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Table 5

Error budget on FH.

System FH(1011FH, ⊙) σ rand σ sky σ xs σ ys σ Is σ reff σ arc Total error

MG0414+0534 3.505 0.083 0.340 0.398 0.375 0.379 0.372 N.A. 0.839
HE0435-1223 1.391 0.029 0.092 0.080 0.080 0.079 0.071 0.088 0.203
RXJ0911+0551 1.872 0.024 0.030 0.001 0.009 0.007 0.017 N.A. 0.044
SDSS0924+0219 0.877 0.005 0.074 0.075 0.077 0.077 0.072 0.043 0.173
PG1115+080 0.761 0.004 0.032 0.035 0.035 0.032 0.035 0.051 0.091
SDSS1138+0314 0.641 0.011 0.018 0.022 0.023 0.023 0.025 0.055 0.075
B1422+231 0.322 0.006 0.041 0.043 0.038 0.045 0.042 N.A. 0.094

Notes. From left to right: dispersion, sky subtraction, positions and intensities of the sources, measurement of reff, and subtraction of the arc. N.A. stands for “not applicable”.

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