[VMP2002] 1RXS J131423.6-251521 R4 , the SIMBAD biblio

We present results from optical, X-ray and radio observations of two X-ray bright (L_X∼10⁴⁵erg/s) galaxy clusters. Abell 1451 is at redshift z=0.1989 and has line-of-sight velocity dispersion σ_v=1330km/s as measured from 57 cluster galaxies. It has regular X-ray emission without signs of substructure, a Gaussian velocity distribution, lack of a cooling flow region and significant deviations from the observed scaling laws between luminosity, temperature and velocity dispersion, indicating a possible merging shock. There is only one spectroscopically confirmed cluster radio galaxy, which is close to the X-ray peak. 1RXS J131423.6-251521 (for short RXJ1314-25) has z=0.2474 and σ_v=1100km/s from 37 galaxies. There are two distinct galaxy groups with a projected separation of ≃700kpc. The velocity histogram is bi-modal with a redshift-space separation of ∼1700km/s, and the X-ray emission is double peaked. Although there are no spectroscopically confirmed cluster radio galaxies, we have identified a plausible relic source candidate.