Speaker
Stanislav Stefanik
(Institute of Particle and Nuclear Physics, Charles University in Prague)
Description
We describe a straightforward modification of frequently invoked methods
for the determination of the statistical significance of a $\gamma$-ray
signal observed in a counting process.
A simple criterion is proposed to decide whether a set of measurements
of the numbers of photons registered in the source and background regions
is consistent with the assumption of a constant source activity.
This method is particularly suitable for immediate evaluation of
the stability of the observed $\gamma$-ray signal.
It is independent of the exposure estimates, reducing thus the impact
of systematic inaccuracies, and properly accounts for the fluctuations
in the number of detected photons.
The usefulness of the method is demonstrated on several examples.
We discuss intensity changes for $\gamma$-ray emitters detected
at very high energies by the current $\gamma$-ray telescopes
(e.g. 1ES 0229+200, 1ES 1959+650 and PG 1553+113).
Some of the measurements are quantified to be exceptional
with large statistical significances.
| Registration number following "ICRC2015-I/" | 204 |
|---|---|
| Collaboration | -- not specified -- |
Primary authors
Jana Noskova
(Czech Technical University, Prague)
Stanislav Stefanik
(Institute of Particle and Nuclear Physics, Charles University in Prague)
dalibor nosek
(Charles University)
