The continued spectral and temporal evolution of RX J0720.4-3125

  title={The continued spectral and temporal evolution of RX J0720.4-3125},
  author={Markus Matthias Hohle and Frank Haberl and Jacco Vink and Cor P. de Vries and Roberto Turolla and Silvia Zane and Mariano M'endez},
  journal={Monthly Notices of the Royal Astronomical Society},
RX J0720.4-3125 is the most peculiar object among a group of seven isolated X-ray pulsars (the so-called Magnificent Seven), since it shows long-term variations of its spectral and temporal properties on time-scales of years. This behaviour was explained by different authors either by free precession (with a 7 or 14 yr period) or possibly a glitch that occurred around MJD = 528 66 +/- 73 d. We analysed our most recent XMMNewton and Chandra observations in order to further monitor the behaviour… 

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