J/MNRAS/464/3369 SCUBA-2 EGS deep field (Zavala+, 2017)
The SCUBA-2 Cosmology Legacy Survey: the EGS deep field.
I. Deep number counts and the redshift distribution of the recovered cosmic
infrared background at 450 and 850 µ m.
Zavala J.A., Aretxaga I., Geach J.E., Hughes D.H., Birkinshaw M.,
Chapin E., Chapman S., Chen C.-C., Clements D.L., Dunlop J.S., Farrah D.,
Ivison R.J., Jenness T., Michalowski M.J., Robson E.I., Scott D.,
Simpson J., Spaans M., Van Der Werf P.
<Mon. Not. R. Astron. Soc., 464, 3369-3384 (2017)>
=2017MNRAS.464.3369Z 2017MNRAS.464.3369Z (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Galaxies, photometry ; Photometry, millimetric/submm
Keywords: galaxies: evolution - galaxies: high-redshift -
cosmology: observations - submillimetre: galaxies
Abstract:
We present deep observations at 450 and 850µm in the Extended Groth
Strip field taken with the SCUBA-2 camera mounted on the James Clerk
Maxwell Telescope as part of the deep SCUBA-2 Cosmology Legacy Survey
(S2CLS), achieving a central instrumental depth of
σ450=1.2mJy/beam and σ850=0.2mJy/beam. We detect 57
sources at 450µm and 90 at 850µm with signal-to-noise ratio >3.5
over ∼70arcmin2. From these detections, we derive the number counts
at flux densities S450>4.0mJy and S850>0.9mJy, which represent the
deepest number counts at these wavelengths derived using directly
extracted sources from only blank-field observations with a
single-dish telescope. Our measurements smoothly connect the gap
between previous shallower blank-field single-dish observations and
deep interferometric ALMA results. We estimate the contribution of our
SCUBA-2 detected galaxies to the cosmic infrared background (CIB), as
well as the contribution of 24µm-selected galaxies through a
stacking technique, which add a total of 0.26±0.03 and
0.07±0.01MJy/sr, at 450 and 850µm, respectively. These surface
brightnesses correspond to 60±20 and 50±20 per cent of the total
CIB measurements, where the errors are dominated by those of the total
CIB. Using the photometric redshifts of the 24µm-selected sample
and the redshift distributions of the submillimetre galaxies, we find
that the redshift distribution of the recovered CIB is different at
each wavelength, with a peak at z∼1 for 450µm and at z∼2 for
850µm, consistent with previous observations and theoretical
models.
Description:
Observations at 450 and 850um were taken, simultaneously, with the
SCUBA-2 camera on the JCMT between 2012 and 2015 under the best
weather conditions (band 1, τ225GHz<0.05) as part of the deep
S2CLS in the extragalactic EGS field.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 77 92 EGS/SCUBA-2 450um source candidates
tablea2.dat 79 108 EGS/SCUBA-2 850um source candidates
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See also:
J/A+A/526/A72 : Early-type galaxies in the EGS (Fernandez Lorenzo+, 2011)
J/AJ/132/2159 : IRAC counterparts of 6cm galaxies in EGS (Willner+, 2006)
J/ApJ/717/1181 : Spitzer power-law galaxies in EGS (Park+, 2010)
J/ApJ/758/135 : DEEP2 galaxies with UV spectra in the EGS (Kornei+, 2012)
J/ApJS/177/431 : Mid-IR sources in EGS (Barmby+, 2008)
J/ApJS/193/13 : Spitzer/IRAC sources in the EGS I. SEDs (Barro+, 2011)
J/ApJS/193/30 : UV-to-FIR analysis of sources in the EGS. II. (Barro+, 2011)
J/ApJS/220/10 : AEGIS-X Deep survey of EGS (AEGIS-XD) (Nandra+, 2015)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- Name SCUBA-2 source name (S2CLS-EGS-450.NNN)
18- 19 I2 h RAh 450um right ascension (J2000)
21- 22 I2 min RAm 450um right ascension (J2000)
24- 28 F5.2 s RAs 450um right ascension (J2000)
30 A1 --- DE- 450um declination sign (J2000)
31- 32 I2 deg DEd 450um declination (J2000)
34- 35 I2 arcmin DEm 450um declination (J2000)
37- 41 F5.2 arcsec DEs 450um declination (J2000)
43- 46 F4.1 --- S/N850 450um signal-to-noise ratio
48- 51 F4.1 mJy/beam S450 Measured raw 450um flux density
53- 55 F3.1 mJy/beam e_S450 rms uncertainty on S450
57- 60 F4.1 mJy/beam S450d1 Deboosted flux density estimated through
Monte Carlo simulations
62- 64 F3.1 mJy/beam e_S450d1 rms uncertainty on S450d1
66- 69 F4.1 mJy/beam S450d2 Deboosted flux density estimated through
the Bayesian approach
71- 73 F3.1 mJy/beam E_S450d2 Error of 68% interval on S450d2 (upper value)
75- 77 F3.1 mJy/beam e_S450d2 Error of 68% interval on S450d2 (lower value)
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Name SCUBA-2 source name (S2CLS-EGS-850.NNN)
19- 20 I2 h RAh 850um right ascension (J2000)
22- 23 I2 min RAm 850um right ascension (J2000)
25- 30 F6.3 s RAs 850um right ascension (J2000)
31 A1 --- DE- 850um declination sign (J2000)
32- 33 I2 deg DEd 850um declination (J2000)
35- 36 I2 arcmin DEm 850um declination (J2000)
38- 42 F5.2 arcsec DEs 850um declination (J2000)
44- 47 F4.1 --- S/N850 850um signal-to-noise ratio
49- 52 F4.2 mJy/beam S850 Measured raw 850um flux density
54- 57 F4.2 mJy/beam e_S850 rms uncertainty on S850
59- 62 F4.2 mJy/beam S850d1 Deboosted flux density estimated through
Monte Carlo simulations
64- 67 F4.2 mJy/beam e_S850d1 rms uncertainty on S850d1
69- 71 F3.1 mJy/beam S850d2 Deboosted flux density estimated through
the Bayesian approach
73- 75 F3.1 mJy/beam E_S850d2 Error of 68% interval on S850d2 (upper value)
77- 79 F3.1 mJy/beam e_S850d2 Error of 68% interval on S850d2 (lower value)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 25-May-2018