J/A+A/620/A51 WIRCam Ultra Deep Survey photometric catalogs (Pello+, 2018)
The WIRCam Ultra Deep Survey (WUDS).
I. Survey overview and UV luminosity functions at z∼5 and z∼6.
Pello R., Hudelot P., Laporte N., Mellier Y., McCracken H.J., Balcells M.,
Boone F., Cardiel N., Gallego J., Garzon F., Guzman R., Le Borgne J.F.,
Prieto M., Richard J., Schaerer D., Tresse L., Arnouts S., Cuby J.G.,
Disseau K., Hayes M.
<Astron. Astrophys. 620, A51 (2018)>
=2018A&A...620A..51P 2018A&A...620A..51P (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Galaxies, photometry ; Photometry, infrared ;
Photometry, SDSS
Keywords: surveys - galaxies: high-redshift - dark ages - reionization -
first stars
Abstract:
The aim of this paper is to introduce the WIRCam Ultra Deep Survey
(WUDS), a near-IR photometric survey carried out at the CFH Telescope
in the field of the CFHTLS-D3 field (Groth Strip). WUDS includes four
near-IR bands (Y, J, H and Ks) over a field of view of ∼400arcmin2.
The typical depth of WUDS data reaches between ∼26.8 in Y and J, and
∼26 in H and Ks (AB, 3σ in 1.3" aperture), whereas the
corresponding depth of the CFHTLS-D3 images in this region ranges
between 28.6 and 29 in ugr, 28.2 in i and 27.1 in z (same S/N and
aperture). The area and depth of this survey were specifically
tailored to set strong constraints on the cosmic star formation rate
and the luminosity function brighter or around L* in the z∼6-10
redshift domain, although these data are also useful for a variety of
extragalactic projects. This first paper is intended to present the
properties of the public WUDS survey in details: catalog building,
completeness and depth, number counts, photometric redshifts, and
global properties of the galaxy population. We have also concentrated
on the selection and characterization of galaxy samples at z~[4.5-7]
in this field. For these purposes, we include an adjacent shallower
area of ∼1260arcmin2 in this region, extracted from the WIRCam Deep
Survey (WIRDS), and observed in J, H and Ks bands. UV luminosity
functions were derived at z∼5 and z∼6 taking advantage from the fact
that WUDS covers a particularly interesting regime at intermediate
luminosities, which allows a combined determination of M* and {PHI}*
with increased accuracy. Our results on the luminosity function are
consistent with a small evolution of both M* and {PHI}* between z=5
and z=6, irrespective of the method used to derive them, either
photometric redshifts applied to blindly-selected dropout samples or
the classical Lyman Break Galaxy color-preselected samples. Our
results lend support to higher {PHI}* determinations at z=6 than
usually reported. The selection and combined analysis of different
galaxy samples at z≥7 will be presented in a forthcoming paper, as
well as the evolution of the UV luminosity function between z∼4.5 and
9. WUDS is intended to provide a robust database in the near-IR for
the selection of targets for detailed spectroscopic studies, in
particular for the EMIR/GTC GOYA Survey.
Description:
Observations were carried out with WIRCam at the Canada France Hawaii
Telescope. WIRCam
(http://www.cfht.hawaii.edu/Instruments/Imaging/WIRCam/) is a
wide-field near-IR camera with four HAWAII2-RG detectors, 2048x2048
pixels each, and a pixel scale of 0.306". The total WIRCam field of
view is 21.5'x21.5', with a gap of 45" between adjacent detectors.
WUDS was carried out on the CFHTLS-D3 (Groth Strip), on a field
centered around RA=14:18:15.3, DE=+52:38:45 (J2000), in order to avoid
the presence of bright stars while maximizing the coverage by other
surveys, in particular the DEEP Groth Strip Survey (Vogt et al., 2005,
Cat. J/ApJS/159/41; Weiner et al., 2005ApJ...620..595W 2005ApJ...620..595W) and the AEGIS
Survey (Davis et al., 2007ApJ...660L...1D 2007ApJ...660L...1D, http://aegis.ucolick.org).
The WUDS pointing was chosen in such a way that observations could be
combined with public CFHTLS-Deep data on this field, obtained through
five bands in the optical domain, namely u*, g, r, i, and z (see
TERAPIX, http://terapix.iap.fr).
To built the final catalogs, WUDS data were combined with public
CFHTLS-Deep data on this field, obtained through five bands in the
optical domain, namely u*, g, r, i, and z. Therefore, WUDS catalogs
include nine filter bands with full wavelength coverage between ∼0.35
and 2.3um.
A background mesh of 64 pixels was used for background subtraction.
