Notes. Each data point in the green band spans around 18.8 min and is the combination of four single images, there is an overlap of around 14.1 min between consecutive data points with the same OBSID (except when some outliers have been removed). For the red band each data point spans around 28.2 min and is the combination of six single frames, there is an overlap of around 23.5 min between consecutive data points with the same OBSID (except when some outliers have been removed). Thermal light curves in Fig. 2 have been obtained from these data folding the dates with the Haumea’s rotational period and computing a running mean with a temporal bin of 0.05 in rotational phase. OBSID are the Herschel internal observation IDs, JD are the Julian dates at the middle of the integration uncorrected for light-time (the mean one-way light-time for OBSID 1342188470 is 426.329455 min, and 421.967915 min for OBSID 1342198851), Band are the different filters (green or red) used to observe with PACS, Flux/unc are the in band fluxes and 1-σ associated uncertainties expresed in millijansky (mJy), these values must be divided by the factors 0.98 and 0.99 for the green and red bands, respectively, to obtain color corrected fluxes/uncertainties. The zero time used to fold the rotational light curves in Fig. 2 is JD = 2 455 188.720000 days (uncorrected for light-time, the one-way light-time for this date is 426.308537 min).