Bolometric light curve (top panel; overplotted are the absorbed power from the magnetar [solid black line] and from ⁵⁶Ni decay [dashed black line]), V-band light curve (middle panel), and U − V and V − I color evolution (bottom panel) for models r0e2 and its unmagnetized counterpart r0e2n. The glitch at 90 d in the V-band light curve of model r0e2 corresponds to a rapid change in photospheric conditions (temperature and ionization), at a time when the ejecta optical depth is 5 − 10. The offset between L_bol and ė_pm decreases with time in model r0e2 as the γ-rays from radioactive decay increasingly escape (the power from the magnetar is, by design, fully absorbed by the ejecta so the model eventually coasts to that value).