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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 forbackground photons -- the distributions of incident angles, the recorded time,features of the spacecraft position, the zenith angles, the conversion type anddetails of the energy and direction reconstruction. The presence of a strikingfeature or cluster in such a variable would suggest an instrumental cause forthe peak. In the publically available data, we find several suggestive featureswhich may inform further studies by instrumental experts, though the size ofthe signal sample is too small to draw statistically significant conclusions.

Disentangling Instrumental Features of the 130 GeV Fermi Line