Results 111 to 120 of about 13,694 (217)

The Stack Search Tests on FAST Data: Discovery of Six Faint Isolated Millisecond Pulsars in NGC 6517 and NGC 7078 (M15)

The Astrophysical Journal Letters
We report the discovery of six faint millisecond pulsars (MSPs) in the globular clusters (GCs) NGC 6517 and NGC 7078 (M15) using the Five-hundred-meter Aperture Spherical radio Telescope.
Yinfeng Dai, Xing-Jiang Zhu, Zhichen Pan, Lei Qian, Li-yun Zhang, Dejiang Yin, Yu Pan, Bo Peng, Baoda Li, Yujie Lian, Yaowei Li, Yuxiao Wu, Menglin Huang, Qiaoli Hao, Xingyi Wang, Xianghua Niu, Jinyou Song, Minglei Guo, Shuangyuan Chen   +18 more
doaj   +1 more source

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

A 34 yr Timing Solution of the Redback Millisecond Pulsar Terzan 5A

The Astrophysical Journal
We present a 34 yr timing solution of the redback pulsar system Terzan 5A (Ter5A). Ter5A, also known as B1744−24A or J1748−2446A, has a 11.56 ms pulse period, a ~0.1 M _⊙ dwarf companion star, and an orbital period of 1.82 hr.
Alexandra C. Rosenthal, Scott M. Ransom, Kyle A. Corcoran, Megan E. DeCesar, Paulo C. C. Freire, Jason W. T. Hessels, Michael J. Keith, Ryan S. Lynch, Andrew Lyne, David J. Nice, Ingrid H. Stairs, Ben Stappers, Jay Strader, Stephen E. Thorsett, Ryan Urquhart   +14 more
doaj   +1 more source

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

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

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

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