Results 111 to 120 of about 12,076,896 (214)

Bounding the Photon Mass with Ultrawide Bandwidth Pulsar Timing Data and Dedispersed Pulses of Fast Radio Bursts

The Astrophysical Journal
Exploring the concept of a massive photon has been an important area in astronomy and physics. If photons have mass, their propagation in nonvacuum space would be affected by both the nonzero mass m _γ and the presence of a plasma medium. This would lead
Yu-Bin Wang, Xia Zhou, Abdusattar Kurban, Fa-Yin Wang   +3 more
doaj   +1 more source

Augmentation Method for X-Ray Pulsar Navigation Using Time Difference of Arrival and Range Measurement, Based on Polarization Encoded Pulse Position Modulation

Aerospace
This paper addresses the use of the position difference between the reference satellite and the target spacecraft to improve X-ray pulsar navigation (XPNAV) for Earth orbit spacecraft. This is achieved by first installing an X-ray detector on the reference satellite whose position is accurately known.
Rong Jiao, Hua Zhang
openaire   +2 more sources

The GMRT High-resolution Southern Sky Survey for Pulsars and Transients. VII. Timing of the Spider Millisecond Pulsar PSR J1242–4712, a Bridge between Redback and Black Widow Pulsars

The Astrophysical Journal
We present a timing solution for the 5.31 ms spider millisecond pulsar (MSP) J1242−4712, discovered with the GMRT. PSR J1242−4712 orbits a companion of minimum mass 0.08 M _⊙ with an orbital period of 7.7 hr and occupies a relatively unexplored region in
Ankita Ghosh, Bhaswati Bhattacharyya, Andrew Lyne, David L. Kaplan, Jayanta Roy, Paul S. Ray, Ben Stappers, Sangita Kumari, Shubham Singh, Rahul Sharan   +9 more
doaj   +1 more source

Challenges in Binary Pulsar Timing Detection of Dark Matter Subhalos

The Astrophysical Journal Letters
Recently, binary pulsar timing has been proposed as a viable probe of dark matter subhalos with masses of ∼10 ^7 M _⊙ in the solar neighborhood.
Zheng-Long Wang, Zi-Qing Xia, Yue-Lin Sming Tsai, Yi-Zhong Fan   +3 more
doaj   +1 more source

A Comprehensive Framework for Phase-coherent Mapping of the Gravitational-wave Sky with Pulsar Timing Arrays

The Astrophysical Journal
We present a practical implementation of a phase-coherent mapping technique for pulsar timing arrays that resolves the full complex polarisation state of the gravitational-wave sky as a function of direction and frequency.
Małgorzata Curyło, Eric Thrane, Paul D. Lasky, Dawson S. Gaynor   +3 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

Pulsar timing anomaly detection using Bayesian estimation

Astronomy & Astrophysics
The sensitivity of nanohertz gravitational wave detection relies heavily on the data quality of pulsar timing arrays. However, observational data inevitably contain non-Gaussian outliers, which severely degrade the accuracy of parameter estimation under ...
Liang Bo, Chai Shaohuai, Hao Longfei, Feng Song, Wei Shoulin, Dai Wei   +5 more
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

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