Teplitz, Harry I. and Chary, Ranga and Elbaz, David and Dickinson, Mark and Bridge, Carrie and Colbert, James and Le Floc’h, Emeric and Frayer, David T. and Howell, Justin H. and Koo, David C. and Papovich, Casey and Phillips, Andrew and Scarlata, Claudia and Siana, Brian and Spinrad, Hyron and Stern, Daniel (2011) Spitzer infrared spectrometer 16μm observations of the GOODS fields. Astronomical Journal, 141 (1). Art. No. 1. ISSN 0004-6256 http://resolver.caltech.edu/CaltechAUTHORS:20110125-143537643
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We present Spitzer 16μm imaging of the Great Observatories Origins Deep Survey (GOODS) fields. We survey 150 arcmin^2 in each of the two GOODS fields (North and South), to an average 3σ depth of 40 and 65 μJy, respectively. We detect ~1300 sources in both fields combined. We validate the photometry using the 3–24μm spectral energy distribution of stars in the fields compared to Spitzer spectroscopic templates. Comparison with ISOCAM and AKARI observations in the same fields shows reasonable agreement, though the uncertainties are large. We provide a catalog of photometry, with sources cross-correlated with available Spitzer, Chandra, and Hubble Space Telescope data. Galaxy number counts show good agreement with previous results from ISOCAM and AKARI with improved uncertainties. We examine the 16–24μm flux ratio and find that for most sources it lies within the expected locus for starbursts and infrared luminous galaxies. A color cut of S_(16)/S_(24) > 1.4 selects mostly sources which lie at 1.1 < z < 1.6, where the 24μm passband contains both the redshifted 9.7 μm silicate absorption and the minimum between polycyclic aromatic hydrocarbon emission peaks. We measure the integrated galaxy light of 16μm sources and find a lower limit on the galaxy contribution to the extragalactic background light at this wavelength to be 2.2 ± 0.2 nW m^(−2) sr^(−1).
|Additional Information:||© 2011 The American Astronomical Society. Received 2010 March 16; accepted 2010 September 27; published 2010 December 6. Based on observations obtained with the Spitzer Space Telescope, which is operated by JPL, California Institute of Technology for the National Aeronautics and Space Administration. The IRS is a collaborative venture between Cornell University and Ball Aerospace Corporation that was funded by NASA through JPL. This work is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under NASA contract 1407. Support for this work was provided by NASA through an award issued by JPL/Caltech. This research has made use of the NASA/IPAC Infrared Science Archive (IRSA), which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.|
|Subject Keywords:||cosmology: observations – galaxies: evolution – galaxies: high-redshift – infrared: galaxies Online-only material: machine-readable and VO tables|
|Classification Code:||PACS: 98.54.Ep; 98.62.Ai; 98.62.Bj; 98.62.Py; 95.85.Hp; 98.62.Qz|
|Official Citation:||Harry I. Teplitz et al. 2011 The Astronomical Journal 141 1 doi: 10.1088/0004-6256/141/1/1|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Benjamin Perez|
|Deposited On:||25 Jan 2011 23:51|
|Last Modified:||26 Dec 2012 12:52|
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