Cosmology with supernova Encore in the strong lensing cluster MACS J0138−2155 - Photometry, cluster members, and lens mass model

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Volume 702 (October 2025)

A&A, 702 (2025) A157

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Table D.1.

Predicted image positions and magnifications of SN Encore and SN Requiem from the baseline lens mass model.

image	x coordinate [″]	y coordinate [″]	magnification

SN Encore predictions (`baseline` model)
1a	$8.41 \pm 0.04$ $\phantom{-}8.41\pm{0.04}$	−16.07 ± 0.01	$- 26 . 6_{- 2.7}^{+ 2.5}$ $-26.6^{+2.5}_{-2.7}$
1b	$0.22 \pm 0.04$ $\phantom{-}0.22\pm{0.04}$	−17.86 ± 0.01	$39 . 6_{- 6.1}^{+ 5.9}$ $\phantom{-}39.6^{+5.9}_{-6.1}$
1c*	$19 . 48_{- 0.04}^{+ 0.03}$ $\phantom{-}19.48^{+0.03}_{-0.04}$	$- 2 . 64_{- 0.09}^{+ 0.10}$ $-2.64^{+0.10}_{-0.09}$	$11 . 0_{- 0.9}^{+ 0.8}$ $\phantom{-}11.0^{+0.8}_{-0.9}$
1d*	$- 6 . 14_{- 0.10}^{+ 0.09}$ $-6.14^{+0.09}_{-0.10}$	$7 . 66_{- 0.09}^{+ 0.07}$ $\phantom{-}7.66^{+0.07}_{-0.09}$	$- 2 . 6_{- 0.7}^{+ 0.5}$ $-2.6^{+0.5}_{-0.7}$
1e*^†	$- 1 . 20_{- 0.41}^{+ 0.27}$ $-1.20^{+0.27}_{-0.41}$	$1 . 70_{- 0.41}^{+ 0.71}$ $1.70^{+0.71}_{-0.41}$	$5 . 3_{- 2.4}^{+ 4.6}$ $\phantom{-}5.3^{+4.6}_{-2.4}$

SN Requiem predictions (`baseline` model)

2a	11.29 ± 0.07	−15.49 ± 0.05	$- 33 . 8_{- 4.2}^{+ 3.5}$ $-33.8^{+3.5}_{-4.2}$
2b	$2 . 01_{- 0.07}^{+ 0.08}$ $2.01^{+0.08}_{-0.07}$	−18.62 ± 0.02	$23.8 \pm 2.3$ $\phantom{-}23.8\pm{2.3}$
2c	18.86 ± 0.03	−6.64 ± 0.08	$14 . 9_{- 1.6}^{+ 1.7}$ $\phantom{-}14.9^{+1.7}_{-1.6}$
2d*	$- 4 . 23_{- 0.25}^{+ 0.28}$ $-4.23^{+0.28}_{-0.25}$	$5 . 80_{- 0.39}^{+ 0.37}$ $5.80^{+0.37}_{-0.39}$	$- 2 . 3_{- 0.7}^{+ 0.4}$ $-2.3^{+0.4}_{-0.7}$

Notes. The coordinates are relative to the BCG that is centred at (x, y) = (0, 0). Lensed images marked by * are model predictions which have not yet been clearly detected, either due to their faintness (image 1c) or due to their long time delays (images 1d, 1e and 2d). Lensed image 1e marked by ^† is predicted by 13% of the models in the baseline MCMC chain; all the other images listed above are predicted by all the models in the chain. Image 2e is not predicted in the baseline model.

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