Results 81 to 90 of about 605 (176)

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

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

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

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

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

The NANOGrav 12.5 yr Dataset: Chromatic Noise Characterization and Mitigation with Time-domain Kernels

The Astrophysical Journal
Pulsar timing arrays (PTAs) have recently entered the detection era, quickly moving beyond the goal of simply improving sensitivity at the lowest frequencies for the sake of observing the stochastic gravitational wave background (GWB), and focusing on ...
Jeffrey S. Hazboun, Joseph Simon, Jeremy Baier, Bjorn Larsen, Daniel J. Oliver, Paul T. Baker, Bence Bécsy, Siyuan Chen, Alberto Diaz Hernandez, Justin A. Ellis, A. Miguel Holgado, Kristina Islo, Aaron Johnson, Andrew R. Kaiser, Nima Laal, Alexander McEwen, Nihan S. Pol, Joey Shapiro Key, Min Young Kim, Matthew Samson, Brent J. Shapiro-Albert, Jerry P. Sun, Stephen R. Taylor, Caitlin A. Witt, Jeremy Volpe, Christine Ye, Harsha Blumer, Paul R. Brook, Shami Chatterjee, James M. Cordes, Fronefield Crawford, H. Thankful Cromartie, Megan E. DeCesar, Paul B. Demorest, Timothy Dolch, Robert D. Ferdman, Elizabeth C. Ferrara, William Fiore, Emmanuel Fonseca, Nathan Garver-Daniels, Peter A. Gentile, Deborah C. Good, Ross J. Jennings, Megan L. Jones, David L. Kaplan, Michael T. Lam, T. Joseph W. Lazio, Duncan R. Lorimer, Jing Luo, Ryan S. Lynch, Dustin R. Madison, Maura A. McLaughlin, Chiara M. F. Mingarelli, Cherry Ng, David J. Nice, Timothy T. Pennucci, Scott M. Ransom, Paul S. Ray, Xavier Siemens, Renée Spiewak, Ingrid H. Stairs, Daniel R. Stinebring, Kevin Stovall, Joseph K. Swiggum, Jacob E. Turner, Michele Vallisneri, Sarah J. Vigeland   +66 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

A method for searching single gravitational wave sources with a pulsar timing array

, 2013
L'existence des ondes gravitationnelles, fluctuations de l'espace-temps lui-même, a été prédite sans, pour l'instant, qu'une détection directe n'ait été encore possible. A l'heure actuelle, des méthodes consistant en des détecteurs interférométriques de plusieurs kilomètres de long sont à l'oeuvre pour permettre une première détection.
openaire   +1 more source