The Extraordinary Glitch Behavior of CCO Pulsar 1E 1207.4-5209

WE HAVE RECENTLY DETECTED A GLITCH IN THE SPIN OF 1E 1207.4-5209 THE COMPACT CENTRAL OBJECT (CCO) IN SNR PKS 1209-51/52. THIS IS ENTIRELY UNEXPECTED FOR A PULSAR WITH A SPIN-DOWN RATE AS SMALL AS THOSE FOUND FOR CCOS. EVEN MORE REMARKABLE IS THE EXTREME CHANGE IN ITS SPIN-DOWN RATE WHICH RIVALS THOSE FOUND FOR MAGNETARS NSS WITH SURFACE MAGNETIC FIELDS 10 000 TIMES GREATER THAN THE DIPOLE FIELDS INFERRED FOR CCOS. THE DETECTION OF A GLITCH THEREFORE SUPPORTS A RECENT CONJECTURE THAT THEY COULD BE TRIGGERED BY THE DIFFUSION OF A BURIED INTERNAL FIELD. WE PROPOSE TO CONTINUE TIMING 1E 1207.4-5209 TO VERIFY THE UNEXPECTED LARGE CHANGE IN ITS POST-GLITCH SPIN-DOWN RATE. THESE OBSERVATIONS MAY ALLOW A FIRST MEASUREMENT OF NS SURFACE