Creating a "User Defined Catalog" can be very useful because it allows you to compile a
catalog of objects not resident in Gemini's databases, or to limit a catalog to only those
objects needed for a particular night's observation. For your convenience, the objects
stored in Gemini' s permanent databases are available as .guc (Gemini User Catalog )
files on the above mentioned web site. These files can be used to build your own catalogs
for planned observing sessions.
5.3.3 Show Information
This menu item allows you to scroll through Gemini
s information buffer. Pressing the
RA+ button speeds up the scrolling, and pressing RA sets it back to the beginning if
pressed alone. Pressing first RA , then RA+ stops the scrolling and freezes the
information buffer display. If either of the DEC buttons is pressed, all scrolling stops and
Gemini proceeds to the adjacent menu item.
Upon powering up, the information buffer scrolls a welcome message, and later on
contains additional status information. It will contain object data after you select an item
from the database, mount modeling parameters after you do an "Additional Align" or
"Synchronize," and debug information if Gemini is in Debug Mode (powered on with a
button of the Hand Controller depressed). In Debug Mode, the commands received from
a connected PC (without numeric parameters) are stored in the buffer. Pressing the
MENU button while the welcome message is scrolling terminates the scroll.
5.3.4 GoTo
This menu item only appears if you previously selected a "Database Object," entered RA
and Dec coordinates using the Hand Controller or a PC, or an object was selected using
the Identify function. This menu item remembers the last selected object or
coordinates, and allows you to GoTo that object. Consequently, if you want to GoTo a
different object, the new object must first be selected from the "Object Database" (or one
of the other methods mentioned above). Slews to objects below the horizon will be
rejected. Pressing any Hand Controller button during the slew will interrupt the GoTo
function.
5.3.5 Guide AE
This menu item only appears if you have selected a "Database Object," entered RA and
Dec coordinates using the Hand Controller or a PC, or an object was selected using the
Identify function. This menu item shows the difference between the actual telescope
position and the unmodeled location of the selected object. You can move the telescope
manually (if you have encoders) and/or using the Hand Controller until the display shows
all zeros. Selecting this menu item switches you back to Telescope Control Mode. The
display saver is off so the display will not go blank while you are using this feature.
"Guide
AE
informing you of what deviations were calculated by the model after a GoTo. It can be
used to offset the polar axis when using the King method for photography. Refer to
chapter 4 for more details.
Gemini Users Manual
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