A 350-MHz GBT Survey of 50 Faint Fermi Gamma-ray Sources for Radio Millisecond Pulsars

We have used the Green Bank Telescope at 350MHz to search 50 faint, unidentified Fermi Gamma-ray sources for radio pulsations. So far, these searches have resulted in the discovery of 10 millisecond pulsars, which are plausible counterparts to these unidentified Fermi sources. Here we briefly describe this survey and the characteristics of the newly discovered MSPs.Comment: 4 pages, 2 figures, to appear in AIP Conference Proceedings of Pulsar Conference 2010 "Radio Pulsars: a key to unlock the secrets of the Universe", Sardinia, October 201

Basic Physics with Exotic Millisecond Pulsars

Some of the highest profile, and highest impact, results from pulsar timing involve probing the high-density physics at the cores of the neutron stars or testing general relativity in new and better ways. These efforts almost always involve the rarest and most exotic of recycled binary systems, including those which formed in unusual ways, or those whose orbits or companions were altered later, as often happens in globular clusters. We report recent results, using timing and search observations from the GBT and Arecibo, on several of these exotic systems. We have new and potentially exciting neutron star mass measurements and new tests of general relativity. And we suggest that it is well worth the efforts involved to uncover and examine these "1%" pulsar systems

New PTA-Caliber Millisecond Pulsars from the GBNCC Survey

One of the main science goals of the Green Bank North Celestial Cap (GBNCC) pulsar survey is to find new millisecond pulsars (MSPs) and rapidly assess their suitability for inclusion in pulsar timing arrays (PTAs). The International Pulsar Timing Array (IPTA) currently monitors about 100 MSPs with sub-microsecond RMS residuals in an effort to detect low-frequency gravitational waves from merging supermassive black hole binaries. One of the best ways to improve our sensitivity to the stochastic gravitational wave background is to add high-caliber MSPs to PTAs. Over the past two years, ten MSPs have been discovered in the GBNCC pulsar survey and several have already been added to the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) PTA, and these sources will likely be incorporated into regular monitoring programs by other IPTA member groups soon. In this poster, we will describe the vetting process for new GBNCC MSPs and the timing properies of the latest discoveries incorporated into NANOGrav and other PTAs

New PTA-Caliber Millisecond Pulsars from the GBNCC Survey

One of the main science goals of the Green Bank North Celestial Cap (GBNCC) pulsar survey is to find new millisecond pulsars (MSPs) and rapidly assess their suitability for inclusion in pulsar timing arrays (PTAs). The International Pulsar Timing Array (IPTA) currently monitors about 100 MSPs with sub-microsecond RMS residuals in an effort to detect low-frequency gravitational waves from merging supermassive black hole binaries. One of the best ways to improve our sensitivity to the stochastic gravitational wave background is to add high-caliber MSPs to PTAs. Over the past two years, ten MSPs have been discovered in the GBNCC pulsar survey and several have already been added to the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) PTA, and these sources will likely be incorporated into regular monitoring programs by other IPTA member groups soon. In this poster, we will describe the vetting process for new GBNCC MSPs and the timing properies of the latest discoveries incorporated into NANOGrav and other PTAs