HESSI Analysis Intervals Widget

Click here to see the entire HESSI GUI Guide
 

This widget allows you to graphically select time or energy intervals for use in other sections of HESSI data analysis procedures..

This widget is activated when you click File /  'Select Analysis Intervals' / 'Define/Edit Analysis Intervals' in the Main GUI Window or when you click 'Define Bins Manually' in the HESSI Spectrum Widget.

Some tasks require selection of multiple time or energy intervals for analysis (e.g. imaging, spectral analysis).  For times, these analysis intervals are finer sub-intervals in the overall observation time interval you should have already selected.  Once defined, these intervals will be available for you to choose from in the widgets that require time or energy intervals.  For example, when you're defining the time intervals over which to make images in the Image Widget, this list appears as an option when you click the Change button for times.

Note: When you change the observation time interval, the analysis time intervals are deleted, since they are no longer within the observation time interval.

You can define time intervals on any time plot (x axis is time) that is currently displayed.  If no time plot is displayed, then a plot of Observing Summary Count Rate data is automatically generated for the observation time interval selected.

To define energy intervals, you must plot a spectrum first (this will be changed to automatically plot a spectrum if none is displayed).  

While this widget is activated, the meaning of mouse clicks on the plot is different from normal. Left-click to define the start of an interval and right-click to define the end. Double-click within an interval to activate an interval-editing menu. 

Note:  this obviously means that you can not zoom by clicking and dragging.  However you can still zoom if you click the Zoom button under the Plot_Control pull-down menu, and then click and drag.

Any analysis intervals currently defined are displayed in the droplist widget.  You can define new intervals in a number of ways:

• Below the widget that shows the currently defined intervals, there are buttons that let you edit or delete a single interval (select which one by highlighting it in the droplist), or edit  the entire list.  To edit, simply change the text in the XTEXTEDIT window, and click 'Finished editing'.  Be careful not to change the format of the interval entries.
   
• Left- and right-click to define start/end of intervals.  If you define a start, but change your mind, you can just left-click start again to move the start.  Or if you define a start, but then want to edit a different interval, it's OK.  The interval is not stored until you define the end.
   
• If 'Contiguous intervals' is selected then (after defining  at least one interval) just keep right-clicking to define multiple intervals.  The start of each interval will automatically be the end of the previous interval.
   
• If 'Force to Data Boundaries' is selected then each boundary that is defined (from then on, this has no effect on intervals already defined) is forced to the nearest data accumulation boundary.
   
• Once at least one interval is defined, double-clicking within an interval activates an interval-editing menu with these options:
  • Move start: Left click somewhere within the interval and drag to new start location
  • Move end: Left click somewhere within the interval and drag to new end location.
  • Move interval:  Left click somewhere within the interval and drag to new location. 
  • Delete interval:  Deletes the interval you already double-clicked in.
  • Break into N Sub-intervals:  Divides the interval you already double-clicked in into N of evenly spaced intervals.  You can set the number N in the 'Editing Option Parameters' / '# sub-intervals' field.
  • Break into Sub-intervals of Equal Length:  Divides the interval you already double-clicked in into intervals of length X, where X can be set in the 'Editing Option Parameters' / 'Length of Sub-intervals' field.

If the interval boundaries on the plot get confusing (sometimes it doesn't erase previous boundaries properly), click 'Display Current' to redraw them.

Click 'Accept and Close' to save these interval definitions.  They will be stored and available for use.

Last updated 29 October, 2001 by Kim Tolbert, 301-286-3965