lc3

Light Curve for 3 Series and Colour Colour Diagram (Application)

Application lc3 is to produce a light curve of three series of data and calculates and plots in different ways the soft (Series 2/ Series 1) and the hard (Series 3/Series 2) hardness ratio (colours). It is run in the Question/Answer user interface by typing:

[n]Xronos> lc3

[n]Xronos> lc3 [series1] [series2] [series3]

[n]Xronos> lc3[/qualifier1/qual2/... etc]  [series1] [series2] [series3]

More on lc3

The default newbin time is either the maximum bin time (if fewer than 512 newbins are expected) or such as to give a single interval with 512 newbins at most. The number of newbins per interval determines the length of the time axis of each interval and therefore the number of intervals that will be produced. Note that in light curve applications each frame can contain only results from one interval (i.e. intervals and frames coincide; see also chapter 2 terminology). Four different time axis units can be used for plotting:

• 0 for seconds from the start of the interval (which might be different from the time of the first accepted newbin)
• 1 for seconds from the start of the hour
• 2 for hours from the start of the day
• 3 for days