532 citations · 5.2k across the 44 of their papers we have counts for
44 papers
Manipulation Attacks by Misaligned AI: Risk Analysis and Safety Case Framework
Rishane Dassanayake, Mario Demetroudi, James Walpole +3
Frontier AI systems are rapidly advancing in their capabilities to persuade, deceive, and influence human behaviour, with current models already demonstrating human-level persuasio…
The International Pulsar Timing Array second data release: Search for an isotropic Gravitational Wave Background
J. Antoniadis, Z. Arzoumanian, S. Babak +123
We searched for an isotropic stochastic gravitational wave background in the second data release of the International Pulsar Timing Array, a global collaboration synthesizing decad…
Timing of young radio pulsars II. Braking indices and their interpretation
A. Parthasarathy, S. Johnston, R. M. Shannon +8
In Paper I of this series, we detected a significant value of the braking index () for 19 young, high- radio pulsars using 10 years of timing observations from t…
The International Pulsar Timing Array: Second data release
B. B. P. Perera, M. E. DeCesar, P. B. Demorest +72
In this paper, we describe the International Pulsar Timing Array second data release, which includes recent pulsar timing data obtained by three regional consortia: the European Pu…
Timing of young radio pulsars I: Timing noise, periodic modulation and proper motion
A. Parthasarathy, R. M. Shannon, S. Johnston +9
The smooth spin-down of young pulsars is perturbed by two non-deterministic phenomenon, glitches and timing noise. Although the timing noise provides insights into nuclear and plas…
Improving timing sensitivity in the microhertz frequency regime: limits from PSR J17130747 on gravitational waves produced by super-massive black-hole binaries
B. B. P. Perera, B. W. Stappers, S. Babak +25
We search for continuous gravitational waves (CGWs) produced by individual super-massive black-hole binaries (SMBHBs) in circular orbits using high-cadence timing observations of P…
Tests of Gravitational Symmetries with Pulsar Binary J1713+0747
W. W. Zhu, G. Desvignes, N. Wex +50
Symmetries play an important role in modern theories of gravity. The strong equivalence principle (SEP) constitutes a collection of gravitational symmetries which are all implement…
Deep CO(1-0) Observations of z=1.62 Cluster Galaxies with Substantial Molecular Gas Reservoirs and Normal Star Formation Efficiencies
Gregory Rudnick, Jacqueline Hodge, Fabian Walter +9
We present an extremely deep CO(1-0) observation of a confirmed galaxy cluster. We detect two spectroscopically confirmed cluster members in CO(1-0) with . Both gal…
Robust Estimation of Scattering in Pulsar Timing Analysis
L. Lentati, M. Kerr, S. Dai +3
We present a robust approach to incorporating models for the time-variable broadening of the pulse profile due to scattering in the ionized interstellar medium into profile-domain…
Wide-band Profile Domain Pulsar Timing Analysis
L. Lentati, M. Kerr, S. Dai +22
We extend profile domain pulsar timing to incorporate wide-band effects such as frequency-dependent profile evolution and broadband shape variation in the pulse profile. We also in…
The disturbance of a millisecond pulsar magnetosphere
R. M. Shannon, L. T. Lentati, M. Kerr +21
Pulsar timing has enabled some of the strongest tests of fundamental physics. Central to the technique is the assumption that the detected radio pulses can be used to accurately me…
Contamination of the Epoch of Reionization power spectrum in the presence of foregrounds
Peter H. Sims, Lindley Lentati, Paul Alexander +1
We construct foreground simulations comprising spatially correlated extragalactic and diffuse Galactic emission components and calculate the `intrinsic' (instrument-free) two-dimen…
A glitch in the millisecond pulsar J0613-0200
J. W. McKee, G. H. Janssen, B. W. Stappers +17
We present evidence for a small glitch in the spin evolution of the millisecond pulsar J06130200, using the EPTA Data Release 1.0, combined with Jodrell Bank analogue filterbank…
All correlations must die: Assessing the significance of a stochastic gravitational-wave background in pulsar-timing arrays
S. R. Taylor, L. Lentati, S. Babak +4
We present two methods for determining the significance of a stochastic gravitational-wave (GW) background affecting a pulsar-timing array, where detection is based on evidence for…
Proper motions of 15 pulsars: a comparison between Bayesian and frequentist algorithms
L. Li, N. Wang, J. P. Yuan +4
We present proper motions for 15 pulsars which are observed regularly by the Nanshan 25-m radio telescope. Two methods, the frequentist method (Coles et al.2011) and the Bayesian (…
Characterising the rotational irregularities of the Vela pulsar from 21 yr of phase-coherent timing
R. M. Shannon, L. T. Lentati, M. Kerr +3
Pulsars show two classes of rotational irregularities that can be used to understand neutron-star interiors and magnetospheres: glitches and timing noise. Here we present an analys…
A millisecond pulsar in an extremely wide binary system
C. G. Bassa, G. H. Janssen, B. W. Stappers +30
We report on 22 yrs of radio timing observations of the millisecond pulsar J10240719 by the telescopes participating in the European Pulsar Timing Array (EPTA). These observatio…
From Spin Noise to Systematics: Stochastic Processes in the First International Pulsar Timing Array Data Release
L. Lentati, R. M. Shannon, W. A. Coles +80
We analyse the stochastic properties of the 49 pulsars that comprise the first International Pulsar Timing Array (IPTA) data release. We use Bayesian methodology, performing model…
The International Pulsar Timing Array: First Data Release
J. P. W. Verbiest, L. Lentati, G. Hobbs +89
The highly stable spin of neutron stars can be exploited for a variety of (astro-)physical investigations. In particular arrays of pulsars with rotational periods of the order of m…
The noise properties of 42 millisecond pulsars from the European Pulsar Timing Array and their impact on gravitational wave searches
R. N. Caballero, K. J. Lee, L. Lentati +36
The sensitivity of Pulsar Timing Arrays to gravitational waves depends on the noise present in the individual pulsar timing data. Noise may be either intrinsic or extrinsic to the…
Profile Stochasticity in PSR J1909-3744
L. Lentati, R. M. Shannon
We extend the recently introduced Bayesian framework `Generative Pulsar Timing Analysis' to incorporate both pulse jitter (high frequency variation in the arrival time of the pulse…
Gravitational waves from binary supermassive black holes missing in pulsar observations
R. M. Shannon, V. Ravi, L. T. Lentati +19
Gravitational waves are expected to be radiated by supermassive black hole binaries formed during galaxy mergers. A stochastic superposition of gravitational waves from all such bi…
European Pulsar Timing Array Limits on Continuous Gravitational Waves from Individual Supermassive Black Hole Binaries
Stanislav Babak, Antoine Petiteau, Alberto Sesana +33
We have searched for continuous gravitational wave (CGW) signals produced by individually resolvable, circular supermassive black hole binaries (SMBHBs) in the latest EPTA dataset,…
Limits on anisotropy in the nanohertz stochastic gravitational-wave background
S. R. Taylor, C. M. F. Mingarelli, J. R. Gair +32
The paucity of observed supermassive black hole binaries (SMBHBs) may imply that the gravitational wave background (GWB) from this population is anisotropic, rendering existing ana…