We present a detailed study of the iron content of the core of the high-redshift cluster WARPJ1415.1+3612 ( z = 1.03 ) .
By comparing the central Fe mass excess observed in this system , M _ { Fe } ^ { exc } = ( 1.67 \pm 0.40 ) \times 10 ^ { 9 } M _ { \odot } , with those measured in local cool-core systems , we infer that the bulk of the mass excess was already in place at z = 1 , when the age of the Universe was about half of what it is today .
Our measures point to an early and intense period of star formation most likely associated with the formation of the BCG .
Indeed , in the case of the power-law delay time distribution with slope -1 , which reproduces the data of WARPJ1415.1+3612 best , half of the supernovae explode within 0.4 Gyr of the formation of the BCG .
Finally , while for local cool-core clusters the Fe distribution is broader than the near infrared light distribution of the BCG , in WARPJ1415.1+3612 the two distributions are consistent , indicating that the process responsible for broadening the Fe distribution in local systems has not yet started in this distant cluster .