Re-pointing simulation results. Left: Simulated MGF tail light curve with XRT (blue) and NICER (red) assuming the properties as observed in the SGR 1806−20 MGF tail, and scaling it to the M82 distance of 3.5 Mpc. The inset shows the modulation that is embedded in the light curve. Right: Z₂² power for pulsation detection in XRT and NICER as a function of MGF distance. The dot-dashed and the dotted lines show the 4.5σ and 3σ detection significance (single-trial), respectively. The vertical dashed line is the M82 distance of 3.5 Mpc. See the main text for more details.