As in Fig. 7 but for the temperature profiles T(r). By construction, the REX profile uses a boundary condition T_b = 95.5 K at the reference radius r_b = 1302.4 km in order to connect it to the DO15 profile (solid black line). Thus, the intersection of the REX and DO15 profiles at r_b is a mere result of the choice of T_b, and is not ameasurement. There are no formal error bars on the temperature profile of Sicardy et al. (2016), as most of the errorscome in this case from biases; see text.