Search Results - "Stinebring, D. R."
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FREQUENCY-DEPENDENT DISPERSION MEASURES AND IMPLICATIONS FOR PULSAR TIMING
Published in The Astrophysical journal (20-01-2016)“…ABSTRACT The dispersion measure (DM), the column density of free electrons to a pulsar, is shown to be frequency dependent because of multipath scattering from…”
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Interstellar holography
Published in Monthly notices of the Royal Astronomical Society (11-08-2008)“…The dynamic spectrum of a radio pulsar is an in-line digital hologram of the ionized interstellar medium. It has previously been demonstrated that such…”
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Interpretation of parabolic arcs in pulsar secondary spectra
Published in Monthly notices of the Royal Astronomical Society (01-10-2004)“…ABSTRACT Pulsar dynamic spectra sometimes show organized interference patterns: these patterns have been shown to have power spectra that often take the form…”
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The NANOGrav 11 Year Data Set: Pulsar-timing Constraints on the Stochastic Gravitational-wave Background
Published in The Astrophysical journal (20-05-2018)“…We search for an isotropic stochastic gravitational-wave background (GWB) in the newly released 11 year data set from the North American Nanohertz Observatory…”
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The International Pulsar Timing Array: First data release
Published in Monthly notices of the Royal Astronomical Society (11-05-2016)“…The highly stable spin of neutron stars can be exploited for a variety of (astro)physical investigations. In particular, arrays of pulsars with rotational…”
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The NANOGrav 11 yr Data Set: Limits on Gravitational Waves from Individual Supermassive Black Hole Binaries
Published in The Astrophysical journal (01-08-2019)“…Observations indicate that nearly all galaxies contain supermassive black holes at their centers. When galaxies merge, their component black holes form SMBH…”
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Electric field representation of pulsar intensity spectra
Published in Monthly notices of the Royal Astronomical Society (01-10-2005)“…Pulsar dynamic spectra exhibit high-visibility fringes arising from interference between scattered radiowaves. These fringes may be random or of highly ordered…”
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Faint Scattering Around Pulsars: Probing the Interstellar Medium on Solar System Size Scales
Published in The Astrophysical journal (01-03-2001)Get full text
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The NANOGrav Nine-year Data Set: Measurement and Analysis of Variations in Dispersion Measures
Published in The Astrophysical journal (01-06-2017)“…We analyze dispersion measure (DM) variations of 37 millisecond pulsars in the nine-year North American Nanohertz Observatory for Gravitational Waves…”
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Modeling the Uncertainties of Solar System Ephemerides for Robust Gravitational-wave Searches with Pulsar-timing Arrays
Published in The Astrophysical journal (01-04-2020)“…The regularity of pulsar emissions becomes apparent once we reference the pulses' times of arrivals to the inertial rest frame of the solar system. It follows…”
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Scattering features and variability of the Crab pulsar
Published in Monthly notices of the Royal Astronomical Society (11-02-2019)Get full text
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From spin noise to systematics: stochastic processes in the first International Pulsar Timing Array data release
Published in Monthly notices of the Royal Astronomical Society (11-05-2016)“…We analyse the stochastic properties of the 49 pulsars that comprise the first International Pulsar Timing Array (IPTA) data release. We use Bayesian…”
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The NANOGrav 11 yr Data Set: Limits on Gravitational Wave Memory
Published in The Astrophysical journal (20-01-2020)“…The mergers of supermassive black hole binaries (SMBHBs) promise to be incredible sources of gravitational waves (GWs). While the oscillatory part of the…”
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A Second Chromatic Timing Event of Interstellar Origin toward PSR J1713+0747
Published in The Astrophysical journal (10-07-2018)“…The frequency dependence of radio pulse arrival times provides a probe of structures in the intervening media. Demorest et al. was the first to show a…”
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GRAVITATIONAL WAVES FROM INDIVIDUAL SUPERMASSIVE BLACK HOLE BINARIES IN CIRCULAR ORBITS: LIMITS FROM THE NORTH AMERICAN NANOHERTZ OBSERVATORY FOR GRAVITATIONAL WAVES
Published in The Astrophysical journal (20-10-2014)“…We perform a search for continuous gravitational waves from individual supermassive black hole binaries using robust frequentist and Bayesian techniques. We…”
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Studying the Solar system with the International Pulsar Timing Array
Published in Monthly notices of the Royal Astronomical Society (01-12-2018)“…Pulsar-timing analyses are sensitive to errors in the Solar-system ephemerides (SSEs) that timing models utilize to estimate the location of the Solar-system…”
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On Frequency-dependent Dispersion Measures and Extreme Scattering Events
Published in The Astrophysical journal (01-04-2020)“…Radio emission propagating over an Earth-pulsar line of sight provides a unique probe of the intervening ionized interstellar medium (ISM). Variations in the…”
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The NANOGrav 11 yr Data Set: Evolution of Gravitational-wave Background Statistics
Published in The Astrophysical journal (20-02-2020)“…An ensemble of inspiraling supermassive black hole binaries should produce a stochastic background of very low frequency gravitational waves. This stochastic…”
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Low-frequency pulse profile variation in PSR B2217+47: evidence for echoes from the interstellar medium
Published in Monthly notices of the Royal Astronomical Society (11-05-2018)“…Abstract We have observed a complex and continuous change in the integrated pulse profile of PSR B2217+47, manifested as additional components trailing the…”
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The NANOGrav 11-year Data Set: Pulse Profile Variability
Published in The Astrophysical journal (01-12-2018)“…Access to 50 years of data has led to the discovery of pulsar emission and rotation variability on timescales of months and years. Most of this long-term…”
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