Temperature and filling factor evolution of EVRT-2509887 (top) and EVRT-3586872 (bottom) based on a blackbody fit to continuum regions BW1–BW6 from A. F. Kowalski et al. (2013). Error bars (1σ) were determined using the bootstrap procedure described in Section 6.1. The data shown in these panels are available as data behind the figure.

(The data used to create this figure are available in the online article.)

(The data used to create this figure are available.)