The measured positions of the various components used for lens modelling, as indicated in Figs 4 and 5. The observed relative RA and Dec are determined by performing elliptical Gaussian fits using jmfit within aips, and are measured with respect to component A1 (phased referenced absolute position 07h51m41.487s, +27°16′31.621′). The position of component D7 is the model-predicted position. The predicted positions from the lens models tested here are also relative to the observed position of component A1. The peak surface brightness (mJy beam−1) is given as a reference, and is not used as a constraint for the lens models. The reported error on the peak surface brightness is the nominal error of the Gaussian fit.
| ID . | Observed . | Model 1 . | Model 2 . | I . | |||
|---|---|---|---|---|---|---|---|
| . | α (mas) . | δ (mas) . | α (mas) . | δ (mas) . | α (mas) . | δ (mas) . | (mJy beam−1) . |
| A1 | 0.00 ± 0.01 | 0.00 ± 0.02 | −3.27 | +2.86 | −2.64 | +2.56 | 4.91 ± 0.63 |
| A2 | +6.87 ± 0.02 | +35.60 ± 0.20 | +2.05 | +27.86 | +1.28 | +29.81 | 2.29 ± 0.67 |
| A3 | +9.99 ± 0.02 | +20.29 ± 0.10 | +12.81 | +21.78 | +11.34 | +24.63 | 2.27 ± 0.08 |
| A4 | +47.50 ± 0.07 | +21.50 ± 1.00 | +52.89 | +37.59 | +64.14 | +26.02 | 0.67 ± 0.02 |
| B1 | −493.31 ± 0.01 | −279.25 ± 0.03 | −487.28 | −277.09 | −485.34 | −279.18 | 2.78 ± 0.22 |
| B2 | −414.61 ± 0.03 | −298.87 ± 0.03 | −410.23 | −292.15 | −413.28 | −294.04 | 1.20 ± 0.02 |
| B3 | −379.66 ± 0.04 | −302.01 ± 0.20 | −382.89 | −298.69 | −387.79 | −300.46 | 1.20 ± 0.03 |
| B4 | −261.65 ± 0.02 | −304.10 ± 0.04 | −262.34 | −306.69 | −262.03 | −308.44 | 1.96 ± 0.18 |
| B6 | −58.30 ± 0.30 | −318.10 ± 0.40 | −58.35 | −320.85 | −60.34 | −321.27 | 0.11 ± 0.01 |
| B7 | −164.37 ± 0.01 | −300.44 ± 0.05 | −163.19 | −299.46 | −162.94 | −301.33 | 1.24 ± 0.06 |
| C1 | −81.45 ± 0.01 | +501.27 ± 0.02 | −83.00 | +501.61 | −86.97 | +499.99 | 3.25 ± 0.23 |
| C2 | −29.85 ± 0.02 | +451.82 ± 0.13 | −25.68 | +456.31 | −26.95 | +451.90 | 1.53 ± 0.05 |
| C3 | −5.82 ± 0.03 | +424.10 ± 0.01 | −2.31 | +426.19 | −2.98 | +421.22 | 1.44 ± 0.05 |
| C4 | +59.50 ± 0.01 | +278.50 ± 0.80 | +84.93 | +242.38 | +85.21 | +215.30 | 0.68 ± 0.05 |
| D1 | −643.05 ± 0.02 | +346.88 ± 0.03 | −649.74 | +346.88 | −649.57 | +350.76 | 2.48 ± 0.38 |
| D2 | −639.02 ± 0.02 | +328.94 ± 0.05 | −643.21 | +328.32 | −644.16 | +326.69 | 1.97 ± 0.12 |
| D3 | −639.23 ± 0.02 | +329.81 ± 0.05 | −635.49 | +327.41 | −636.86 | +326.23 | 2.04 ± 0.09 |
| D4 | −607.80 ± 0.02 | +321.78 ± 0.02 | −606.77 | +316.33 | −607.30 | +315.49 | 1.53 ± 0.12 |
| D6 | −503.82 ± 0.03 | +290.59 ± 0.04 | −510.54 | +291.12 | −509.35 | +283.97 | 0.52 ± 0.02 |
| D7 | −574.03 | +302.87 | −574.03 | +302.87 | −574.03 | +302.87 | <0.01 |
