X-Ray Polarimetry of the Crab Nebula with PolarLight: Polarization Recovery after the Glitch and a Secular Position Angle Variation

Abstract We report follow-up observations of the Crab Nebula with PolarLight X-ray polarimeter, which revealed a possible variation in polarization associated pulsar glitch 2019. The new confirm that has recovered roughly 100 days after glitch. With observations, we find angle (PA) measured from total nebular emission difference 18.°0 ± 4.°6 42 yr ago OSO-8, indicating secular evolution either or pulsar. long-term PA could be result multiple glitches history, magnetic reconnection, movement synchrotron emitting structures nebula, geometry.