We report the discovery and timing results for five millisecond pulsars (MSPs) from the Arecibo PALFA survey: PSRs J1906+0055, J1914+0659, J1933+1726, J1938+2516, and J1957+2516. Timing observations of the 5 pulsars were conducted with the Arecibo and Lovell telescopes for time spans ranging from 1.5 to 3.3 yr. All of the MSPs except one (PSR J1914+0659) are in binary systems with low eccentricities. PSR J1957+2516 is likely a redback pulsar, with a ~0.1 M⊙ companion and possible eclipses that last ~10% of the orbit. The position of PSR J1957+2516 is also coincident with a NIR source. All 5 MSPs are distant (>3.1 kpc) as determined from their dispersion measures, and none of them show evidence of γ-ray pulsations in a search of Fermi Gamma-Ray Space Telescope data. These 5 MSPs bring the total number of MSPs discovered by the PALFA survey to 26 and further demonstrate the power of this survey in finding distant, highly dispersed MSPs deep in the Galactic plane.
@article{arxiv.1608.08880,
title = {Timing of Five PALFA-Discovered Millisecond Pulsars},
author = {K. Stovall and B. Allen and S. Bogdanov and A. Brazier and F. Camilo and F. Cardoso and S. Chatterjee and J. M. Cordes and F. Crawford and J. S. Deneva and R. Ferdman and P. C. C. Freire and J. W. T. Hessels and F. Jenet and D. L. Kaplan and C. Karako-Argaman and V. M. Kaspi and B. Knispel and R. Kotulla and P. Lazarus and K. J. Lee and J. van Leeuwen and R. Lynch and A. G. Lyne and E. Madsen and M. A. McLaughlin and C. Patel and S. M. Ransom and P. Scholz and X. Siemens and I. H. Stairs and B. W. Stappers and J. Swiggum and W. W. Zhu and A. Venkataraman},
journal= {arXiv preprint arXiv:1608.08880},
year = {2018}
}