The spitzer deep, wide-field survey
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The Spitzer Deep, Wide-Field Survey (SDWFS) is a four-epoch infrared survey of 10 deg2 in the Boötes field of the NOAO Deep Wide-Field Survey using the IRAC instrument on the Spitzer Space Telescope. SDWFS, a Spitzer Cycle 4 Legacy project, occupies a unique position in the area-depth survey space defined by other Spitzer surveys. The four epochs that make up SDWFS permit - for the first time - the selection of infrared-variable and high proper motion objects over a wide field on timescales of years. Because of its large survey volume, SDWFS is sensitive to galaxies out to z ~ 3 with relatively little impact from cosmic variance for all but the richest systems. The SDWFS data sets will thus be especially useful for characterizing galaxy evolution beyond z ~ 1.5. This paper explains the SDWFS observing strategy and data processing, presents the SDWFS mosaics and source catalogs, and discusses some early scientific findings. The publicly released, full-depth catalogs contain 6.78, 5.23, 1.20, and 0.96 × 105 distinct sources detected to the average 5s, 4?-diameter, aperture-corrected limits of 19.77, 18.83, 16.50, and 15.82 Vega mag at 3.6, 4.5, 5.8, and 8.0µm, respectively. The SDWFS number counts and color-color distribution are consistent with other, earlier Spitzer surveys. At the 6 minute integration time of the SDWFS IRAC imaging, >50% of isolated Faint Images of the Radio Sky at Twenty cm radio sources and >80% of on-axis XBoötes sources are detected out to 8.0µm. Finally, we present the four highest proper motion IRAC-selected sources identified from the multi-epoch imaging, two of which are likely field brown dwarfs of mid-T spectral class. © 2009. The American Astronomical Society. All rights reserved.
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Kozlowski, S.; Kochanek, C.; Stern, D.; Ashby, M.; Assef, R.; Bock, J.; Borys, C.; Brand, K.; Brodwin, M.; Brown, M.; Cool, R.; Cooray, A.; Croft, S.; Dey, A.; Eisenhardt, P.; Gonzalez, A.; Gorjian, V.; Griffith, R.; Grogin, N.; Ivison, R.; Jacob, J.; Jannuzi, B.; Mainzer, A.; Moustakas, L.; Röttgering, H.; Seymour, Nick; Smith, H.; Stanford, S.; Stauffer, J.; Sullivan, I.; Van Breugel, W.; Willner, S.; Wright, E. (2010)We use the multi-epoch, mid-infrared Spitzer Deep Wide-Field Survey to investigate the variability of objects in 8.1 deg2 of the NOAO Deep Wide Field Survey Boötes field. We perform a Difference Image Analysis of the four ...
Symeonidis, M.; Page, M.; Seymour, Nick; Dwelly, T.; Coppin, K.; McHardy, I.; Rieke, G.; Huynh, M. (2009)We show that the far-IR properties of distant Luminous and UltraLuminous InfraRed Galaxies (LIRGs and ULIRGs, respectively) are on average divergent from analogous sources in the local Universe. Our analysis is based on ...
Deep Australia telescope large area survey radio observations of the European large area ISO survey S1/Spitzer wide-area infrared extragalactic fieldMiddelberg, E.; Norris, R.; Cornwell, T.; Voronkov, M.; Siana, B.; Boyle, B.; Ciliegi, P.; Jackson, Carole; Huynh, M.; Berta, S.; Rubele, S.; Lonsdale, C.; Ivison, R.; Smail, I. (2008)We have conducted sensitive (1s < 30µJy) 1.4 GHz radio observations with the Australia Telescope Compact Array of a field largely coincident with infrared observations of the Spitzer Wide-Area Extragalactic Survey. The ...