Results 91 to 100 of about 13,579 (182)

A Multifrequency Census of 100 Pulsars below 100 MHz with LWA: A Systematic Study of Flux Density, Spectra, Timing, Dispersion, Polarization, and Its Variation from a Decade of Observations

The Astrophysical Journal
We present a census of 100 pulsars, the largest below 100 MHz, including 94 normal pulsars and six millisecond pulsars, with the Long Wavelength Array (LWA).
P. Kumar, G. B. Taylor, K. Stovall, J. Dowell, S. M. White   +4 more
doaj   +1 more source

Graph-based Summary Statistics for Revealing the Stochastic Gravitational-wave Background in Pulsar Timing Arrays

The Astrophysical Journal
In this work, we propose a graph-based method implemented on the pulsar timing residuals for stochastic gravitational-wave background (SGWB) detection within the nanohertz frequency regime and examining uncertainties of its parameters.
M. Alakhras, S. M. S. Movahed
doaj   +1 more source

Improving Pulsar Timing Precision with Single Pulse Fluence Clustering

The Astrophysical Journal
Traditional pulsar timing techniques involve averaging large numbers of single pulses to obtain a high signal-to-noise ratio (S/N) profile, which is cross-correlated with a template to measure a time of arrival (TOA).
Sofia V. Sosa Fiscella, Michael T. Lam, Maura A. McLaughlin   +2 more
doaj   +1 more source

Optimising gravitational-wave sky maps for pulsar timing arrays

Astronomy & Astrophysics
Context. Pulsar timing arrays (PTAs) have recently reported compelling evidence for the presence of a gravitational-wave background signal. Mapping the gravitational-wave background is key to understanding how it is formed, since anisotropy is a tracer ...
Grunthal Kathrin, Champion David J., Thrane Eric, Nathan Rowina S., Kramer Michael, Miles Matthew T.   +5 more
doaj   +1 more source

Algorithmic Pulsar Timer for Binaries

The Astrophysical Journal
Pulsar timing is a powerful tool that, by accounting for every rotation of a pulsar, precisely measures the spin frequency, spin frequency derivatives, astrometric position, binary parameters when applicable, properties of the interstellar medium, and ...
Jackson Taylor, Scott Ransom, Prajwal V. Padmanabh   +2 more
doaj   +1 more source

Investigation of Accuracy of TOA and SNR of Radio Pulsar Signals for Vehicles Navigation. [PDF]

Sensors (Basel), 2023
Kabakchiev H, Behar V, Kabakchieva D, Kisimov V, Stefanova K.   +4 more
europepmc   +1 more source

Pulsar Timing Arrays Require Hierarchical Models

The Astrophysical Journal Supplement Series
Pulsar timing array (PTA) projects have found evidence of a stochastic background of gravitational waves (GWB) using data from an ensemble of pulsars. In the literature, minimal assumptions are made about the signal and noise processes that affect data ...
Rutger van Haasteren
doaj   +1 more source

A radio pulsar phase from SGR J1935+2154 provides clues to the magnetar FRB mechanism. [PDF]

Sci Adv, 2023
Zhu W, Xu H, Zhou D, Lin L, Wang B, Wang P, Zhang C, Niu J, Chen Y, Li C, Meng L, Lee K, Zhang B, Feng Y, Ge M, Göğüş E, Guan X, Han J, Jiang J, Jiang P, Kouveliotou C, Li D, Miao C, Miao X, Men Y, Niu C, Wang W, Wang Z, Xu J, Xu R, Xue M, Yang Y, Yu W, Yuan M, Yue Y, Zhang S, Zhang Y.   +36 more
europepmc   +1 more source

Upper Limits on Microhertz Gravitational Waves from Supermassive Black Hole Binaries Using PSR J1909–3744 Data from the Second IPTA Data Release

The Astrophysical Journal
We present the results of a search for gravitational waves (GWs) from individual sources using high-cadence observations of PSR J1909−3744 obtained during an intensive observing campaign with the International Pulsar Timing Array second data release ...
Jing Zou, Jingbo Wang, Jianping Yuan, De Zhao, Yirong Wen, Wei Li, Na Wang, Yong Xia   +7 more
doaj   +1 more source