| ID . | Observed . | Model 1 . | Model 2 . | I . | |||
|---|---|---|---|---|---|---|---|
| . | α (mas) . | δ (mas) . | α (mas) . | δ (mas) . | α (mas) . | δ (mas) . | (mJy beam−1) . |
| A1 | 0.00 ± 0.01 | 0.00 ± 0.02 | −3.27 | +2.86 | −2.64 | +2.56 | 4.91 ± 0.63 |
| A2 | +6.87 ± 0.02 | +35.60 ± 0.20 | +2.05 | +27.86 | +1.28 | +29.81 | 2.29 ± 0.67 |
| A3 | +9.99 ± 0.02 | +20.29 ± 0.10 | +12.81 | +21.78 | +11.34 | +24.63 | 2.27 ± 0.08 |
| A4 | +47.50 ± 0.07 | +21.50 ± 1.00 | +52.89 | +37.59 | +64.14 | +26.02 | 0.67 ± 0.02 |
| B1 | −493.31 ± 0.01 | −279.25 ± 0.03 | −487.28 | −277.09 | −485.34 | −279.18 | 2.78 ± 0.22 |
| B2 | −414.61 ± 0.03 | −298.87 ± 0.03 | −410.23 | −292.15 | −413.28 | −294.04 | 1.20 ± 0.02 |
| B3 | −379.66 ± 0.04 | −302.01 ± 0.20 | −382.89 | −298.69 | −387.79 | −300.46 | 1.20 ± 0.03 |
| B4 | −261.65 ± 0.02 | −304.10 ± 0.04 | −262.34 | −306.69 | −262.03 | −308.44 | 1.96 ± 0.18 |
| B6 | −58.30 ± 0.30 | −318.10 ± 0.40 | −58.35 | −320.85 | −60.34 | −321.27 | 0.11 ± 0.01 |
| B7 | −164.37 ± 0.01 | −300.44 ± 0.05 | −163.19 | −299.46 | −162.94 | −301.33 | 1.24 ± 0.06 |
| C1 | −81.45 ± 0.01 | +501.27 ± 0.02 | −83.00 | +501.61 | −86.97 | +499.99 | 3.25 ± 0.23 |
| C2 | −29.85 ± 0.02 | +451.82 ± 0.13 | −25.68 | +456.31 | −26.95 | +451.90 | 1.53 ± 0.05 |
| C3 | −5.82 ± 0.03 | +424.10 ± 0.01 | −2.31 | +426.19 | −2.98 | +421.22 | 1.44 ± 0.05 |
| C4 | +59.50 ± 0.01 | +278.50 ± 0.80 | +84.93 | +242.38 | +85.21 | +215.30 | 0.68 ± 0.05 |
| D1 | −643.05 ± 0.02 | +346.88 ± 0.03 | −649.74 | +346.88 | −649.57 | +350.76 | 2.48 ± 0.38 |
| D2 | −639.02 ± 0.02 | +328.94 ± 0.05 | −643.21 | +328.32 | −644.16 | +326.69 | 1.97 ± 0.12 |
| D3 | −639.23 ± 0.02 | +329.81 ± 0.05 | −635.49 | +327.41 | −636.86 | +326.23 | 2.04 ± 0.09 |
| D4 | −607.80 ± 0.02 | +321.78 ± 0.02 | −606.77 | +316.33 | −607.30 | +315.49 | 1.53 ± 0.12 |
| D6 | −503.82 ± 0.03 | +290.59 ± 0.04 | −510.54 | +291.12 | −509.35 | +283.97 | 0.52 ± 0.02 |
| D7 | −574.03 | +302.87 | −574.03 | +302.87 | −574.03 | +302.87 | <0.01 |
The measured positions of the various components used for lens modelling, as indicated in Figs 4 and 5. The observed relative RA and Dec are determined by performing elliptical Gaussian fits using jmfit within aips, and are measured with respect to component A1 (phased referenced absolute position 07h51m41.487s, +27°16′31.621′). The position of component D7 is the model-predicted position. The predicted positions from the lens models tested here are also relative to the observed position of component A1. The peak surface brightness (mJy beam−1) is given as a reference, and is not used as a constraint for the lens models. The reported error on the peak surface brightness is the nominal error of the Gaussian fit.
