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Table A.1.

Marginalized parameter values with 1σ (68% CI) uncertainties for the light distribution of the Cosmic Horseshoe lens.

Sersic 1 Sersic 2

Parameter Best-fit value Marginalized value Best-fit value Marginalized value
x [″] 10.9985 10.9985
y [″] 9.6237 9.6237
q 1.00000 0.556
θ [rad] 1.528 1.528
A 0.2031 23.72
reff 4.33 0.2552
n 5.0000 1.235

Notes. This model includes two Sersic profiles for the lens galaxy (with Cartesian coordinates x and y for the center with respect to the image cutout, and parameters q as axis ratio, θ as position angle measured counterclockwise from the x-axis, A as amplitude, reff as effective radius, and n as Sersic index).

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