X-ray analysis of the cluster 3C 129

The cluster 3C 129 is classified as a rich cluster. An analysis of the prop erties of the cluster 3C 129 from ROSAT PSPC and HRI, Einstein IPC, and EXO SAT ME observations is presented. The mean temperature from a joint fit of the ROSAT PSPC and EXOSAT ME data is 5.5(+/- 0.2) keV. The luminosity is 0. 6x10(44) erg s(-1) in 0.2-2.4 keV and 2.7x10(44) erg s(-1) in 0.2-10 keV. W e find a cooling flow with a rate of similar to 84 M. yr(-1). The central g as density is 6x10(-3) cm(-3), and the ICM mass is 3.6x10(13) M.. The total cluster mass is similar to 5x10(14) M.. The X-ray morphology shows an east -west elongation, which is evidence for a recent merger event. The radio so urce 3C 129.1 is located near the X-ray centre. Another cluster member gala xy (the radio galaxy 3C 129) is a prototype of head-tailed radio galaxies, and is located in the west part of the cluster. The tail points along the g radient of intracluster gas pressure. There are no significant point X-ray sources associated with the AGNs of the two radio galaxies.