J/ApJ/701/428 The Spitzer Deep, Wide-Field Survey (SDWFS) (Ashby+, 2009)
The Spitzer Deep, Wide-Field Survey.
Ashby M.L.N., Stern D., Brodwin M., Griffith R., Eisenhardt P.,
Kozlowski S., Kochanek C.S., Bock J.J., Borys C., Brand K., Brown M.J.I.,
Cool R., Cooray A., Croft S., Dey A., Eisenstein D., Gonzalez A.H.,
Gorjian V., Grogin N.A., Ivison R.J., Jacob J., Jannuzi B.T., Mainzer A.,
Moustakas L.A., Rottgering H.J.A., Seymour N., Smith H.A., Stanford S.A.,
Stauffer J.R., Sullivan I., van Breugel W., Willner S.P., Wright E.L.
<Astrophys. J., 701, 428-453 (2009)>
=2009ApJ...701..428A 2009ApJ...701..428A
ADC_Keywords: Photometry, infrared ; Surveys
Keywords: infrared: galaxies - infrared: stars - surveys
Abstract:
The Spitzer Deep, Wide-Field Survey (SDWFS) is a four-epoch infrared
survey of 10deg2 in the Bootes 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 0.96x105 distinct
sources detected to the average 5σ, 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 8.0um, 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 XBootes sources are detected out to 8.0um.
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.
Description:
The SDWFS observing campaign consisted of four co-extensive surveys of
the 8.5deg2 Bootes field, carried out over roughly 4yr. "Epoch one",
with the original ISS (IRAC Shallow Survey; PID 30; Eisenhardt et al.
2004ApJS..154...48E 2004ApJS..154...48E) in 2004 Jan 10-14 was followed by three other
epoch: 2007 Aug 8-13, 2008 Feb 2-6 and 2008 Mar 6-10.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table6.dat 220 677522 SDWFS Four-Epoch, 3.6um-selected source catalog
table7.dat 220 523350 SDWFS Four-Epoch, 4.5um-selected source catalog
table8.dat 220 120259 SDWFS Four-Epoch, 5.8um-selected source catalog
table9.dat 220 96176 SDWFS Four-Epoch, 8.0um-selected source catalog
table10.dat 220 435295 SDWFS First-Epoch, 3.6um-selected source catalog
table11.dat 220 316922 SDWFS First-Epoch, 4.5um-selected source catalog
table12.dat 220 40859 SDWFS First-Epoch, 5.8um-selected source catalog
table13.dat 220 38314 SDWFS First-Epoch, 8.0um-selected source catalog
table14.dat 220 470176 SDWFS Second-Epoch, 3.6um-selected source catalog
table15.dat 220 341220 SDWFS Second-Epoch, 4.5um-selected source catalog
table16.dat 220 43482 SDWFS Second-Epoch, 5.8um-selected source catalog
table17.dat 220 40151 SDWFS Second-Epoch, 8.0um-selected source catalog
table18.dat 220 482313 SDWFS Third-Epoch, 3.6um-selected source catalog
table19.dat 220 354016 SDWFS Third-Epoch, 4.5um-selected source catalog
table20.dat 220 44568 SDWFS Third-Epoch, 5.8um-selected source catalog
table21.dat 220 42596 SDWFS Third-Epoch, 8.0um-selected source catalog
table22.dat 220 484861 SDWFS Fourth-Epoch, 3.6um-selected source catalog
table23.dat 220 354063 SDWFS Fourth-Epoch, 4.5um-selected source catalog
table24.dat 220 43208 SDWFS Fourth-Epoch, 5.8um-selected source catalog
table25.dat 220 41840 SDWFS Fourth-Epoch, 8.0um-selected source catalog
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See also:
J/ApJ/716/530 : Mid-IR variability from the SDWFS (Kozlowski+, 2010)
J/ApJ/701/508 : 5000 AGNs behind the Magellanic clouds (Kozlowski+, 2009)
