1208.3677 (Daniel Whiteson)

Disentangling Instrumental Features of the 130 GeV Fermi Line    [PDF]

Daniel Whiteson

We study the instrumental features of photons from the peak observed at $E_\gamma=130$ GeV in the spectrum of Fermi-LAT data. We use the {\sc sPlots} algorithm to reconstruct -- seperately for the photons in the peak and for background photons -- the distributions of incident angles, the recorded time, the zenith angles, the conversion type and details of the energy and direction reconstruction. The presence of a striking feature or cluster in such a variable would suggest an instrumental cause for the peak. We find no significant differences in the distribution of these quantities for photons in the peak or photons in the background.

View original: http://arxiv.org/abs/1208.3677