NICER observation list: Target ID 559305

Magnetars are young highly-magnetized isolated neutron stars with emission peaking in the X-ray band. The decay of their super-strong magnetic fields fuels their high energy radiation. Here, we propose a yearly monitoring program of six magnetars with NICER to establish their spectral and phase-coherent timing properties. Such a campaign will refine our understanding of these unique sources by discovering new glitches and revealing their relative strengths and recovery times, identifying new spin-down glitch events, and revealing magnetars burst and outburst activity. In the process, we will also refine our knowledge on magnetars variability and the correlations between the spectral and temporal properties in quiescence and in outburst.