excess_ul_helene

gammapy.stats.excess_ul_helene(excess, excess_error, significance)

Compute excess upper limit using the Helene method.

Reference: http://adsabs.harvard.edu/abs/1984NIMPA.228..120H

Parameters:

excess : float

Signal excess

excess_error : float

Gaussian excess error For on / off measurement, use this function to compute it: excess_error.

significance : float

Confidence level significance for the excess upper limit.

Returns:

excess_ul : float

Upper limit for the excess