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Retrieve the Data

All of the images that we take with the 16-inch telescope will be stored on the astronomy lab computers in a directory /moore. Look for a subdirectory with the date of the observations. This directory contains the original ``fits'' image files, and a file of notes that describe each image.

These systems run Linux and have a ``Gnome'' user interface, so there will be a familiar looking graphical screen with icons available. Most work with Linux or Unix is done from the command line, so begin by opening a ``Console'' into which you can type commands. The icon for a console is the image of a computer screen on the top bar. It may have a large X on it as well. Double click this icon and a console window should appear. If you want more than one window, just do this again. You also have four ``workspaces'' available represented by the small images at the bottom right. Click on one these if you need an uncluttered screen. Linux is multi-tasking and you may do several things at once.

Here are a few help commands that can be typed into the console screen that you may need:

cd change directory
mkdir create a directory
ls list files in the directory
ds9 display images
fits_subtract subtract two images
gimp manipulate appearance of images
xephem interactive ephemeris displays the sky
xmccd run a scientific ccd camera
xmtel run a telescope
To begin


next up previous
Next: Display the Fits Images Up: Reduction of 16-inch Telescope Previous: Reduction of 16-inch Telescope
John Kielkopf
2004-11-30