Image Details
Caption: Figure 2.
Event rate in bins of width ﹩{T}_{90}=48.0\,{\rm{s}}﹩ for the on-observation (at zero) and off-observations before and after the trigger time of GRB 151228B (zenith angle ∼11°). The red line shows the background model that is created by scaling the all-sky event rate fit from Figure 1. The vertical dashed lines show the region where data are not used for the scaling of the background model.
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