposure
    • write_image/display_map
    • write_image/exosat
    • write_image/fits
    • write_image/file=name
• Data formats
  • Input
    • EXOSAT - EXOSAT image files
    • Compressed_EXOSAT - Compressed EXOSAT images
    • FITS - FITS image files
    • RFITS - FITS events files
  • Output
    • EXOSAT Images
    • FITS Images
    • Spectral Format
    • QDP lightcurves
    • RFITS - Photon events file
• About this document ...