1D WT detector profiles from V404 Cyg calculated over the restricted energy band of 0.7–3.0 keV, chosen to emphasize the soft dust scattering emission over that of the harder central source. (a) The profile obtained on day 2.790 (solid line) is that expected for a typical point source. Following the final flare, the profiles from days 11.229 (dashed), 11.628 (dash–dotted), 13.226 (dotted) revealed extended emission from multiple rings associated with a dust scattering halo, which expand and fade with time. (b) Comparison of the halo profiles taken at a comparable time after the two brightest INTEGRAL detected flares, indicating the halo on day 11.229 (dashed) was four times brighter than the one on day 5.836 (solid), consistent with ratio of the fluences from the two flares (see Section 2.1).