Distribution of fitted background normalisations and spectral tilts (δ, cf. Eq. (2)). We show results for all 4-telescope observations (grey, filled histograms) and those used in the construction of the background model (green histograms). The mean (μ) and standard deviation (σ) of the distributions are indicated.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.