Magnitudes and fluxes were measured in all images with the SExtractor
"double-image" mode using the corresponding detection images
(i+z, Y+J or H+Ks). Total magnitudes and fluxes were computed based on
SExtractor MAG_AUTO magnitudes. Also aperture magnitudes were derived
within 14 different apertures ranging from 1.3 to 5" diameter, on
the original images, and also on images matched to the u*-band seeing
using a simple Gaussian convolution. Photometric errors were measured
using the typical background variance of the original images (without
any seeing matching or rescaling), within apertures of the same
physical size as for flux measurements (either aperture or MAG_AUTO
magnitudes). Errors in colors were derived by quadratically adding the
corresponding errors in magnitude.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
refhkcat.dat 212 1350944 WUDS Reference catalog H+K
refizcat.dat 212 764990 WUDS Reference catalog i+z
refyjcat.dat 212 1259571 WUDS Reference catalog Y+J
list.dat 78 4 List of fits images
fits/* . 4 Individual images
hk-jcat.dat 1768 1350944 HK J-band catalog
hk-hcat.dat 1768 1350944 HK H-band catalog
hk-kscat.dat 1768 1350944 HK Ks-band catalog
hk-ycat.dat 1768 1350944 HK Y-band catalog
hk-ucat.dat 1768 1350944 HK u-band catalog
hk-gcat.dat 1768 1350944 HK g-band catalog
hk-rcat.dat 1768 1350944 HK r-band catalog
hk-icat.dat 1768 1350944 HK i-band catalog
hk-zcat.dat 1768 1350944 HK z-band catalog
iz-jcat.dat 1768 764990 IZ J-band catalog
iz-hcat.dat 1768 764990 IZ H-band catalog
iz-kscat.dat 1768 764990 IZ Ks-band catalog
iz-ycat.dat 1768 764990 IZ Y-band catalog
iz-ucat.dat 1768 764990 IZ u-band catalog
iz-gcat.dat 1768 764990 IZ g-band catalog
iz-rcat.dat 1768 764990 IZ r-band catalog
iz-icat.dat 1768 764990 IZ i-band catalog
iz-zcat.dat 1768 764990 IZ z-band catalog
yj-hcat.dat 1768 1259571 YJ H-band catalog
yj-jcat.dat 1768 1259571 YJ J-band catalog
yj-kscat.dat 1768 1259571 YJ Ks-band catalog
yj-ycat.dat 1768 1259571 YJ Y-band catalog
yj-ucat.dat 1768 1259571 YJ u-band catalog
yj-gcat.dat 1768 1259571 YJ g-band catalog
yj-rcat.dat 1768 1259571 YJ r-band catalog
yj-icat.dat 1768 1259571 YJ i-band catalog
yj-zcat.dat 1768 1259571 YJ z-band catalog
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See also:
http://wuds.irap.omp.eu : WUDS Home Page
Byte-by-byte Description of file: refhkcat.dat refizcat.dat refyjcat.dat
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Bytes Format Units Label Explanations
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1- 7 I7 --- Id Designation
9- 15 F7.4 mag umag ?=99 u* magnitude (AB) (1)
17- 23 F7.4 mag gmag ?=99 g magnitude (AB) (1)
25- 31 F7.4 mag rmag ?=99 r magnitude (AB) (1)
33- 39 F7.4 mag imag ?=99 i magnitude (AB) (1)
41- 47 F7.4 mag zmag ?=99 z magnitude (AB) (1)
49- 55 F7.4 mag Ymag ?=-1 Y magnitude (AB) (1)
57- 63 F7.4 mag Jmag ?=-1 J magnitude (AB) (1)
65- 71 F7.4 mag Hmag ?=-1 H magnitude (AB) (1)
73- 79 F7.4 mag Ksmag ?=-1 Ks magnitude (AB) (1)
81- 91 E11.8 mag e_umag ?=99 Error on u* magnitude
93-103 E11.8 mag e_gmag ?=99 Error on g magnitude
105-115 E11.8 mag e_rmag ?=99 Error on r magnitude
117-127 E11.8 mag e_imag ?=99 Error on i magnitude
129-139 E11.8 mag e_zmag ?=99 Error on z magnitude
141-151 E11.8 mag e_Ymag ?=99 Error on Y magnitude
153-163 E11.8 mag e_Jmag ?=99 Error on J magnitude
165-175 E11.8 mag e_Hmag ?=99 Error on H magnitude
177-187 E11.8 mag e_Ksmag ?=99 Error on Ks magnitude
189-207 A19 --- Pos XIMAGE,YIMAGE object position
209-212 F4.2 --- S/G SExtractor star/galaxy flag
