J/ApJS/209/22 SSDF survey: IRAC catalogs (Ashby+, 2013)
The Spitzer South Pole Telescope Deep Field: survey design and Infrared Array
Camera catalogs.
Ashby M.L.N., Stanford S.A., Brodwin M., Gonzalez A.H., Martinez-Manso J.,
Bartlett J.G., Benson B.A., Bleem L.E., Crawford T.M., Dey A., Dressler A.,
Eisenhardt P.R.M., Galametz A., Jannuzi B.T., Marrone D.P., Mei S.,
Muzzin A., Pacaud F., Pierre M., Stern D., Vieira J.D.
<Astrophys. J. Suppl. Ser., 209, 22 (2013)>
=2013ApJS..209...22A 2013ApJS..209...22A
ADC_Keywords: Photometry, infrared ; Surveys ; Galaxies, IR
Keywords: catalogs - galaxies: clusters: general - infrared: galaxies - surveys
Abstract:
The Spitzer South Pole Telescope Deep Field (SSDF) is a wide-area
survey using Spitzer's Infrared Array Camera (IRAC) to cover 94deg2
of extragalactic sky, making it the largest IRAC survey completed to
date outside the Milky Way midplane. The SSDF is centered at
(α,δ)=(23:30, -55:00), in a region that combines
observations spanning a broad wavelength range from numerous
facilities. These include millimeter imaging from the South Pole
Telescope (SPT), far-infrared observations from Herschel/SPIRE, X-ray
observations from the XMM XXL survey, near-infrared observations from
the VISTA Hemisphere Survey, and radio-wavelength imaging from the
Australia Telescope Compact Array, in a panchromatic project designed
to address major outstanding questions surrounding galaxy clusters and
the baryon budget. Here we describe the Spitzer/IRAC observations of
the SSDF, including the survey design, observations, processing,
source extraction, and publicly available data products. In
particular, we present two band-merged catalogs, one for each of the
two warm IRAC selection bands. They contain roughly 5.5 and 3.7
million distinct sources, the vast majority of which are galaxies,
down to the SSDF 5σ sensitivity limits of 19.0 and 18.2 Vega mag
(7.0 and 9.4uJy) at 3.6 and 4.5um, respectively.
Description:
We carried out our survey in a field that benefits from an abundance
of supporting data from X-ray to radio wavelengths, and which has
extremely low levels of Galactic dust emission, being among the
cleanest 1% of contiguous 100deg2 regions on the sky as measured in
the 100um IRAS map (Finkbeiner et al. 1999ApJ...524..867F 1999ApJ...524..867F). See
section 2 for further details.
The SSDF was covered by Astronomical Observation Requests (AORs)
having coverage footprints of various (sometimes irregular) shapes and
sizes. Although the four-AOR observations of specific areas were
performed consecutively, spacecraft visibility constraints meant that
coverage of the full SSDF had to be accumulated in separate campaigns
spaced roughly six months apart. These took place in 2011 July-August,
2012 January-February, 2012 July-September, and 2012 December-2013
February. See section 3 for further explanations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table6a.dat 433 5488166 SPT-Spitzer photometry catalog of sources detected
in the 3.6µm band at a threshold of 5σ
table6b.dat 433 3689182 SPT-Spitzer photometry catalog of sources detected
in the 4.5µm band at a threshold of 5σ
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See also:
II/295 : Spitzer IRAC survey of the galactic center (Ramirez+, 2008)
J/AJ/141/1 : Spitzer observations of GOODS fields (Teplitz+, 2011)
J/ApJS/193/13 : Spitzer/IRAC sources in the EGS I. SEDs (Barro+, 2011)
J/ApJ/719/763 : Millimeter-wave sources in the SPT survey (Vieira+, 2010)
J/ApJ/716/530 : Mid-IR variability from the SDWFS (Kozlowski+, 2010)
J/A+A/517/A44 : Spitzer sources in the Galactic bulge (Uttenthaler+, 2010)
J/ApJ/705/68 : A Spitzer ultradeep survey (SUUSS) (Bertincourt+, 2009)
J/ApJ/703/1778 : Spitzer sources in SWIRE/XMM/ELAIS-S1 field (Sacchi+, 2009)
J/ApJ/686/966 : Spitzer-FLS catalog of clusters of galaxies (Muzzin+, 2008)
J/ApJ/685/958 : Spitzer and Chandra sources in galactic center (Arendt+ 2008)
