On 4/8/24, Astronomy and Astrophysics published online “IXPE observation confirms a high spin in the accreting black hole 4U 1957+115” by Lorenzo Marra et al. This is the 53rd discovery paper published by the IXPE Science Team. On 4/16/24, Astronomy and Astrophysics published online “Discovery of a variable energy-dependent X-ray polarization in the accreting neutron star GX 5−1” by Sergio Fabiani et al. This is the 54th discovery paper published by the IXPE Science Team.
