Investigation of Accuracy of TOA and SNR of Radio Pulsar Signals for Vehicles Navigation [PDF]
Sensors, 2023 It is known that X-ray and gamma-ray pulsars can only be observed by spacecraft because signals from these pulsars are impossible to be detected on the Earth’s surface due to their strong absorption by the Earth’s atmosphere.
Hristo Kabakchiev +4 more
doaj +2 more sources
Rethinking the potential role of dose painting in personalized ultra-fractionated stereotactic adaptive radiotherapy [PDF]
Frontiers in OncologyFractionated radiotherapy was established in the 1920s based upon two principles: (1) delivering daily treatments of equal quantity, unless the clinical situation requires adjustment, and (2) defining a specific treatment period to deliver a total dosage.
Hao Peng +6 more
doaj +2 more sources
Effect of PECVD SiNx deposition process parameters on electrical properties of SiNx/AlGaN/GaN structures [PDF]
Modern Electronic Materials, 2021 The effect of parameters of plasma enhanced chemical vapor deposition (PECVD) processes for SiNx film fabrication on the electrical parameters of dielectric/АlGaN/GaN structures has been studied.
Kira L. Enisherlova +3 more
doaj +3 more sources
The second data release from the European Pulsar Timing Array. III. Search for gravitational wave signals [PDF]
Astronomy & Astrophysics, 2023 We present the results of the search for an isotropic stochastic gravitational wave background (GWB) at nanohertz frequencies using the second data release of the European Pulsar Timing Array (EPTA) for 25 millisecond pulsars and a combination with the ...
J. Antoniadis +97 more
semanticscholar +1 more source
Searching for the Nano-Hertz Stochastic Gravitational Wave Background with the Chinese Pulsar Timing Array Data Release I [PDF]
Research in Astronomy and Astrophysics, 2023 Observing and timing a group of millisecond pulsars with high rotational stability enables the direct detection of gravitational waves (GWs). The GW signals can be identified from the spatial correlations encoded in the times-of-arrival of widely spaced ...
Heng Xu +26 more
semanticscholar +1 more source
Search for an Isotropic Gravitational-wave Background with the Parkes Pulsar Timing Array [PDF]
Astrophysical Journal Letters, 2023 Pulsar timing arrays aim to detect nanohertz-frequency gravitational waves (GWs). A background of GWs modulates pulsar arrival times and manifests as a stochastic process, common to all pulsars, with a signature spatial correlation.
D. Reardon +28 more
semanticscholar +1 more source
The second data release from the European Pulsar Timing Array. I. The dataset and timing analysis [PDF]
Astronomy & Astrophysics, 2023 Pulsar timing arrays offer a probe of the low-frequency gravitational wave spectrum (1 - 100 nanohertz), which is intimately connected to a number of markers that can uniquely trace the formation and evolution of the Universe.
J. Antoniadis +68 more
semanticscholar +1 more source
A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy [PDF]
Astrophysical Journal Letters, 2021 We report on Bayesian estimation of the radius, mass, and hot surface regions of the massive millisecond pulsar PSR J0740+6620, conditional on pulse-profile modeling of Neutron Star Interior Composition Explorer X-ray Timing Instrument event data.
T. E. Riley +29 more
semanticscholar +1 more source
The Parkes Pulsar Timing Array third data release [PDF]
Publications Astronomical Society of Australia, 2023 We present the third data release from the Parkes Pulsar Timing Array (PPTA) project. The release contains observations of 32 pulsars obtained using the 64-m Parkes ‘Murriyang’ radio telescope.
A. Zic +33 more
semanticscholar +1 more source
The Gravitational-wave Background Null Hypothesis: Characterizing Noise in Millisecond Pulsar Arrival Times with the Parkes Pulsar Timing Array [PDF]
Astrophysical Journal Letters, 2023 The noise in millisecond pulsar (MSP) timing data can include contributions from observing instruments, the interstellar medium, the solar wind, solar system ephemeris errors, and the pulsars themselves.
D. Reardon +21 more
semanticscholar +1 more source