First Detection of X-Ray Polarization from the Accreting Neutron Star 4U 1820โ303
First Detection of X-Ray Polarization from the Accreting Neutron Star 4U 1820โ303
Abstract This paper reports the first detection of polarization in the X-rays for atoll-source 4U 1820โ303, obtained with the Imaging X-ray Polarimetry Explorer (IXPE) at 99.999% confidence level (CL). Simultaneous polarimetric measurements were also performed in the radio with the Australia Telescope Compact Array. The IXPE observations of 4U 1820โ303 โฆ