exptest

gammapy.time.exptest(time_delta)

Compute the level of variability for a certain period of time.

The level of variability is quantified by mr, as defined in Prahl (1999).

For constant rate events, it follows a standard normal distribution, i.e. it can be used directly as the significance of variability.

For example usage, see Variability test.

Parameters:

time_delta : array-like

Time differences between consecutive events

Returns:

mr : float

Level of variability

References

[R12]

Prahl (1999), “A fast unbinned test on event clustering in Poisson processes”, Link