Opening Up the Telescope

A TA should open the shed on the roof; turn on the main power for the telescope on the console in the slit room, if it isn't already on. Now click the mouse on the "open/stow" button in the main telescope control window. Another subwindow will open showing the status of the telescope and its various parts. Check that the status indicators in the "open/stow" window are green (tower door and autoenable should be red). Click on the "open" button to unstow the telescope. If you want the door of the #2 mirror in the tower to remain closed, (it should be open for observing!) click the mouse on the little box indicated in the window for this purpose before you unstow the telescope. When the telescope is open (i.e. ready to slew to a star), a comment will be added to the status box in the main window. This should happen almost immediately after you click the "open" button. The open/stow window may be closed by clicking on the "close" button in the lower right corner (this does NOT close the telescope!)

The telescope does not need to be in the stow position to start up the tcp program or restart the tcp computer (Iris). But every time the program or the computer is restarted or a drive alarm trips, you MUST reinitialize the telescope by clicking the mouse on the "open" button in the "open/stow" window.

To find a bright star near the meridian, follow the steps listed under "find a star near an approximate position" in the section on using the star cache window. Now set the "next" field in the main telescope control window to active, and click the mouse on the "go there" button. The telescope will slew to the bright star's coordinates. The star should appear on the TV; if not, you may have to check the eyepiece in the slit room. Center the star on the slit with the handpaddle. (Note that the hand paddle will be set to "set" speed after every preset.) Once a setup star is centered on the slit, you can zero the telescope coordinates by clicking on the "z" button. The "z" button should be used only when you are very confident of your coordinates.

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