Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-03-23
Astron.J.130:1-12,2005
Astronomy and Astrophysics
Astrophysics
Accepted for publication in the Astronomical Journal. 33 Pages, 6 Figures
Scientific paper
10.1086/430528
This paper describes the observations and data reduction techniques for the version 2.0 images and catalog of the NICMOS Ultra Deep Field Treasury program. All sources discussed in this paper are based on detections in the combined NICMOS F110W and F160W bands only. The NICMOS images are drizzled to 0.09 arc second pixels and aligned to the ACS UDF F850LP image which was rebinned to the same pixel scale. These form the NICMOS version 2.0 UDF images. The catalog sources are chosen with a conservative detection limit to avoid the inclusion of numerous spurious sources. The catalog contains 1293 objects in the 144 x 144 arc sececonds NICMOS subfield of the UDF. The 5 sigma signal to noise level is an average 0.6 arc second diameter aperture AB magnitude of ~27.7 at 1.1 and 1.6 microns. The catalog sources, listed in order of right ascension, satisfy a minimum signal to noise criterion of 1.4 sigma in at least 7 contiguous pixels of the combined F110W and F160W image
Bouwens Rychard
Dickinson Mark
Eisenstein Daniel
Fan Xiaohui
Franx Marijn
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