Fig. A.1
GROND optical/NIR and XRT 0.3−10 keV light curves of the afterglow of GRB 120815A in the top panel. The data were fitted with a three-segment, smoothly broken power-law, with residuals shown in the bottom panel. The grey shaded area represents the time interval in which the X-shooter spectroscopy was obtained. X-ray data were converted into a flux density at 3 keV using a spectral index of β = 0.78, and scaled by a factor of 20 to enhance clarity.
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