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QUIRC User Guide
program is described here.
7.1 Setting up
The setup file .vf-init has been installed in the home directory of the user obs. If running from
a different user name, you must have this file in your home directory, as well as the *.cm files and
ps
proc. The program can be run by typing the following in any window:
%vf&
To display images automatically, one must set the data directory to be the same as where qcdcom is
storing the FITS files. This is done by clicking on the “File" button and entering the proper path. One
must also issue the command set vfout in qcdcom to enable the link so that data are displayed
automatically.
7.2 Image display options
The qcdcom program is set up to display the last file written. The images are displayed to the “Big
Image" buffer, called E or B4 in the program. If the program is in chop or dither subtract mode, it
displays the .chop image. If not, the last normal data file is displayed. The magnification of .5x
will display the entire QUIRC image.
One useful feature is that if the data are not being saved and vfout is on, the data file is still written
to the .chop image and displayed in vf. Therefore the observer can take focus frames, acquire and
center the object, etc., without saving all the images as separate data files. This avoids filling the disk
with useless files.
7.3 Quick VF tips
The VF manual has a complete listing of the capabilities of the program. Listed below are a few
quick tips to get started:
After starting the program, click on the “E" button below the four canvases to display the big image
canvas. The grayscale levels can be set to Auto or Fixed and the max and min set manually. The
stretch can then be adjusted by pressing the right mouse button and moving it around the image,
similar to saoimage.
The “Zoom on ObjBox" is a useful feature to zoom in on a source. After the imagehas been displayed,
make a box around it by moving to the lower left corner and press & hold the middle mouse button,
then move to the upper right corner and release. Then left click on the “Zoom on ObjBox" button
and it will magnify it. Click on the .5x button to go back to full scale. When zoomed in, you can
use the LineCut display mode to show the profile in the X and Y directions. Click on “Box" and turn
AutoScale on to display the cuts through the box in the X and Y directions. You may need to adjust
slightly the X and Y axis to go through the center of the source.