IRAC Imaging of Lockman Hole
J. -S. Huang, P. Barmby, G. G. Fazio, S. P. Willner, G. Wilson, D. Rigopoulou, A. Alonso-Herrero, H. Dole, E. Egami, E. Le Floc'h, C. Papovich, P. G. Perez-Gonzalez, J. Rigby, C. W. Engelbracht, K. Gordon, D. Hines, M. Rieke, G. H. Rieke, K Meisenheimer, S. Miyzaki
Abstract
IRAC imaging of a 4'7x4'7 area in the Lockman Hole detected over 400 galaxies in the IRAC 3.6 micron and 4.5 micron bands, 120 in the 5.8 micron, and 80 in the 8 micron bandin 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 6 of the 7 SCUBA sources and all 9 XMM 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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