After a successful query is retrieved, the Image View will display all of the objects within a fixed radius, from the given point, in the format of a scatter plot.
Reading the Chart
Reading the chart is very similar to reading a scatter plot graph. The domain and range axes represent the Right Ascension and Declination respectively. Instead of normal floating point or whole number values on the axes, the value is given in a sexidecimal format (hh:mm:ss & ±dd:mm:ss).
All the black objects represent stars found within the radius of the search. Any star whose magnitude is brighter than, or less than, 8 has the largest size associated with it. Stars with magnitudes between 8 and 13 are given medium sized dots and all other stars with a magnitude fainter than 13 are represented by the smallest of dots. The Blue dot represents the given RA and Dec that the query was based around.
The two annuli and the square represent the GWAVES's display set up. The viewable area through this instrument is between the two annuli where the square does not overlap. In the event that the orientation of the instrument is rotated to match how the sky is viewed, the blue half marks the "top" half of the instrument's view while the red marks the "bottom." The black divider line is part of the instrument while within the two annuli. The remainder of the line to the outside are to help you see where the rest of the stars lie with respect to the top and bottom half.
If there is no information to display, the chart will be displayed as shown below.
Chart Interaction
Selecting a Star
To select a star, you only need to click on the desired star. When a star is selected, it will have a green circle encompass the star to show which star is currently selected. The image below shows a star that is selected. Also, the table in the Table View will highlight the star's information and make it visible. Once you have selected a star, you have the option to send that star's information, via JMS in XML format, as a guide star or wavefront sensor to the instrument. This is done by pressing the User View's button: Send Coordinates.
Adjusting Instrument Orientation
In the likely event that the orientation of the instrument with respect to the sky does not match the graph's orientation, you have the ability to rotate the graph's representation of the instrument. There are a few ways this can be accomplished: manually, on the User View 's panel, you can input the desired angle and click on Rotate Instrument. You can also go to the menu bar under "Graph" and select either Rotate CW or Rotate CCW, which will change the orientation of the graph by 15 degrees Clockwise or Counter-Clockwise respectively. Alternatively, you can use a shortcut key to achieve a 15 degree rotation as well by pressing the Command or Ctrl key (OS dependent) along with the right or left arrow keys. If rotated, the current angle will be updated on the User View's panel as well. The image below shows the instrument's orientation to be rotated to an angle of 150 degrees. Notice that now the blue, or the "top," half is on the lower half of the graph now.
Annotating the Stars
The chart comes with the option to annotate the stars on the graph with a predetermined ID number. These ID's correlate directly with the star's ID on the table. This option can be toggled from the menu under "Graph" and then select Annotate. The shortcut Command or Ctrl (OS dependent) + 'A' will also toggle the annotations. The User View also has a check box labeled Annotate Graph that provides the same function.
The image below illustrates the graph with the annotations toggled on.
As you can see, some of the stars are clustered so close together that their respective annotations overlap one another. To gain a clearer view of the annotations, you can always zoom over a desired section as shown below. The section displayed represents the middle/bottom area between the annuli.
Trace Crosshairs
To change the cursor from just the regular mouse to having crosshairs pinpoint exactly where your cursor is pointed, go to "Graph" in the menu and select Trace Crosshairs. The shortcut key for this is Command or Ctrl (OS dependent) + 'T'. This can also be toggled from the User View panel in the check box labeled Trace Crosshairs. The image below shows the trace crosshairs over a newly selected star on the graph.
Zooming In and Out
If you would like to get a better view of a select group of stars or if you would rather have a wider view of the graph, there is an option to zoom in or out. There are a few different ways to zoom in. Going under the menu to "Graph," you can select Zoom In and it will zoom in around the center of the graph. There is also a shortcut key assigned to this function being Command or Ctrl (OS dependent) + '+'. Also, by right-clicking on the graph, a menu will pop-up that has the options to zoom on one or both of the axes. Lastly, if you want to zoom in on a certain part of the graph, you can click and drag a box over the desired area and it will only display that area in a magnified form. With the exception of the click and drag ability, zooming out can be accomplished in a similar form. The shortcut key to zoom out is Command or Ctrl (OS dependent) + '-'. A query zoomed in around the queried point is shown below.
Restoring the Graph
To restore the graph to its original size, without annotations, and have all stars unselected, go to the menu and under "Graph", select Restore Graph. The orientation of the instrument will also be reset to 0.0 degrees. A shortcut key for this operation is Command or Ctrl (OS dependent) + 'C'. On the User View's panel, you can also press the button labeled Reset Graph.