Fig. 4
From: The Amerigo Vespucci as a traveling laboratory for studying the cosmic-ray fluxes at sea level

Distributions of fractional residual (in units of %) between the observed rate and the best fit model (colored points) with the Oulu detector (left panel) and with the Vespucci detector (right panel). The dashed black lines show Gaussian fits with the best-fit sigma value in the text box superimposed. The vertical bars indicate statistical uncertainties.