Compton y profile and X-ray temperature profile of A1689. a) The gNFW pressure profile fitted to A1689’s X-ray data is projected and transformed into a Compton y parameter profile (dashed red) and convolved with the Planck + ACT PSF to produce a realistic mock observation (red). This profile is overplotted to the real y profile (black) extracted from Planck + ACT data. b) NFW joint X-ray and SZ analysis of A1689, X-ray temperature profile posterior distributions of 2 models: spherical and elongated (respectively in orange and light blue, model names 1-b and 1-c in Table 2). The results of the analysis as a posterior model distribution on the SZ y parameter and X-ray brightness profiles for both models can be found in the Appendix.