Unveiling the nature of cyclic behavior in the period evolution of XTEJ1810-197

The program is aimed at obtaining a phasecoherent timing solution for theperiod evolution of XTEJ181097 (XTE),continuing the successful Xray monitoringof this unique Anomalous Xray Pulsar (AXP).XTE is a transient magnetar, aneutron star (NS) whose quiescent emission is likely due to the decay of anextremely strong magnetic field (10e15 G).Previous analysis suggested a longterm precession (2100 d) of the source spin axis.The pointings we request areaimed at studying the period evolution of XTE and prove the long termprecession.XTE could be a unique precessing NS.The effective presence oflongterm precession could shed light on the physical properties of the NScrust/core, thus, on the physical properties of extremely high density matter truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]