 | \textit{Top}: \planck\ spectra at $100$, $143$ and $217\,\mathrm{GHz}$ without subtraction of foregrounds. \textit{Middle}: SPT spectra from R12 at 95, 150 and $220\,\mathrm{GHz}$, recalibrated to \planck\ using the best-fit calibration, as discussed in the text. The S12 SPT spectrum at $150\,\mathrm{GHz}$ is also shown, but without any calibration correction. This spectrum is discussed in detail in Appendix~\ref{app:spt}, but is not used elsewhere in this paper. \textit{Bottom}: ACT spectra (weighted averages of the equatorial and southern fields) from D13 at $148$ and $220\,\mathrm{GHz}$, and the $148\times 220\,\mathrm{GHz}$ cross-spectrum, with no extragalactic foreground corrections, recalibrated to the \planck\ spectra as discussed in the text. The solid line in each panel shows the best-fit base \lcdm\ model from the combined \planck+WP+highL\ fits listed in Table~\ref{LCDMForegroundparams}. |