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Noise-marginalized optimal statistic: A robust hybrid frequentist-Bayesian statistic for the stochastic gravitational-wave background in pulsar timing arrays
Sarah J. Vigeland, Kristina Islo, Stephen R. Taylor +1
Observations have revealed that nearly all galaxies contain supermassive black holes (SMBHs) at their centers. When galaxies merge, these SMBHs form SMBH binaries (SMBHBs) that emi…
Noise Budget and Interstellar Medium Mitigation Advances in the NANOGrav Pulsar Timing Array
T. Dolch, S. Chatterjee, J. M. Cordes +9
Gravitational wave (GW) detection with pulsar timing arrays (PTAs) requires accurate noise characterization. The noise of our Galactic-scale GW detector has been systematically eva…
How proper are Bayesian models in the astronomical literature?
Hyungsuk Tak, Sujit K. Ghosh, Justin A. Ellis
The well-known Bayes theorem assumes that a posterior distribution is a probability distribution. However, the posterior distribution may no longer be a probability distribution if…
Statistical Analyses for NANOGrav 5-year Timing Residuals
Y. Wang, J. M. Cordes, F. A. Jenet +11
In pulsar timing, timing residuals are the differences between the observed times of arrival and the predictions from the timing model. A comprehensive timing model will produce fe…
The International Pulsar Timing Array: First Data Release
J. P. W. Verbiest, L. Lentati, G. Hobbs +89
The highly stable spin of neutron stars can be exploited for a variety of (astro-)physical investigations. In particular arrays of pulsars with rotational periods of the order of m…
A Trans-dimensional Bayesian Approach to Pulsar Timing Noise Analysis
Justin Ellis, Neil Cornish
The modeling of intrinsic noise in pulsar timing residual data is of crucial importance for Gravitational Wave (GW) detection and pulsar timing (astro)physics in general. The noise…
Single-Source Gravitational Wave Limits from the J1713+0747 24-hr Global Campaign
T. Dolch, J. A. Ellis, S. Chatterjee +34
Dense, continuous pulsar timing observations over a 24-hr period provide a method for probing intermediate gravitational wave (GW) frequencies from 10 microhertz to 20 millihertz.…
The NANOGrav Nine-year Data Set: Observations, Arrival Time Measurements, and Analysis of 37 Millisecond Pulsars
Z. Arzoumanian, A. Brazier, S. Burke-Spolaor +41
We present high-precision timing observations spanning up to nine years for 37 millisecond pulsars monitored with the Green Bank and Arecibo radio telescopes as part of the North A…
Time-domain Implementation of the Optimal Cross-Correlation Statistic for Stochastic Gravitational-Wave Background Searches in Pulsar Timing Data
Sydney J. Chamberlin, Jolien D. E. Creighton, Paul B. Demorest +4
Supermassive black hole binaries, cosmic strings, relic gravitational waves from inflation, and first order phase transitions in the early universe are expected to contribute to a…
The stochastic background: scaling laws and time to detection for pulsar timing arrays
Xavier Siemens, Justin Ellis, Fredrick Jenet +1
We derive scaling laws for the signal-to-noise ratio of the optimal cross-correlation statistic, and show that the large power-law increase of the signal-to-noise ratio as a functi…
A Bayesian analysis pipeline for continuous GW sources in the PTA band
Justin Ellis
The direct detection of Gravitational Waves (GWs) by Pulsar Timing Arrays (PTAs) is very likely within the next decade. While the stochastic GW background is a promising candidate…
An Efficient Approximation to the Likelihood for Gravitational Wave Stochastic Background Detection Using Pulsar Timing Data
Justin Ellis, Xavier Siemens, Rutger van Haasteren
Direct detection of gravitational waves by pulsar timing arrays will become feasible over the next few years. In the low frequency regime ( Hz -- Hz), we expect…
Results of the First IPTA Closed Mock Data Challenge
Justin Ellis, Xavier Siemens, Sydney Chamberlin
The 2012 International Pulsar Timing Array (IPTA) Mock Data Challenge (MDC) is designed to test current Gravitational Wave (GW) detection algorithms. Here we will briefly outline t…
Optimal strategies for continuous gravitational wave detection in pulsar timing arrays
Justin Ellis, Xavier Siemens, Jolien Creighton
Supermassive black hole binaries (SMBHBs) are expected to emit continuous gravitational waves in the pulsar timing array (PTA) frequency band (-- Hz). The develop…
Practical Methods for Continuous Gravitational Wave Detection using Pulsar Timing Data
J. A. Ellis, F. A. Jenet, M. A. McLaughlin
Gravitational Waves (GWs) are tiny ripples in the fabric of space-time predicted by Einstein's General Relativity. Pulsar timing arrays (PTAs) are well poised to detect low frequen…