  We search for a unified instrumental explanation of the spectral features
seen near $E_\gamma=130$ GeV in photons collected by Fermi-LAT from the
galactic center and from the Earth's limb. We report for the first time a
similar feature in photons originating from the vicinity of the Sun, and
examine the instrumental characteristics of this Solar feature. To test an
instrumental hypothesis, we identify the range of photon incident angles where
most of the peak photons are observed in these three spectral features. An
examination of the spectrum of photons from the rest of the sky with this
characteristic angular range reveals a hint of a spectral feature near
$E_\gamma=130$ GeV. These results cast further doubt on the
dark-matter-annihilation interpretation of the galactic center peak.

High Energy Astrophysical Phenomena;High Energy Physics - Experiment;High Energy Physics - Phenomenology