Monitoring the Spectrum and Spin of the CCO Pulsar in Puppis A

We measured spindown of the pulsar in Puppis A, which indicates a dipolemagnetic field of only 2.8E10 G, the smallest of any young neutron star. PSRJ08214300 also has an Xray spectral feature that is either an emission line at0.75 keV or an absorption line at 0.46 keV. Either are consistent with electroncyclotron resonance at roughly the spindown magnetic field strength. However,the strength and energy of the line are apparently variable in time. We proposeto monitor the spectrum to test for further variability of the magnetic field.The simultaneous timing will also test for correlated torque noise that could beindicative of accretion of supernova debris, the most plausible mechanism forgenerating an emission line. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]