The First Glitch in a CCO Pulsar

CCO pulsars are stable rotators with weak dipole magnetic fields and smallspindown rates. Old radio pulsars with similar spin parameters as CCOs arenever seen to glitch. However, the CCOs are much younger than their timing ages,and we have discovered the first CCO glitch, in our XMM monitoring of 1E1207.45209. CCOs are theorized to have strong, buried crustal magnetic fieldsthat will diffuse out in <1 Myr. Our discovery therefore supports a recentconjecture that glitches could be triggered by the diffusion of strong magneticfields. We need to continue the Xray timing of 1E 1207.45209 postglitch todetermine a definite value for the magnitude of its frequency change, and totest for any change in frequency derivative that could be indicative of growth of its dipole field. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]