Technical facts about this news release: About the Object Massive Galaxy Cluster RDCS 1252 Object Name: RDCS 1252.9-2927 Object Description: Galaxy Cluster Position (J2000): R.A. 12h 52m 54s Dec. -29° 27' 17" Constellation: Hydra Distance: 9 billion light-years (2.6 billion parsecs) About the Data Data Description: The field was imaged by Hubble during proposal 9290: H. Ford (JHU), M. Postman (STScI), M. Franx (University of Leiden), J. Blakeslee (JHU) and P. Rosati (ESO). The science team presenting the science results on this object includes J. Blakeslee (JHU), M. Franx (Leiden Observatory), M. Postman (JHU/STScI), P. Rosati (ESO), B. P. Holden (UCO/Lick), G. D. Illingworth (UCO/Lick), H. C. Ford (JHU), N. J. G. Cross (JHU), C. Gronwall (JHU), N. Ben¯_¯_¯_tez (JHU), R. J. Bouwens (JHU), T. J. Broadhurst (Hebrew University), M. Clampin (STScI), R. Demarco (ESO), D. A. Golimowski (JHU), G. F. Hartig (STScI), L. Infante (Pontificia Universidad Catolica de Chile), A. R. Martel (JHU), G. K. Miley (Leiden Observatory), F. Menanteau (JHU), G. R. Meurer (JHU), M. Sirianni (JHU) and R. L. White (JHU/STScI). Instrument: ACS/WFC Exposure Date(s): May - June, 2002 Exposure Time: 21 hours Filters: F775W ("i"), F850LP ("z") About the Image Image Credit: NASA, ESA, J. Blakeslee (JHU), M. Postman (STScI), and P. Rosati (ESO) Release Date: January 1, 2004 About the Object Embryonic Galaxy Cluster TN J1338 Object Name: TN J1338-1942 Object Description: Galaxy Proto-Cluster Position (J2000): R.A. 13h 28m 26s Dec. -19° 42' 30" Constellation: Virgo Distance: Approximately 12 billion light-years (4 billion parsecs) About the Data Data Description: The field was imaged by Hubble during proposal 9291: H. Ford (JHU), G. Miley (Leiden Observatory), W. Sparks (STScI), Z. Tsvetanov and H. Tran (JHU). The science team presenting this paper includes G. K. Miley (Leiden Observatory), R. A. Overzier (Leiden Observatory), Z. I. Tsvetanov (JHU), R. J. Bouwens (UCO/Lick), N. Benítez (JHU), J. Blakeslee (JHU), H. C. Ford (JHU), G. D. Illingworth (UCO/Lick), M. Postman (STScI), P. Rosati (ESO), M. Clampin (STScI), G. F. Hartig (STScI), A. W. Zirm (Leiden Observatory), H. J. A. Röttgering (Leiden Observatory), B. P. Venemans (Leiden Observatory), D. R. Ardila (JHU), F. Bartko (Bartko Sci. & Tech), T. J. Broadhurst (Hebrew University), R. A. Brown (JHU), C. J. Burrows (JHU), E. S. Cheng (NASA-GSFC), N. J. G. Cross (JHU), C. De Breuck (ESO), P. D. Feldman (JHU), M. Franx (Leiden Observatory), D. A. Golimowski (JHU), C. Gronwall (JHU), L. Infante (Pontificia Universidad Catolica de Chile), A. R. Martel (JHU), F. Menanteau (JHU), G. R. Meurer (JHU), M. Sirianni (JHU), R. A. Kimble (NASA-GSFC), J. E. Krist (STScI), W. B. Sparks (STScI), H. D. Tran (JHU), R. L. White (STScI), and W. Zheng (JHU). Instrument: ACS/WFC Exposure Date(s): July 9 - 12, 2002 Exposure Time: 8.5 hours Filters: F475W("B"), F625W ("r"), F775W ("i") About the Image Image Credit: NASA, ESA, G. Miley and R. Overzier (Leiden Observatory) Release Date: January 1, 2004 *News Release Number:*: STScI-2004-01d
