Discovery of X-Ray Polarization from the Black Hole Transient Swift J1727.8โ1613
Discovery of X-Ray Polarization from the Black Hole Transient Swift J1727.8โ1613
Abstract We report the first detection of the X-ray polarization of the bright transient Swift J1727.8โ1613 with the Imaging X-ray Polarimetry Explorer. The observation was performed at the beginning of the 2023 discovery outburst, when the source resided in the bright hard state. We find a time- and energy-averaged polarization โฆ