Long-Term Radio Timing Observations of the Transition Millisecond Pulsar PSR~J1023+0038

Understand

The radio millisecond pulsar PSR J1023+0038 exhibits complex timing and eclipse behavior.

• Here we analyze four years' worth of radio monitoring observations of this object.
• We obtain a long-term timing solution, albeit with large residual timing errors as a result of apparent orbital period variations.
• We also observe variable eclipses when the companion passes near our line of sight, excess dispersion measure near the eclipses and at random orbital phases, and short-term disappearances of signal at random orbital phases.