Extended Data Fig. 1: Observed Stokes spectra of Her X-1.
From: Determination of X-ray pulsar geometry with IXPE polarimetry
The top row shows spectra of the three Stokes parameters I, Q, and U, while the bottom row shows the residuals to the best-fitting model NTHCOMP for intensity and polconst for Q and U). The results for the three detector units are colour-coded, the black points in the first panel show the estimated background level for each detector.
