SIMBAD references

We report on an XMM-Newton observation of RX J1347.5-1145 (z=0.451), the most luminous X-ray cluster of galaxies currently known, with a luminosity L_X=6.0±0.1x10⁴⁵erg/s in the [2-10]keV energy band. We present the first temperature map of this cluster, which shows a complex structure. It identifies the cool core and a hot region at radii 50-200kpc to south-east of the main X-ray peak, at a position consistent with the subclump seen in the X-ray image. This structure is probably an indication of a submerger event. Excluding the data of the south-east quadrant, the cluster appears relatively relaxed and we estimate a total mass within 1.7Mpc of 2.0±0.4x10¹⁵M_☉. We find that the overall temperature of the cluster is kT=10.0±0.3keV. The temperature profile shows a decline in the outer regions and a drop in the centre, indicating the presence of a cooling core which can be modelled by a cooling flow model with a minimum temperature ∼2keV and a very high mass accretion rate, {dot}(M)∼1900M_☉/yr. We compare our results with previous observations from ROSAT, ASCA and Chandra.