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 0.26s and 1.84s. PSR J0038−2501 has a 0.26s period and a period derivative of 7.6×10−19ss−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). Correcting the observed spin-down rate for the Shklovskii effect suggests that this pulsar may have an unusually low space velocity, which is consistent with expectations for DRPs. There is no X-ray emission detected from PSR J0038−2501 in an archival swift observation, which suggests that it is not a young orphaned CCO. The high dispersion measure of PSR J1949+3426 suggests a distance of 12.3kpc. This distance indicates that PSR J1949+3426 is among the most distant 7% of Galactic field pulsars, and is one of the most luminous pulsars.
@article{arxiv.1903.03543,
title = {The Green Bank North Celestial Cap Pulsar Survey. IV: Four New Timing Solutions},
author = {R. J. Aloisi and A. Cruz and L. Daniels and N. Meyers and R. Roekle and A. Schuett and J. K. Swiggum and M. E. DeCesar and D. L. Kaplan and R. S. Lynch and K. Stovall and Lina Levin and A. M. Archibald and S. Banaszak and C. M. Biwer and J. Boyles and P. Chawla and L. P. Dartez and B. Cui and D. F. Day and A. J. Ford and J. Flanigan and E. Fonseca and J. W. T. Hessels and J. Hinojosa and C. Karako-Argaman and V. M. Kaspi and V. I. Kondratiev and S. Leake and G. Lunsford and J. G. Martinez and A. Mata and M. A. McLaughlin and H. Al Noori and S. M. Ransom and M . S. E. Roberts and M. D. Rohr and X. Siemens and R. Spiewak and I. H. Stairs and J. van Leeuwen and A. N. Walker and B. L. Wells},
journal= {arXiv preprint arXiv:1903.03543},
year = {2019}
}