Extended Data Figure 2: Broad-band spectral energy distribution of radiation by relativistic electrons.
From: Acceleration of petaelectronvolt protons in the Galactic Centre
The flux from synchrotron radiation, bremsstrahlung and IC scattering is compared to the fluxes of diffuse γ-ray emission measured by HESS (black points with vertical error bars). The flux of diffuse X-ray emission measured by XMM-Newton41 (black point with horizontal error bar) and integrated over the central molecular zone region is also shown. Inset (top right) shows a zoomed view of the spectral energy distribution in the VHE range (100 GeV–100 TeV). The vertical and horizontal error bars show the 1σ statistical errors and the bin size, respectively.
