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Position Editor Toolbar
The Position Editor Toolbar provides quick access to the most commonly used features from the menu bar. The buttons have the following action:
- Open - bring up a file selection dialog to load a previously saved image.
- Back - move backwards in image history list.
- Forward - move forward in image history list.
- Cut levels - bring up a dialog of showing the distribution of pixel values for the displayed image. The minimum and maximum display levels can be set either with the slider or the Auto Set buttons.
- Images - queries the the default image server using the base coordinates of the observation selected in the Program Editor. The default can be changed by selecting a new server from Catalog -> Image Servers in the menu bar (the current default is marked with a black dot).
- Manual GS - opens the Catalog Query Tool or the GeMS Guide Star Search Tool (GeMS observations only) for doing quick guide star searches. The coordinates for the search is the base position of the observation selected in the Program Editor. Likewise the Instrument is set using the instrument component of the selected observation in the Program Editor. The Guide Star Type and the Catalog is remembered from the last query. The combination of the instrument and guide star type determine the minimum and maximum radii and the limiting magnitude for the query.
If a position angle of PA ± 180 degrees is acceptable for your observations, then select "Allow 180 flip" in the instrument component:
With this option permitted the guide star selection will automatically change the PA if a brighter guide star is available at PA ± 180 degrees.
If no guide star is available at the current PA or PA ± 180 and PA is not important for your observations, then you should check if a guide star is available at another PA. All guide stars that are usable with the current conditions constraints are marked with red circles on the Position Editor and can be quickly selected with the + GMOS/FII OIWFS PE button.