Speca comma the Spiral-host Episodic radio galaxy possibly tracing Cluster Accretion

We recently discovered a unique radioloud AGN, Speca, the optically dominantmember of a small cluster at z0.137. Speca is the second spiralhost largeradio galaxy and also the second radio galaxy with three pairs of lobes. Theoutermost, relic lobes, separated by virgul1.3 Mpc, show an unexpectedly flat radiospectral index and a high fraction of linear polarization. These suggestlargescale shocklike dynamical processes acting in the cluster outskirts. Fromthe distribution of member galaxies we rule out a cluster merger and areinvestigating the possibility of accretion (shock) from filaments. We wish toimage the cluster environment of Speca with XMM to understand the AGNclusterecosystem as it evolves via accretion, merger and feedback processes. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]