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SpIES: The Spitzer IRAC Equatorial Survey

Timlin, John D. and Ross, Nicholas P. and Richards, Gordon T. and Lacy, Mark and Ryan, Erin L. and Stone, Robert B. and Bauer, Franz E. and Brandt, W. N. and Fan, Xiaohui and Glikman, Eilat and Haggard, Daryl and Jiang, Linhua and LaMassa, Stephanie M. and Lin, Yen-Ting and Makler, Martin and McGehee, Peregrine and Myers, Adam D. and Schneider, Donald P. and Urry, C. Megan and Wollack, Edward J. and Zakamska, Nadia L. (2016) SpIES: The Spitzer IRAC Equatorial Survey. Astrophysical Journal Supplement Series, 225 (1). Art. No. 1. ISSN 0067-0049.

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We describe the first data release from the Spitzer-IRAC Equatorial Survey (SpIES); a large-area survey of ~115 deg^2 in the Equatorial SDSS Stripe 82 field using Spitzer during its "warm" mission phase. SpIES was designed to probe sufficient volume to perform measurements of quasar clustering and the luminosity function at z ≥ 3 to test various models for "feedback" from active galactic nuclei (AGNs). Additionally, the wide range of available multi-wavelength, multi-epoch ancillary data enables SpIES to identify both high-redshift (z ≥ 5) quasars as well as obscured quasars missed by optical surveys. SpIES achieves 5σ depths of 6.13 μJy (21.93 AB magnitude) and 5.75 μJy (22.0 AB magnitude) at 3.6 and 4.5 μm, respectively—depths significantly fainter than the Wide-field Infrared Survey Explorer (WISE). We show that the SpIES survey recovers a much larger fraction of spectroscopically confirmed quasars (~98%) in Stripe 82 than are recovered by WISE (~55%). This depth is especially powerful at high-redshift (z ≥ 3.5), where SpIES recovers 94% of confirmed quasars, whereas WISE only recovers 25%. Here we define the SpIES survey parameters and describe the image processing, source extraction, and catalog production methods used to analyze the SpIES data. In addition to this survey paper, we release 234 images created by the SpIES team and three detection catalogs: a 3.6 μm only detection catalog containing ~6.1 million sources, a 4.5 μm only detection catalog containing ~6.5 million sources, and a dual-band detection catalog containing ~5.4 million sources.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Ross, Nicholas P.0000-0003-1830-6473
Lacy, Mark0000-0002-3032-1783
Bauer, Franz E.0000-0002-8686-8737
Brandt, W. N.0000-0002-0167-2453
Fan, Xiaohui0000-0003-3310-0131
Glikman, Eilat0000-0003-0489-3750
Haggard, Daryl0000-0001-6803-2138
Jiang, Linhua0000-0003-4176-6486
LaMassa, Stephanie M.0000-0002-5907-3330
McGehee, Peregrine0000-0003-0948-6716
Urry, C. Megan0000-0002-0745-9792
Wollack, Edward J.0000-0002-7567-4451
Additional Information:© 2016 American Astronomical Society. Received 2015 December 23; accepted 2016 March 21; published 2016 June 27. 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 a contract with NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech. We would like to thank Rick Arendt, who computed the Galactic star counts for the SpIES field shown in Figure 13, and Matt Ashby, with whom we consulted about the SpIES number counts and depth. We acknowledge support from CONICYT-Chile grants, Basal-CATA PFB-06/2007 (F.E.B.), FONDECYT Regular 1141218 (F.E.B.), "EMBIGGEN" Anillo ACT1101 (F.E.B.), the Ministry of Economy, Development, and Tourism'(s) Millennium Science Initiative through grant IC120009, awarded to The Millennium Institute of Astrophysics, MAS (F.E.B.), and NASA grant AR3-14015X and the V.M. Willaman Endowment (W.N.B.). N.P.R. acknowledges support from the STFC and the Ernest Rutherford Fellowship scheme. Funding for the SDSS and SDSS-II has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, the U.S. Department of Energy, the National Aeronautics and Space Administration, the Japanese Monbukagakusho, the Max Planck Society, and the Higher Education Funding Council for England. The SDSS website is Funding for SDSS-III has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, and the U.S. Department of Energy Office of Science. The SDSS-III website is Facilities: Spitzer(IRAC), Sloan.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)1141218
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)Anillo ACT1101
Iniciativa Científica Milenio del Ministerio de Economía, Fomento y TurismoIC120009
Science and Technology Facilities Council (STFC)UNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Japanese MonbukagakushoUNSPECIFIED
Max Planck SocietyUNSPECIFIED
Higher Education Funding Council for EnglandUNSPECIFIED
Subject Keywords:catalogs; infrared: general; quasars: general; surveys
Issue or Number:1
Record Number:CaltechAUTHORS:20161104-143424807
Persistent URL:
Official Citation:John D. Timlin et al 2016 ApJS 225 1
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:71749
Deposited By: Ruth Sustaita
Deposited On:07 Nov 2016 20:18
Last Modified:09 Mar 2020 13:19

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