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Title:
Infrared Array Camera (IRAC) Imaging of the Lockman Hole
Authors:
Huang, J.-S.; Barmby, P.; Fazio, G. G.; Willner, S. P.; Wilson, G.; Rigopoulou, D.; Alonso-Herrero, A.; Dole, H.; Egami, E.; Le Floc'h, E.; Papovich, C.; Pérez-González, P. G.; Rigby, J.; Engelbracht, C. W.; Gordon, K.; Hines, D.; Rieke, M.; Rieke, G. H.; Meisenheimer, K.; Miyazaki, S.
Affiliation:
AA(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138.), AB(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138.), AC(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138.), AD(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138.), AE(Spitzer Science Center, California Institute of Technology, 1200 East California, Pasadena, CA 91125.), AF(Department of Astrophysics, Oxford University, Keble Road, Oxford, OX1 3RH, UK.), AG(Steward Observatory, University of Arizona, Tucson, AZ 85721.), AH(Steward Observatory, University of Arizona, Tucson, AZ 85721.; Institut d'Astrophysique Spatiale, bat 121, Universite Paris Sud, F-91405 Orsay Cedex, France.), AI(Steward Observatory, University of Arizona, Tucson, AZ 85721.), AJ(Steward Observatory, University of Arizona, Tucson, AZ 85721.), AK(Steward Observatory, University of Arizona, Tucson, AZ 85721.), AL(Steward Observatory, University of Arizona, Tucson, AZ 85721.), AM(Steward Observatory, University of Arizona, Tucson, AZ 85721.), AN(Steward Observatory, University of Arizona, Tucson, AZ 85721.), AO(Steward Observatory, University of Arizona, Tucson, AZ 85721.), AP(Steward Observatory, University of Arizona, Tucson, AZ 85721.), AQ(Steward Observatory, University of Arizona, Tucson, AZ 85721.), AR(Steward Observatory, University of Arizona, Tucson, AZ 85721.), AS(Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany.), AT(Subaru Telescope, National Astronomical Observatory of Japan, 650 North A'ohoku Place, Hilo, HI 96720.)
Publication:
The Astrophysical Journal Supplement Series, Volume 154, Issue 1, pp. 44-47. (ApJS Homepage)
Publication Date:
09/2004
Origin:
UCP
ApJ Keywords:
Cosmology: Observations, Galaxies: Evolution, Galaxies: High-Redshift, Infrared: Galaxies, Surveys
DOI:
10.1086/422882
Bibliographic Code:
2004ApJS..154...44H

Abstract

IRAC imaging of a 4.7m×4.7m area in the Lockman Hole detected over 400 galaxies in the IRAC 3.6 and 4.5 μm bands, 120 in the 5.8 μm band, and 80 in the 8.0 μm band in 30 minutes of observing time. Color-color diagrams suggest that about half of these galaxies are at redshifts 0.6<z<1.3 with about a quarter at higher redshifts (z>1.3). We also detect IRAC counterparts for six of the seven SCUBA sources and all nine XMM-Newton sources in this area. The detection of the counterparts of the SCUBA sources and galaxies at z>1.3 demonstrates the ability of IRAC to probe the universe at very high redshifts.
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