The Elixir Display Tool (edisp)

The 'edisp' Elixir Display Tool provides a variety of real-time feedback information to observers during a CFH12K run. This tool may be launched by clicking on the 'Elixir Display' button (with the spiral galaxy). The program provides a graphical window with two menu options: 'File' and 'Plots'. The 'File' button lets the user exit the program. The 'Plots' button gives the user a list of Elixir realtime display plots from which to choose. Below, we provide a detail of each of these plots. Most plots will automatically refresh. Occasionally, this feature fails. In this case, the user should reselect the plot from the menu. The bottom line of the display tools gives status information about the most recent images. The left side gives the name, FWHM (in arcsec), and filter for the most recent OBJECT image. This information is updated within a few seconds of the end of image readout. The right-hand label gives the image corresponding to the displayed greyscale image. Since This display takes somewhat longer than the seeing statistics, the label allows the user to know when the image is updated. There are two types of plots: those which are related to a specific image, and are triggered by the image acquisition system, and those which are generated on a regular basis and display aggregated quanities of many images. This latter set of images includes those related to the CFH12K data and those related to SkyProbe. The SkyProbe plots are generated once per minute between 18:00 HST and 06:00 HST. The CFH12K plots are generated once per 5 minutes between 18:00 HST and 06:00 HST.

  • biases Plot of bias offset versus time for all 12 CCDs over the past the 3 hours. The bias offset is the difference between the observed bias and the nominal bias for each chip.
  • skyprobe recent Plot of the most recent 3 hours of SkyProbe measurements (see also the SkyProbe About and Recent pages).
  • skyprobe night Plot of the current night's SkyProbe measurements (see also the SkyProbe About and Tonight pages).
  • sky vs time Plot of the sky flux (log counts per second) vs time for CFH12K images for the past 3 hours, with different filters labeled in different colors.
  • sky vs airmass Plot of the sky flux (log counts per second) vs airmass for CFH12K images for the past 2 days, with different filters labeled in different colors.
  • FWHM vs time Plot of the image quality on CCD 03 (arcsec) vs time for CFH12K images for the past 3 hours, with different filters labeled in different colors.
  • FWHM vs airmass Plot of the image quality on CCD 03 (arcsec) vs airmass for CFH12K images for the past 2 days, with different filters labeled in different colors.
  • field (small) A 1 degree map of the field around the most recent CFH12K image.
  • field (large) A 10 degree map of the field around the most recent CFH12K image.
  • temperatures Plot of various temperatures vs time for each CFH12K image for the past 3 hours.
  • image (10x10) Full mosaic image from CFH12K, binned 10x10 and displayed in greyscale. The bias offset is subtracted from the image and the cuts scaled to make the stars visible.
  • focus (unit) Focus Analysis Plot.