Top: Spectral energy distribution of SGR 0501+4516 from the X-ray to the NIR as measured one day after the first outburst. The X-ray spectra were obtained by XMM-Newton. We show NIR observations without extinction correction (lower, red points) and with extinction correction (upper, blue points) assuming a total Galactic E(B − V) = 1.3 in that direction. The true extinction will lie between these extremes (see Fig. 4). Bottom: K-band and X-ray spectral energy distribution at ∼200 days. In grey are the late-time i-band flux level (Dhillon et al. 2011) and the F125W and F160W HST fluxes from the 2020 epoch. In both panels, the X-ray data are fitted with the models from Rea et al. (2009, cyan lines). Unabsorbed (and extrapolated) versions of these models are shown with magenta lines.