| ID . | Observed . | Model 1 . | Model 2 . | I . | |||
|---|---|---|---|---|---|---|---|
| . | α (mas) . | δ (mas) . | α (mas) . | δ (mas) . | α (mas) . | δ (mas) . | (mJy beam−1) . |
| A1 | 0.00 ± 0.01 | 0.00 ± 0.02 | −3.27 | +2.86 | −2.64 | +2.56 | 4.91 ± 0.63 |
| A2 | +6.87 ± 0.02 | +35.60 ± 0.20 | +2.05 | +27.86 | +1.28 | +29.81 | 2.29 ± 0.67 |
| A3 | +9.99 ± 0.02 | +20.29 ± 0.10 | +12.81 | +21.78 | +11.34 | +24.63 | 2.27 ± 0.08 |
| A4 | +47.50 ± 0.07 | +21.50 ± 1.00 | +52.89 | +37.59 | +64.14 | +26.02 | 0.67 ± 0.02 |
| B1 | −493.31 ± 0.01 | −279.25 ± 0.03 | −487.28 | −277.09 | −485.34 | −279.18 | 2.78 ± 0.22 |
| B2 | −414.61 ± 0.03 | −298.87 ± 0.03 | −410.23 | −292.15 | −413.28 | −294.04 | 1.20 ± 0.02 |
| B3 | −379.66 ± 0.04 | −302.01 ± 0.20 | −382.89 | −298.69 | −387.79 | −300.46 | 1.20 ± 0.03 |
| B4 | −261.65 ± 0.02 | −304.10 ± 0.04 | −262.34 | −306.69 | −262.03 | −308.44 | 1.96 ± 0.18 |
| B6 | −58.30 ± 0.30 | −318.10 ± 0.40 | −58.35 | −320.85 | −60.34 | −321.27 | 0.11 ± 0.01 |
| B7 | −164.37 ± 0.01 | −300.44 ± 0.05 | −163.19 | −299.46 | −162.94 | −301.33 | 1.24 ± 0.06 |
| C1 | −81.45 ± 0.01 | +501.27 ± 0.02 | −83.00 | +501.61 | −86.97 | +499.99 | 3.25 ± 0.23 |
| C2 | −29.85 ± 0.02 | +451.82 ± 0.13 | −25.68 | +456.31 | −26.95 | +451.90 | 1.53 ± 0.05 |
| C3 | −5.82 ± 0.03 | +424.10 ± 0.01 | −2.31 | +426.19 | −2.98 | +421.22 | 1.44 ± 0.05 |
| C4 | +59.50 ± 0.01 | +278.50 ± 0.80 | +84.93 | +242.38 | +85.21 | +215.30 | 0.68 ± 0.05 |
| D1 | −643.05 ± 0.02 | +346.88 ± 0.03 | −649.74 | +346.88 | −649.57 | +350.76 | 2.48 ± 0.38 |
| D2 | −639.02 ± 0.02 | +328.94 ± 0.05 | −643.21 | +328.32 | −644.16 | +326.69 | 1.97 ± 0.12 |
| D3 | −639.23 ± 0.02 | +329.81 ± 0.05 | −635.49 | +327.41 | −636.86 | +326.23 | 2.04 ± 0.09 |
| D4 | −607.80 ± 0.02 | +321.78 ± 0.02 | −606.77 | +316.33 | −607.30 | +315.49 | 1.53 ± 0.12 |
| D6 | −503.82 ± 0.03 | +290.59 ± 0.04 | −510.54 | +291.12 | −509.35 | +283.97 | 0.52 ± 0.02 |
| D7 | −574.03 | +302.87 | −574.03 | +302.87 | −574.03 | +302.87 | <0.01 |
