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GBT Observations of Very Low Mass Binary Millisecond Pulsars: A Search for Eclipses
David J. Nice, Ingrid H. Stairs, Zaven Arzoumanian
We searched for eclipses of two millisecond pulsars, PSR J1807-2459 and PSR B1908+00. These pulsars are in very low mass binary systems with orbital parameters similar to those of…
Arecibo Measurements of Pulsar--White Dwarf Binaries: Evidence for Heavy Neutron Stars
David J. Nice, Eric M. Splaver, Ingrid H. Stairs
We summarize constraints on neutron star masses from ongoing timing observations of pulsar-white dwarf binaries at Arecibo. The trend is toward pulsar masses larger than the canoni…
The Millisecond Pulsars in NGC 6760
Paulo C. C. Freire, Jason W. T. Hessels, David J. Nice +3
We present the results of recent Arecibo and Green Bank observations of the globular cluster NGC 6760. Using Arecibo, a phase-coherent timing solution has been obtained for the pre…
Masses, Parallax, and Relativistic Timing of the PSR J1713+0747 Binary System
Eric M. Splaver, David J. Nice, Ingrid H. Stairs +2
We report on 12 years of observations of PSR J1713+0747, a pulsar in a 68-day orbit with a white dwarf. Pulse times of arrival were measured with uncertainties as small as 200 ns.…
Multifrequency Observations of Radio Pulse Broadening and Constraints on Interstellar Electron Density Microstructure
N. D. Ramesh Bhat, James M. Cordes, Fernando Camilo +2
We have made observations of 98 low-Galactic-latitude pulsars to measure pulse broadening caused by multipath propagation through the interstellar medium. Data were collected with…