Table 1: Fitted parameters describing the temporal evolution of the afterglow. $\delta _1$ and $\delta _2$ are the early- and late-time temporal slopes, and $t_{\rm b}$ is the break time (measured in hours since Aug. 13.1141 UT); see Eq. (1). Errors are 1- $\sigma$ .
Band $\delta _1$ $\delta _2$ $t_{\rm b}$ (h)

V $0.84\pm0.11$ $1.34\pm0.06$ $11.9\pm6.4$

R $0.76\pm0.05$ $1.46\pm0.04$ $13.7\pm1.2$

I $0.80\pm0.03$ $1.43\pm0.12$ $16.7\pm1.7$

All $0.78\pm0.02$ $1.44\pm0.04$ $14.2\pm0.8$

**Table 1:** Fitted parameters describing the temporal evolution of the afterglow. $\delta _1$ and $\delta _2$ are the early- and late-time temporal slopes, and $t_{\rm b}$ is the break time (measured in hours since Aug. 13.1141 UT); see Eq. (1). Errors are 1- $\sigma$ .
Band	$\delta _1$	$\delta _2$	$t_{\rm b}$ (h)
V	$0.84\pm0.11$	$1.34\pm0.06$	$11.9\pm6.4$
R	$0.76\pm0.05$	$1.46\pm0.04$	$13.7\pm1.2$
I	$0.80\pm0.03$	$1.43\pm0.12$	$16.7\pm1.7$
All	$0.78\pm0.02$	$1.44\pm0.04$	$14.2\pm0.8$

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