The Green Bank North Celestial Cap Pulsar Survey. IV: Four New Timing Solutions

Understand

We present timing solutions for four pulsars discovered in the Green Bank Northern Celestial Cap (GBNCC) survey.

• All four pulsars are isolated with spin periods between 0.26$\,$s and 1.84$\,$s.
• PSR J0038$-$2501 has a 0.26$\,$s period and a period derivative of ${7.6} \times {10}^{-19}\,{\rm s\,s}^{-1}$, which is unusually low for isolated pulsars with similar periods.
• This low period derivative may be simply an extreme value for an isolated pulsar or it could indicate an unusual evolution path for PSR J0038$-$2501, such as a disrupted recycled pulsar (DRP) from a binary system or an orphaned central compact object (CCO).