SIMBAD references

We report the discovery of a galaxy cluster at z=1.41. ISCS J143809+341419 was found in the Spitzer/IRAC Shallow Survey of the Boötes field in the NOAO Deep Wide-Field Survey carried out using IRAC. The cluster candidate was initially identified as a high-density region of objects with photometric redshifts in the range 1.3<z<1.5. Optical spectroscopy of a limited number of objects in the region shows that five galaxies within an ∼120" diameter region lie at z=1.41±0.01. Most of these member galaxies have broadband colors consistent with the expected spectral energy distribution of a passively evolving elliptical galaxy formed at high redshift. The redshift of ISCS J143809+341419 is the highest currently known for a spectroscopically confirmed cluster of galaxies.