Spectroscopic confirmation of a cluster of galaxies at z=1 in the field of the gravitational lens MG2016+112

G. Soucail, J. P. Kneib, A. O. Jaunsen +3

We present new optical data on the cluster AX J2019+1127 identified by the X-ray satellite ASCA at z\sim 1 (Hattori et al. 1997). The data suggest the presence of a high-redshift c…