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We present the results from new deep {\it Chandra} ($\sim410$~ks) and {\itSuzaku} ($\sim180$ ks) observations of the merging galaxy clusterZwCl\,0008.8+5215 ($z=0.104$). Previous radio observations revealed thepresence of a double radio relic located diametrically west and east of thecluster center. Using our new {\it Chandra} data, we find evidence for thepresence of a shock at the location of the western relic, RW, with a Machnumber $\mathcal{M}_{S_X}=1.48^{+0.50}_{-0.32}$ from the density jump. We alsomeasure $\mathcal{M}_{T_X}=2.35^{+0.74}_{-0.55}$ and$\mathcal{M}_{T_X}=2.02^{+0.74}_{-0.47}$ from the temperature jump, with {\itChandra} and {\it Suzaku} respectively. These values are consistent with theMach number estimate from a previous study of the radio spectral index, underthe assumption of diffusive shock acceleration ($\mathcal{M}_{\rmRW}=2.4^{+0.4}_{-0.2}$). Interestingly, the western radio relic does notentirely trace the X-ray shock. A possible explanation is that the relic tracesfossil plasma from nearby radio galaxies which is re-accelerated at the shock.For the eastern relic we do not detect an X-ray surface brightnessdiscontinuity, despite the fact that radio observations suggest a shock with$\mathcal{M}_{\rm RE}=2.2^{+0.2}_{-0.1}$. The low surface brightness andreduced integration time for this region might have prevented the detection.{\it Chandra} surface brightness profile suggests $\mathcal{M}\lesssim1.5$,while {\it Suzaku} temperature measurements found$\mathcal{M}_{T_X}=1.54^{+0.65}_{-0.47}$. Finally, we also detect a mergerinduced cold front on the western side of the cluster, behind the shock thattraces the western relic.

Evidence for a merger induced shock wave in ZwCl\,0008.8+5215 with {\it Chandra} and {\it Suzaku}