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The prototype of the NIKA2 camera, NIKA, is an instrument operating at theIRAM 30-m telescope, which can observe simultaneously at 150 and 260GHz. One ofthe main goals of NIKA2 is to measure the pressure distribution in galaxyclusters at high resolution using the thermal SZ (tSZ) effect. Suchobservations have already proved to be an excellent probe of cluster pressuredistributions even at high redshifts. However, an important fraction ofclusters host submm and/or radio point sources, which can significantly affectthe reconstructed signal. Here we report on <20" resolution observations at 150and 260GHz of the cluster MACSJ1424, which hosts both radio and submm pointsources. We examine the morphology of the tSZ signal and compare it to otherdatasets. The NIKA data are combined with Herschel satellite data to study theSED of the submm point source contaminants. We then perform a jointreconstruction of the intracluster medium (ICM) electronic pressure and densityby combining NIKA, Planck, XMM-Newton, and Chandra data, focusing on the impactof the radio and submm sources on the reconstructed pressure profile. We findthat large-scale pressure distribution is unaffected by the point sourcesbecause of the resolved nature of the NIKA observations. The reconstructedpressure in the inner region is slightly higher when the contribution of pointsources are removed. We show that it is not possible to set strong constraintson the central pressure distribution without accurately removing thesecontaminants. The comparison with X-ray only data shows good agreement for thepressure, temperature, and entropy profiles, which all indicate that MACSJ1424is a dynamically relaxed cool core system. The present observations illustratethe possibility of measuring these quantities with a relatively smallintegration time, even at high redshift and without X-ray spectroscopy.

High angular resolution Sunyaev-Zel'dovich observations of MACS J1423.8+2404 with NIKA: Multiwavelength analysis