The Secret Lives of Galaxies Unveiled in Deep Survey

*Description*: The Chandra Deep Field-North image was made by observing an area of the sky over half the size of the full moon for 23 days. It is the most sensitive or "deepest" X-ray exposure ever made. By combining the Chandra and Hubble data for this field, astronomers can take a census of the fraction of young galaxies that contain active supermassive black holes back to a time when the universe was only about one billion years old, less than 10 percent of its present age. The data show that these very distant supermassive black holes are rare, more so than some expected. Technical facts about this news release: About the Observation Observation Name: GOODS Hubble Deep Field - North (GOODS: HDF-N) GOODS Chandra Deep Field - South (GOODS: CDF-S) Object Description: Optical Survey Optical survey Position (J2000): R.A. 12h 36m 55s Dec. +62Ôø_Ôø_ 14' 15" R.A. 03h 32m 30s Dec. -27° 48' 20" Constellation: Ursa Major Fornax Dimensions: Approximately 10' x 16' Approximately 10' x 16' About the Data Description: These GOODS datasets are from the Hubble proposals: 9425 and 9583. The science team includes M. Giavalisco (STScI), A. Barger (U. Wisconsin, Madison), N. Brandt (PSU), S. Casertano (STScI), C. Cesarsky (ESO), C. Conselice (Caltech), L. Cowie (U. Hawaii) S. Cristiani (Osservatorio Astronomico Trieste), T. Dahlen (STScI), D.de Mello (JHU), M. Dickinson (STScI), S.M. Fall (STScI), C. Fassnacht (STScI), H.C. Ferguson (STScI), R. Fosbury (ST-ECF), A. Fruchter (STScI), J. Gardner (GSFC), G. Garmire (PSU), N. Grogin (STScI), R. Hook (ST-ECF), R. Idzi (JHU), A. Koekemoer (STScI), C. Kretchmer (JHU), Kyoungsoo Lee (JHU), B. Leibundgut (ESO), M. Livio (STScI), R. Lucas (STScI), P. Madau (UC Santa Cruz), B. Mobasher (STScI), L. Moustakas (STScI), C. Papovich (U. Arizona), S. Ravindranath (STScI), A. Renzini (ESO), M. Richardson (STScI), A. Riess (STScI), Piero Rosati (ESO), H. Spinrad (UC Berkeley), E. Schreier (STScI), D. Stern (JPL/Caltech), M. Stiavelli (STScI), M. Urry (Yale Univ.), and R. Williams (STScI). Also on the team are Y. Park (JHU), A. Hornschemeier (JHU), R. Somerville (STScI), S. Jogee (STScI), D. Alexander (PSU), F. Bauer (PSU), E. Chatzichristou (Yale Univ.), B. Simmons (Yale Univ.), S. Cristiani (Osservatorio Astronomico Trieste), E. Daddi (ESO), M. Nonino (Osservatorio Astronomico Trieste), and J. Lotz (UCSC). GOODS Hubble Deep Field - North GOODS Chandra Deep Field - South Instrument: ACS/WFC ACS/WFC Filters: F435W ("B"), F606W ("V"), F775W ("i"), F850LP ("z") F435W ("B"), F606W ("V"), F775W ("i"), F850LP ("z") Exposure Dates: Nov 2002 - May 2003 July 2002 - Feb 2003 Exposure Time: 5 days 5 days About the Image Image Credit: NASA, ESA, the GOODS Team and M. Giavalisco (STScI) Release Date: June 19, 2003 Orientation: HDF-N HST/ACS/WFC Full Mosaic [ http://imgsrc.hubblesite.org/hu/db/2003/18/images/d/formats/compass_large_web.jpg ] Image Credit: NASA, ESA, the GOODS Team and M. Giavalisco (STScI) Release Date: June 19, 2003 Orientation: CDF-S HST/ACS/WFC Full Mosaic [ http://imgsrc.hubblesite.org/hu/db/2003/18/images/e/formats/compass_large_web.jpg ] About the Observation Object Name: Chandra Deep Field - North (CDF-N) Chandra Deep Field - South (CDF-S) Object Description: Field of X-ray objects Field of X-ray objects Position (J2000): R.A. 12h 36m 45s.7 Dec. +62° 13' 58" R.A. 03h 32m 28s.2 Dec. -27° 48' 36" Constellation: Ursa Major Fornax Dimensions: CDF-N is 28 arcminutes square. CDF-S is 24 arcminutes square. About the Data Instrument/Bandpass: ACIS:0.5-2keV, 2-4keV, 4-8keV ACIS:0.5-2keV, 2-4keV, 4-8keV Exposure Date(s): Nov 1999; Feb, Nov 2000; Feb, Mar, Nov 2001; Feb 2002 Oct, Nov 1999; May, Jun, Dec 2000 Exposure Time: 2 Ms 1 Ms About the Image Chandra Deep Field - North (CDF-N) Image Credit: NASA/CXC/D.M. Alexander, F.E. Bauer, W.N. Brandt et al. Release Date: June 19, 2003 Orientation: CDF-N CXO/ACIS Full Image [ http://imgsrc.hubblesite.org/hu/db/2003/18/images/f/formats/compass_large_web.jpg ] Chandra Deep Field - South (CDF-S) Image Credit: NASA/CXC/D.M. Alexander, F.E. Bauer, W.N. Brandt et al., and Giacconi et al. Release Date: June 19, 2003 Orientation: CDF-S CXO/ACIS Full Image [ http://imgsrc.hubblesite.org/hu/db/2003/18/images/g/formats/compass_large_web.jpg ] *News Release Number:*: STScI-2003-18b

NASA Identifier: SPD-HUBBLE-STScI-2003-18b