CL1358+62

CL 1358+62 is a galaxy cluster located at z=0.33 redshift. Behind the cluster, lensed into a red arc is an infant galaxy (CL 1358+62 G1) that was the farthest object in the observable universe for a few months. It had a record redshift of z=4.92 and was discovered on July 31, 1997 by M. Franx and G. Illingsworth. It is located approximately 26 billion light years from Earth. Its redshift was measured by the Keck Telescope shortly after its discovery. Along with G1, another galaxy also lensed, was found to be at z=4.92 (CL 1348+62 G2). [ Astrophysical Journal Letters v.486, p.L75 ; 09/1997, [http://adsabs.harvard.edu/abs/1997ApJ...486L..75F A Pair of Lensed Galaxies at z=4.92 in the Field of CL 1358+62] ; 1997ApJ...486L..75F ; 10.1086/310844] The pair of galaxies were the first things other than quasars to have the title of most distant object found, since the 1960s. ["Astrophysics and Space Science" 1999, 269/270, 165-181 ; GALAXIES AT HIGH REDSHIFT - [http://nedwww.ipac.caltech.edu/level5/Illingworth/Ill8.html 8. Z > 5 GALAXIES] ; Garth Illingworth] The pair of galaxies remained the most distant objects known until the discovery of RD1 at z=5.34, [arXiv, PDF|1= [http://arxiv.org/pdf/astro-ph/9803137 A Galaxy at z = 5.34] |2=209 KB, 11 March 1998] the first object to exceed redshift 5.

References

* [http://hubblesite.org/newscenter/archive/releases/1997/25/image/a/ Announcement of discovery on Hubble Telescope site]
* [http://antwrp.gsfc.nasa.gov/apod/ap970731.html Announcement of discovery by NASA]
* [http://www.spacetelescope.org/news/ ESA-Hubble]