FOUR HIGHLY DISPERSED MILLISECOND PULSARS DISCOVERED IN THE ARECIBO PALFA GALACTIC PLANE SURVEY

@article{Crawford2012FOURHD,
  title={FOUR HIGHLY DISPERSED MILLISECOND PULSARS DISCOVERED IN THE ARECIBO PALFA GALACTIC PLANE SURVEY},
  author={Fronefield Crawford and Kevin Stovall and Andrew G. Lyne and Ben W. Stappers and David J. Nice and Ingrid H. Stairs and Patrick Lazarus and Jason W. T. Hessels and Paulo C. C. Freire and Bruce Allen and N. D. Ramesh Bhat and Slavko Bogdanov and Adam Brazier and Fernando Camilo and David J. Champion and Shami Chatterjee and Ismael Cognard and James M. Cordes and Julia S. Deneva and Gregory Desvignes and Fredrick A. Jenet and Victoria M. Kaspi and Benjamin Knispel and Michael Kramer and Joeri van Leeuwen and Duncan R. Lorimer and Ryan S. Lynch and Maura Mclaughlin and Scott M. Ransom and Paul Scholz and Xavier Siemens and Arun Venkataraman},
  journal={The Astrophysical Journal},
  year={2012},
  volume={757},
  pages={90}
}
We present the discovery and phase-coherent timing of four highly dispersed millisecond pulsars (MSPs) from the Arecibo PALFA Galactic plane survey: PSRs J1844+0115, J1850+0124, J1900+0308, and J1944+2236. Three of the four pulsars are in binary systems with low-mass companions, which are most likely white dwarfs, and which have orbital periods on the order of days. The fourth pulsar is isolated. All four pulsars have large dispersion measures (DM > 100 pc cm-3), are distant (> 3.4 kpc), faint… 

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