J/ApJ/684/905 : z>1 galaxy clusters from IRAC Shallow Survey (Eisenhardt+,
2008)
J/ApJ/641/140 : Optical counterparts in the NDWFS Bootes field (Brand+, 2006)
J/ApJ/634/L1 : 16µm sources in the NOAO Bootes field (Kasliwal+, 2005)
J/AJ/130/923 : Faint radio sources in the NOAO Bootes field (Wrobel+, 2005)
J/ApJS/161/9 : X-ray survey of the NDWFS Bootes field (Kenter+, 2005)
J/AJ/127/213 : LALA Bootes field X-ray source catalog (Wang+, 2004)
J/AJ/123/1784 : 1.4 GHz imaging of the Bootes field (de Vries+, 2002)
Byte-by-byte Description of file: table1[0-9].dat table2[0-9].dat table[6-9].dat
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Bytes Format Units Label Explanations
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1- 11 F11.7 deg RAdeg Right Ascension in decimal degrees (J2000)
13- 23 F11.7 deg DEdeg Declination in decimal degrees (J2000)
25- 31 F7.4 mag [3.6]4 ?=99 The 4" diameter aperture-corrected 3.6um
band magnitude (1)
33- 39 F7.4 mag [4.5]4 ?=99 The 4" diameter aperture-corrected 4.5um
band magnitude (1)
41- 47 F7.4 mag [5.8]4 ?=99 The 4" diameter aperture-corrected 5.8um
band magnitude (1)
49- 55 F7.4 mag [8.0]4 ?=99 The 4" diameter aperture-corrected 8.0um
band magnitude (1)
57- 63 F7.4 mag e_[3.6]4 ?=99 Error in 3.6mag4 (2)
65- 71 F7.4 mag e_[4.5]4 ?=99 Error in 4.5mag4 (2)
73- 79 F7.4 mag e_[5.8]4 ?=99 Error in 5.8mag4 (2)
81- 87 F7.4 mag e_[8.0]4 ?=99 Error in 8.0mag4 (2)
89- 95 F7.4 mag [3.6]6 ?=99 The 6" diameter aperture-corrected 3.6um
band magnitude (1)
97-103 F7.4 mag [4.5]6 ?=99 The 6" diameter aperture-corrected 4.5um
band magnitude (1)
105-111 F7.4 mag [5.8]6 ?=99 The 6" diameter aperture-corrected 5.8um
band magnitude (1)
113-119 F7.4 mag [8.0]6 ?=99 The 6" diameter aperture-corrected 8.0um
band magnitude (1)
121-127 F7.4 mag e_[3.6]6 ?=99 Error in 3.6mag6 (2)
129-135 F7.4 mag e_[4.5]6 ?=99 Error in 4.5mag6 (2)
137-143 F7.4 mag e_[5.8]6 ?=99 Error in 5.8mag6 (2)
145-151 F7.4 mag e_[8.0]6 ?=99 Error in 8.0mag6 (2)
153-159 F7.4 mag [3.6] ?=99 SExtractor MAG_AUTO 3.6um band magnitude (1)
161-167 F7.4 mag [4.5] ?=99 SExtractor MAG_AUTO 4.5um band magnitude (1)
169-175 F7.4 mag [5.8] ?=99 SExtractor MAG_AUTO 5.8um band magnitude (1)
177-183 F7.4 mag [8.0] ?=99 SExtractor MAG_AUTO 8.0um band magnitude (1)
185-191 F7.4 mag e_[3.6] ?=99 Error in 3.6mag (2)
193-199 F7.4 mag e_[4.5] ?=99 Error in 4.5mag (2)
201-207 F7.4 mag e_[5.8] ?=99 Error in 5.8mag (2)
209-215 F7.4 mag e_[8.0] ?=99 Error in 8.0mag (2)
217-220 I4 --- Flag [0,27] SExtractor flag output
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Note (1): Vega-relative magnitude. Entries equal to 99 indicate the source lies
below the 5σ detection limit.
Note (2): Errors are measurement errors only and do not account for any
systematic errors. Entries equal to 99 indicate the source lies
below the 5σ detection limit.
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Nomenclature Notes:
Tables 6-9: sources are <[ASB2009] SDWFS N.N DDD.ddddddd+DD.ddddddd> in the
dictionary of nomenclature.
History:
From electronic version of the journal
References:
Kozlowski et al. Paper II. 2010ApJ...716..530K 2010ApJ...716..530K Cat. J/ApJ/716/530
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 12-Aug-2011