| ID . | Observed . | Model 1 . | Model 2 . | I . | |||
|---|---|---|---|---|---|---|---|
| . | α (mas) . | δ (mas) . | α (mas) . | δ (mas) . | α (mas) . | δ (mas) . | (mJy beam−1) . |
| A1 | 0.00 ± 0.01 | 0.00 ± 0.02 | −3.27 | +2.86 | −2.64 | +2.56 | 4.91 ± 0.63 |
| A2 | +6.87 ± 0.02 | +35.60 ± 0.20 | +2.05 | +27.86 | +1.28 | +29.81 | 2.29 ± 0.67 |
| A3 | +9.99 ± 0.02 | +20.29 ± 0.10 | +12.81 | +21.78 | +11.34 | +24.63 | 2.27 ± 0.08 |
| A4 | +47.50 ± 0.07 | +21.50 ± 1.00 | +52.89 | +37.59 | +64.14 | +26.02 | 0.67 ± 0.02 |
| B1 | −493.31 ± 0.01 | −279.25 ± 0.03 | −487.28 | −277.09 | −485.34 | −279.18 | 2.78 ± 0.22 |
| B2 | −414.61 ± 0.03 | −298.87 ± 0.03 | −410.23 | −292.15 | −413.28 | −294.04 | 1.20 ± 0.02 |
| B3 | −379.66 ± 0.04 | −302.01 ± 0.20 | −382.89 | −298.69 | −387.79 | −300.46 | 1.20 ± 0.03 |
| B4 | −261.65 ± 0.02 | −304.10 ± 0.04 | −262.34 | −306.69 | −262.03 | −308.44 | 1.96 ± 0.18 |
| B6 | −58.30 ± 0.30 | −318.10 ± 0.40 | −58.35 | −320.85 | −60.34 | −321.27 | 0.11 ± 0.01 |
| B7 | −164.37 ± 0.01 | −300.44 ± 0.05 | −163.19 | −299.46 | −162.94 | −301.33 | 1.24 ± 0.06 |
| C1 | −81.45 ± 0.01 | +501.27 ± 0.02 | −83.00 | +501.61 | −86.97 | +499.99 | 3.25 ± 0.23 |
| C2 | −29.85 ± 0.02 | +451.82 ± 0.13 | −25.68 | +456.31 | −26.95 | +451.90 | 1.53 ± 0.05 |
| C3 | −5.82 ± 0.03 | +424.10 ± 0.01 | −2.31 | +426.19 | −2.98 | +421.22 | 1.44 ± 0.05 |
| C4 | +59.50 ± 0.01 | +278.50 ± 0.80 | +84.93 | +242.38 | +85.21 | +215.30 | 0.68 ± 0.05 |
| D1 | −643.05 ± 0.02 | +346.88 ± 0.03 | −649.74 | +346.88 | −649.57 | +350.76 | 2.48 ± 0.38 |
| D2 | −639.02 ± 0.02 | +328.94 ± 0.05 | −643.21 | +328.32 | −644.16 | +326.69 | 1.97 ± 0.12 |
| D3 | −639.23 ± 0.02 | +329.81 ± 0.05 | −635.49 | +327.41 | −636.86 | +326.23 | 2.04 ± 0.09 |
| D4 | −607.80 ± 0.02 | +321.78 ± 0.02 | −606.77 | +316.33 | −607.30 | +315.49 | 1.53 ± 0.12 |
| D6 | −503.82 ± 0.03 | +290.59 ± 0.04 | −510.54 | +291.12 | −509.35 | +283.97 | 0.52 ± 0.02 |
| D7 | −574.03 | +302.87 | −574.03 | +302.87 | −574.03 | +302.87 | <0.01 |
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