MACS J1931.8-2635 galaxy cluster AstroLensPy lens model

Galaxy cluster MACS J1931.8-2635, located at z = 0.35, is a massive, relaxed, strong lensing galaxy cluster. In Allingham et al. 2026, we publish the first JWST-updated lens model of the cluster, using software AstroLensPy (Allingham et al. 2026). In this repository, we publish in free access the lens model, including the maps of the lensing potential (Lens_Pot), deflection angles (Alpha_x, Alpha_y), magnification, convergence, shear (Mu, Kappa, Gamma1 and Gamma2), and associated errors (Standard deviation, Average +/- 1 sigma - l1sigma_*, u1sigma_*). All values requiring a source redshift (such as magnification) are computed for a source redshift zs = 5.079, following the 'anchor' redshift described in the Readme. More magnification maps are available for redshifts zs = 1, 2, 3, 4, 5, 5.13, 6, 9, 10, 15, 20. We also supply region files of the critical lines in 'Critics'. We moreover add the MACS J1931.8-2635 stiff.tif image we used for our AstroLensPy run, and a catalogue of RA, Dec coordinates of the multiple images (all 19 systems, and an additional candidate system, see "m1931_AstroLensPy_v2.1_arcs_WCS.txt"). A catalogue with other known spectroscopic redshifts on the field is also provided. The confidence flag is as follows: "0" for unknown confidence, "2" is possible but untrustwoirthy a priori, "3" and "4" for good and very good confience (resp.) and "6" for stars. Moreover, we provide the catalogue of the galaxies 'm1931_AstroLensPy_cluster_members_wfc3_f160w_WCS.txt', including the WFC3/F160W magnitude.