J/ApJ/684/905 : IRAC Shallow Survey z>1 galaxy clusters (Eisenhardt+, 2008)
J/AJ/105/1860 : 2-35 micron point source IR sky model (Cohen, 1993)
http://irsa.ipac.caltech.edu/data/SPITZER/SSDF/ : SSDF from the IRSA pages
Byte-by-byte Description of file: table6[ab].dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [SSDF]
5- 7 F3.1 --- Tile [0/4.5] SSDF sub-tile of origin (SSDFN.N)
9- 17 F9.3 pix Xpos Object position along X (X_IMAGE)
19- 26 F8.3 pix Ypos Object position along Y (Y_IMAGE)
28- 38 F11.6 deg RAdeg Barycenter Right Ascension (J2000)(ALPHA_J2000)
40- 50 F11.6 deg DEdeg Barycenter Declination (J2000) (DELTA_J2000)
52- 58 F7.2 --- rKron [0/11] Kron aperture in units of a.im or b.im
(KRON_RADIUS)
60- 70 F11.7 ct bg Background at centroid position (BACKGROUND)
72- 83 F12.4 pix fRad ?=-99 Fraction-of-light radius (FLUX_RADIUS)
85- 95 F11.6 deg RAp.deg Brightest pixel Right Ascension (J2000)
(ALPHAPEAK_J2000)
97-107 F11.6 deg DEp.deg Brightest pixel Declination (J2000)
(DELTAPEAK_J2000)
109-120 F12.4 pix2 Xvar Variance along X (X2_IMAGE)
122-133 F12.4 pix2 Yvar Variance along Y (Y2_IMAGE)
135-146 F12.4 pix2 XYcov Covariance between X and Y (XY_IMAGE)
148-154 F7.3 pix a.im Profile RMS along major axis (A_IMAGE)
156-162 F7.3 pix b.im Profile RMS along minor axis (B_IMAGE)
164-169 F6.2 deg PAim [-90/90] Position angle (THETA_IMAGE) (1)
171-182 F12.10 deg a Profile RMS along major axis (A_WORLD)
184-195 E12.6 deg b Profile RMS along minor axis (B_WORLD)
197-202 F6.1 deg PA [-90/90] Position angle (THETA_WORLD) (1)
204-207 F4.2 --- S/G [0/1] Star/Galaxy classifier output
(1=star, 0=galaxy) (CLASS_STAR)
209-211 I3 --- fSE [0/80] SExtractor flag (FLAGS)
213-218 F6.2 mag [3.6] [5/39]?=-99 Kron-like elliptical aperture
Spitzer/IRAC 3.6µm magnitude (MAG_AUTO)
220-225 F6.2 mag e_[3.6] [0.03/6]?=-99 RMS error in [3.6] (MAGERR_AUTO)
227-232 F6.2 mag [3.6]4 [5/21]?=-99 4"-diameter aperture 3.6µm
magnitude (MAG_APER)
234-239 F6.2 mag e_[3.6]4 ?=-99 RMS error in [3.6]4 (MAGERR_APER)
241-246 F6.2 mag [3.6]6 [5/21]?=-99 6"-diameter aperture 3.6µm
magnitude (MAG_APER)
248-253 F6.2 mag e_[3.6]6 ?=-99 RMS error in [3.6]6 (MAGERR_APER)
255-265 F11.2 uJy F3.6 ?=-99 Kron-like elliptical aperture 3.6µm
flux (FLUX_AUTO)
267-276 F10.2 uJy e_F3.6 ?=-99 RMS error in Flux (FLUXERR_AUTO)
278-288 F11.2 uJy F3.6-4 ?=-99 The 4" diameter aperture flux (FLUX_APER)
290-299 F10.2 uJy e_F3.6-4 ?=-99 RMS error in 4-3.6Flux (FLUXERR_APER)
301-311 F11.2 uJy F3.6-6 ?=-99 The 6" diameter aperture flux (FLUX_APER)
313-322 F10.2 uJy e_F3.6-6 ?=-99 RMS error in 6-3.6Flux (FLUXERR_APER)
324-329 F6.2 mag [4.5] [4/41]?=-99 Kron-like elliptical aperture
Spitzer/IRAC 4.5µm magnitude (MAG_AUTO)
331-336 F6.2 mag e_[4.5] [0.03/6]?=-99 RMS error in [4.5] (MAGERR_AUTO)
338-343 F6.2 mag [4.5]4 [5/21]?=-99 4"-diameter aperture 4.5µm
magnitude (MAG_APER)
345-350 F6.2 mag e_[4.5]4 ?=-99 RMS error in [4.5]4 (MAGERR_APER)
352-357 F6.2 mag [4.5]6 [5/21]?=-99 6"-diameter aperture 4.5µm
magnitude (MAG_APER)
359-364 F6.2 mag e_[4.5]6 ?=-99 RMS error in [4.5]6 (MAGERR_APER)
366-376 F11.2 uJy F4.5 ?=-99 Kron-like elliptical aperture 4.5µm
flux (FLUX_AUTO)
378-387 F10.2 uJy e_F4.5 ?=-99 RMS error in Flux (FLUXERR_AUTO)
389-399 F11.2 uJy F4.5-4 ?=-99 4"-diameter aperture flux (FLUX_APER)
401-410 F10.2 uJy e_F4.5-4 ?=-99 RMS error in 4-4.5Flux (FLUXERR_APER)
412-422 F11.2 uJy F4.5-6 ?=-99 6"-diameter aperture flux (FLUX_APER)
424-433 F10.2 uJy e_F4.5-6 ?=-99 RMS error in 6-4.5Flux (FLUXERR_APER)
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Note (1): position angles are measured counter-clockwise (CCW) from
the x-axis.
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History:
From electronic version of the journal - 15-Jan-2014 and
SSDF1.20131024.v9.public.cat.gz for table6a provided by the author.
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 15-Jan-2014