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Table 2.
Priors on mass model parameters.
| Model component | Parameter | Description | Prior |
|---|---|---|---|
| γ | Power-law slope | Flat prior: [1.5, 2.5] | |
| Main deflector (P0) | θE, P1 | Einstein radius | Flat prior: [0.01, 10.] |
| mass profile | xmass (″) | Centroid x-coordinate | Flat prior: [–10., 10.] |
| (SPEMD) | ymass (″) | Centroid y-coordinate | Flat prior: [–10., 10.] |
| e1 | Eccentricity in x-direction | Flat prior: [–0.5, 0.5] | |
| e2 | Eccentricity in y-direction | Flat prior: [–0.5, 0.5] | |
| αr0 (″) | Deflection angle | Flat prior: [0., 10.] | |
| Main deflector (P0) | r0 (″) | Scale radius | Gaussian prior: [26.82, 3.70] |
| mass profile | on top of flat prior: [8.32, 45.32] | ||
| (NFW) | xmass (″) | Centroid x-coordinate | Flat prior: [–10., 10.] |
| ymass (″) | Centroid y-coordinate | Flat prior: [–10., 10.] | |
| α1 (″) | Deflection angle | Flat prior: [0., 10.] | |
| I0, Cham1/I0, Cham2 | Ratio of deflection amplitudes | Flat prior: [0., 100.] | |
| wc, Cham1 (″) | Core size of component 1 | Flat prior: [0.001, 10.] | |
| Main deflector (P0) | wt, Cham1 (″) | Core size of component 2 | Flat prior: [0.001, 10.] |
| mass profile | e1, Cham1 | Eccentricity in x-direction | Flat prior: [–0.5, 0.5] |
| (Double | e2, Cham1 | Eccentricity in y-direction | Flat prior: [–0.5, 0.5] |
| chameleon) | wc, Cham2 (″) | Core size of component 1 | Flat prior: [0.001, 10.] |
| wt, Cham2 (″) | Core size of component 2 | Flat prior: [0.001, 10.] | |
| e1, Cham2 | Eccentricity in x-direction | Flat prior: [–0.5, 0.5] | |
| e2, Cham2 | Eccentricity in y-direction | Flat prior: [–0.5, 0.5] | |
| External shear | γext, 1, γext, 2 | Shear components | Flat prior: [–0.5, 0.5] |
| P1 mass (SIS) | θE, P1 | Einstein radius | Flat prior: [0.01, 10.] |
| P2 mass (SIS) | θE, P2 | Einstein radius | Gaussian prior: [1.35, 0.16] |
| P3 mass (SIS) | θE, P3 | Einstein radius | Gaussian prior: [1.60, 0.20] |
| P5 mass (SIS) | θE, P5 | Einstein radius | Gaussian prior: [0.58, 0.07] |
| P6 mass (SIS) | θE, P6 | Einstein radius | Gaussian prior: [0.40, 0.05] |
Notes. For Gaussian priors, the numbers in the bracket shown the mean, followed by the standard deviation, while for flat priors the bracket reflects the respective lower and upper bounds.
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