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Note (1): 99.00 means "object not detected";
-1 means "object not measured - out-of-image or no-information
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Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 24 F5.3 arcsec/pix scale [0.186] Scale of the image
26- 30 I5 --- Nx [19354] Number of pixels along X-axis
32- 36 I5 --- Ny [19354] Number of pixels along Y-axis
38- 44 I7 Kibyte size [1463203] Size of FITS file
46- 57 A12 --- FileName Name of FITS file, in subdirectory fits
59- 78 A20 --- Title Title of the FITS file
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Byte-by-byte Description of file: hk*.dat iz*.dat yj*.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 I7 --- Id Running object number (NUMBER)
9- 17 F9.3 pix Ximg Object position along x (X_IMAGE)
19- 27 F9.3 pix Yimg Object position along y (Y_IMAGE)
29- 34 F6.4 pix e_Aimg [] RMS position error along major
axis (ERRA_IMAGE)
36- 41 F6.4 pix e_Bimg [] RMS position error along minor
axis (ERRB_IMAGE)
43- 47 F5.1 deg e_PAimg [] Error ellipse position angle
(CCW/x) (ERRthe_IMAGE)
49- 55 F7.3 pix Aimg Profile RMS along major axis
(A_IMAGE)
56- 62 F7.3 pix Bimg Profile RMS along minor axis
(B_IMAGE)
64- 70 F7.5 --- Polimg (Aimg2-Bima2)/(Aimg2+BimaG2^)
(POLAR_IMAGE)
72- 76 F5.1 deg PAimg [] Position angle (CCW/x)
(the_IMAGE)
78- 93 E16.11 deg Xworld Barycenter position along world x
axis (X_WORLD)
95- 110 E16.11 deg Yworld Barycenter position along world y
axis (Y_WORLD)
112- 123 E12.7 deg e_Aworld [] World RMS position error along
major axis (ERRA_WORLD)
125- 136 E12.7 deg e_Bworld [] World RMS position error along
minor axis (ERRB_WORLD)
138- 142 F5.1 deg e_PAworld [] Error ellipse pos. angle
(CCW/world-x) (ERRTHETA_WORLD)
144- 155 E12.7 deg Aworld Profile RMS along major axis
(world units) (A_WORLD)
157- 168 E12.7 deg Bworld Profile RMS along minor axis
(world units) (B_WORLD)
170- 176 F7.5 --- Polworld (AWld2-BWld2)/(AWld2+BWld2)
(POLAR_WORLD)
178- 182 F5.1 deg PAworld [] Position angle (CCW/world-x)
(THETA_WORLD)
184- 194 F11.7 deg RAdeg Right ascension of barycenter
(J2000) (ALPHA_J2000)
196- 206 F11.7 deg DEdeg Declination of barycenter (J2000)
(DELTA_J2000)
208- 212 F5.1 deg e_PA [] error ellipse pos. angle
(east of north) (ERRTHETA_J2000)
214- 219 F6.2 deg PA [] Position angle (east of north)
(J2000) (THETA_J2000)
220- 232 F13.3 pix XWimg Windowed position estimate along x
(XWIN_IMAGE)
234- 245 F12.3 pix YWimg Windowed position estimate along y
(YWIN_IMAGE)
247- 254 E8.3 pix e_AWimg []?=- RMS windowed pos error along
major axis (ERRAWIN_IMAGE)
256- 263 E8.3 pix e_BWimg []?=- RMS windowed pos error along
minor axis (ERRBWIN_IMAGE)
265- 269 F5.1 deg e_PAWimg [] Windowed error ellipse pos angle
(CCW/x) (ERRTHETAWIN_IMAGE)
271- 278 E8.3 pix AWimg ?=- Windowed profile RMS along
major axis (AWIN_IMAGE)
280- 286 E7.2 pix BWimg ?=- Windowed profile RMS along
minor axis (BWIN_IMAGE)
288- 294 E7.2 --- PolAimg ?=- (AW2-BW2)/(AW2+BW^2)
(POLARWIN_IMAGE)
296- 300 F5.1 deg PAWimg []?=- Windowed position angle
(CCW/x) (THETAWIN_IMAGE)
302- 317 E16.11 deg XWworld Windowed position along world x
axis (XWIN_WORLD)
319- 335 E17.12 deg YWworld Windowed position along world y
axis (YWIN_WORLD)
337- 348 E12.7 deg e_AWworld []?=- World RMS windowed pos error
along major axis (ERRAWIN_WORLD)
350- 361 E12.7 deg e_BWworld []?=- World RMS windowed pos error
along minor axis (ERRBWIN_WORLD)
363- 367 E5.1 deg e_PAWworld []?=- Windowed error ellipse pos.
