The NICMOS Ultra Deep Field: Observations, Data Reduction, and Galaxy Photometry
Abstract
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
Cite
@article{arxiv.astro-ph/0503504,
title = {The NICMOS Ultra Deep Field: Observations, Data Reduction, and Galaxy Photometry},
author = {Rodger I. Thompson and Garth Illingworth and Rychard Bouwens and Mark Dickinson and Daniel Eisenstein and Xiaohui Fan and Marijn Franx and Adam Riess and Marcia J. Rieke and Glenn Schneider and Elizabeth Stobie and Sune Toft and Pieter Van Dokkum},
journal= {arXiv preprint arXiv:astro-ph/0503504},
year = {2009}
}
Comments
Accepted for publication in the Astronomical Journal. 33 Pages, 6 Figures