Posterior Samples and Model Curve Data for Bayesian Geometrical Modeling of IXPE Polarization Angle Curves of the Magnetars 1E 2259+586 and 1E 1547.0−5408

The deposited data mainly include Bayesian posterior samples obtained from geometrical modeling of the phase-resolved X-ray polarization position-angle curves of the magnetars 1E 2259+586 and 1E 1547.0−5408, together with selected numerical model-curve data.For 1E 2259+586, the dataset includes posterior samples for the classical rotating vector model (CRVM) and the modified rotating vector model (MRVM) incorporating a first-order magnetospheric twist correction.

For 1E 1547.0−5408, the dataset includes posterior samples from the flat-prior CRVM and MRVM analyses, represented using the parameter branch adopted in the published paper. Numerical model-curve data corresponding to Figure 3, including the radio-fixed model curves, are also provided.The phase-resolved IXPE polarization measurements used as model inputs were adopted from previously published studies, and the original IXPE event files were not reprocessed in this work.