NICER observation list: Target ID 251602

We are proposing continued timing of pulsars PSR J1846-0258 and J1838-0655 for a total of 110 ks to maintain phase-connected timing solutions. These pulsars are members of a group of young and energetic rotation-powered pulsars that are both radio and GeV quiet, and therefore must be monitored in X-rays to understand their high-energy spectrum and enigmatic nature. Both have shown large glitches and J1846-0258 had a magnetar-like outburst in 2006. Timing with NICER will to establish a multi-year ephemeris and allow us to improve the significance of our detections of emission with Fermi GBM and LAT, to discriminate between pair creation models in pulsar magnetospheres, to understand weak particle acceleration and glitches in MeV pulsars and to probe the pulsar-magnetar connection.