angle (CCW/world-x)
(ERRTHETAWIN_WORLD)
369- 380 E12.7 deg AWworld ?=- Windowed profile RMS along
major axis (world units)
(AWIN_WORLD)
382- 393 E12.7 deg BWworld ?=- Windowed profile RMS along
minor axis (world units)
(BWIN_WORLD)
395- 401 E7.3 --- PolWworld ?=- (AW2-BW2)/(AW2+BW2)
(POLARWIN_WORLD)
403- 407 E5.1 deg PAWworld []?=- Windowed position angle
(CCW/world-x) (THETAWIN_WORLD)
409- 419 F11.7 deg RAWdeg Windowed right ascension (J2000)
(ALPHAWIN_J2000)
421- 431 F11.7 deg DEWdeg windowed declination (J2000)
(DELTAWIN_J2000)
433- 437 E5.1 deg e_PAW []?=- J2000 windowed error ellipse
pos. angle (east of north)
(ERRTHETAWIN_J2000)
439- 444 E6.1 deg PAW []?=- Windowed position angle
(east of north) (J2000)
(THETAWIN_J2000)
446- 458 E13.8 ct FluxISO Isophotal flux (FLUX_ISO)
460- 471 E12.7 ct e_FluxISO [] RMS error for isophotal flux
(FLUXERR_ISO)
473- 479 F7.4 mag magISO ?=99 Isophotal magnitude (MAG_ISO)
481- 509 F29.4 mag e_magISO []?=99 RMS error for isophotal
magnitude (MAGERR_ISO)
510- 789 20E14.8 ct FluxAPer Flux vector within fixed circular
aperture(s) (FLUX_APER)
790-1069 20E14.8 ct e_FluxAPer [] RMS error vector for aperture
flux(es) (FLUXERR_APER)
1070-1229 20F8.4 mag magAper Fixed aperture magnitude vector
(MAG_APER)
1230-1509 20F14.4 mag e_magAper [] RMS error vector for fixed
aperture mag. (MAGERR_APER)
1511-1523 E13.7 ct FluxAuto Flux within a Kron-like elliptical
aperture (FLUX_AUTO)
1525-1537 F13.7 ct e_FluxAuto [] RMS error for AUTO flux
(FLUXERR_AUTO)
1539-1545 F7.4 mag magAuto Kron-like elliptical aperture
magnitude (MAG_AUTO)
1547-1558 F12.4 mag e_magAuto []?=99 RMS error for AUTO magnitude
(MAGERR_AUTO)
1560-1572 E13.7 ct FluxPetro Flux within a Petrosian-like
elliptical aperture (FLUX_PETRO)
1574-1586 F13.7 ct e_FluxPetro [] RMS error for PETROsian flux
(FLUXERR_PETRO)
1588-1594 F7.4 mag magPetro ?=99 Petrosian-like elliptical
aperture magnitude (MAG_PETRO)
1596-1607 F12.4 mag e_magPetro []?=99 RMS error for PETROsian
magnitude (MAGERR_PETRO)
1608-1652 3F15.3 pix FluxRad Fraction-of-light radii
(FLUX_RADIUS)
1654-1659 F6.2 --- KronRad ?=0 Kron apertures in units of
A or B (KRON_RADIUS)
1661-1666 F6.2 --- PetroRad ?=0 Petrosian apertures in units of
A or B (PETRO_RADIUS)
1668-1680 E13.7 ct Bgk Background at centroid position
(BACKGROUND)
1682-1692 F11.7 ct Det Detection threshold above
background (THRESHOLD)
1694-1700 F7.4 mag/arcsec+2 muDet Detection threshold above
background (MU_THRESHOLD)
1702-1714 E13.7 ct FluxMax Peak flux above background
(FLUX_MAX)
1716-1722 F7.4 mag/arcsec+2 muMax ?=99 Peak surface brightness
above background (MU_MAX)
1723-1728 E6.1 pix+2 ISOAreaImg Isophotal area above Analysis
threshold (ISOAREA_IMAGE)
1729-1734 E6.1 pix+2 ISOAreaFimg Isophotal area (filtered) above
Detection threshold
(ISOAREAF_IMAGE)
1736-1747 E12.7 deg+2 ISOAreaworld ? Isophotal area above Analysis
threshold (ISOAREA_WORLD)
1749-1760 E12.7 deg+2 ISOAreaFworld Isophotal area (filtered) above
Detection threshold
(ISOAREAF_WORLD)
1761-1763 A3 --- Flags Extraction flags (FLAGS)
1765-1768 F4.2 --- S/G S/G classifier output (CLASS_STAR)
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History:
Copied at http://wuds.irap.omp.eu/
(End) Patricia Vannier [CDS] 28-Nov-2018