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Field Parameter u ∗ g r i y z
W1 Nb stacks 72 72 72 56 16 72
Seeing ["] 0.84 ± 0.11 0.77 ± 0.10 0.70 ± 0.07 0.65 ± 0.08 0.66 ± 0.10 0.69 ± 0.13
80% Compl. (stellar) 25.27 ± 0.21 25.52 ± 0.18 25.03 ± 0.16 24.73 ± 0.18 24.82 ± 0.22 23.90 ± 0.26
80% Compl. (extended) 24.45 ± 0.15 24.67 ± 0.14 24.00 ± 0.10 23.69 ± 0.13 23.78 ± 0.20 22.91 ± 0.15
Int. astrom. err. (0.031",0.029") (0.031",0.029") (0.025",0.022") (0.020",0.017") (0.020",0.017") (0.025",0.022")
Ext. astrom. err. (0.237",0.227") (0.254",0.244") (0.259",0.247") (0.252",0.243") (0.272",0.254") (0.260",0.247")
Mag. err. [mag.] 0.05 ± 0.01 0.03 ± 0.01 0.03 ± 0.01 0.03 ± 0.01 0.03 ± 0.01 0.04 ± 0.01
CFHTLS-SDSS 〈δm〉 [mag.] −0.020 ± 0.015 +0.003 ± 0.006 +0.041 ± 0.014 +0.000 ± 0.007 −0.002 ± 0.008 +0.015 ± 0.011
W2 Nb stacks 25 25 25 23 2 25
Seeing ["] 0.88 ± 0.10 0.79 ± 0.08 0.72 ± 0.09 0.64 ± 0.08 0.59 ± 0.05 0.72 ± 0.09
80% Compl. (stellar) 25.16 ± 0.20 25.51 ± 0.18 25.04 ± 0.18 24.81 ± 0.13 24.96 ± 0.15 23.88 ± 0.16
80% Compl. (extended) 24.36 ± 0.17 24.66 ± 0.16 24.00 ± 0.13 23.76 ± 0.10 23.84 ± 0.09 22.94 ± 0.11
Int. astrom. err. (0.024",0.021") (0.024",0.021") (0.024",0.021") (0.024",0.021") (0.024",0.021") (0.024",0.021")
Ext. astrom. err. (0.183",0.186") (0.208",0.211") (0.211",0.213") (0.207",0.210") (0.224",0.228") (0.211",0.212")
Mag. err. [mag.] 0.05 ± 0.01 0.03 ± 0.01 0.03 ± 0.01 0.03 ± 0.01 0.03 ± 0.01 0.04 ± 0.01
CFHTLS-SDSS 〈δm〉 [mag.] −0.040 ± 0.011 −0.008 ± 0.005 +0.007 ± 0.004 −0.007 ± 0.005 – +0.018 ± 0.012
W3 Nb stacks 49 49 49 42 7 42
Seeing ["] 0.85 ± 0.11 0.81 ± 0.09 0.75 ± 0.08 0.66 ± 0.08 0.59 ± 0.08 0.67 ± 0.09
80% Compl. (stellar) 25.20 ± 0.22 25.48 ± 0.16 24.99 ± 0.15 24.67 ± 0.16 24.95 ± 0.15 23.93 ± 0.22
80% Compl. (extended) 24.35 ± 0.21 24.64 ± 0.12 23.98 ± 0.10 23.63 ± 0.12 23.89 ± 0.11 22.92 ± 0.17
Int. astrom. err. (0.036",0.035") (0.036",0.035") (0.036",0.035") (0.036",0.035") (0.036",0.035") (0.036",0.035")
Ext. astrom. err. (0.235",0.225") (0.248",0.242") (0.258",0.249") (0.246",0.242") (0.275",0.269") (0.258",0.250")
Mag. err. [mag.] 0.05 ± 0.01 0.03 ± 0.01 0.03 ± 0.01 0.03 ± 0.01 0.03 ± 0.01 0.04 ± 0.01
CFHTLS-SDSS 〈δm〉 [mag.] −0.012 ± 0.009 +0.003 ± 0.004 +0.010 ± 0.005 −0.013 ± 0.004 +0.000 ± 0.004 +0.001 ± 0.005
W4 Nb stacks 25 25 25 18 7 25
Seeing ["] 0.81 ± 0.11 0.75 ± 0.06 0.67 ± 0.07 0.61 ± 0.07 0.59 ± 0.06 0.64 ± 0.10
80% Compl. (stellar) 25.22 ± 0.21 25.57 ± 0.17 25.02 ± 0.16 24.81 ± 0.19 24.97 ± 0.11 23.91 ± 0.20
80% Compl. (extended) 24.35 ± 0.17 24.71 ± 0.15 23.94 ± 0.12 23.73 ± 0.19 23.88 ± 0.08 22.90 ± 0.13
Int. astrom. err. (0.023",0.020") (0.023",0.020") (0.023",0.020") (0.023",0.020") (0.023",0.020") (0.023",0.020")
Ext. astrom. err. (0.193",0.186") (0.218",0.213") (0.222",0.217") (0.217",0.215") (0.221",0.217") (0.214",0.212")
Mag. err. [mag.] 0.05 ± 0.01 0.03 ± 0.01 0.03 ± 0.01 0.03 ± 0.01 0.03 ± 0.01 0.04 ± 0.01
CFHTLS-SDSS 〈δm〉 [mag.] −0.030 ± 0.009 +0.009 ± 0.003 +0.010 ± 0.007 −0.001 ± 0.006 – +0.022 ± 0.005
Table 6: Summary of the W1, W2, W3 and W4 mean survey parameters. The i and y data have been combined. "80% Compl." is the 80% completeness limit.
The seeing is the median FWHM and the errors is the field-to-field scatter. Astrometric errors are given along the two (X,Y)=(NS,EW) axes. The internal astrometric
errors are from the (global) astrometric calibration errors step; the external astrometric errors are from the (ensemble average) astrometric accuracy of CFHTLS stacks.
The "CFHTLS-SDSS 〈δm〉 mag." denotes the mean magnitude offset between the CFHTLS and the SDSS surveys, averaged over a Wide field. It is derived from a sample of
common stars to both surveys in W1, W3 and W4 (no data for W2). The "Mag. err." is estimated from the external and internal magnitude errors discussed in the
document. For W2, it is based on the internal mag. error and extrapolated from the W1, W3 and W4 CFHTLS-SDSS comparisons.
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