Publications (197)
Spectral properties of 441 radio pulsars
F. Jankowski, W. van Straten, E. F. Keane +4
We present a study of the spectral properties of 441 pulsars observed with the Parkes radio telescope near the centre frequencies of 728, 1382 and 3100 MHz. The observations at 728…
The Parkes pulsar timing array second data release: Timing analysis
D. J. Reardon, R. M. Shannon, A. D. Cameron +14
The main goal of pulsar timing array experiments is to detect correlated signals such as nanohertz-frequency gravitational waves. Pulsar timing data collected in dense monitoring c…
Timing of millisecond pulsars in NGC\,6752 -- III. On the presence of non-luminous matter in the cluster's core
A. Corongiu, A. Ridolfi, F. Abbate +9
Millisecond pulsars are subject to accelerations in globular clusters (GCs) that manifest themselves in both the first and second spin period time derivatives, and can be used to e…
Discovery of Two Relativistic Neutron Star-White Dwarf Binaries
R. T. Edwards, M. Bailes
We have discovered two recycled pulsars in relativistic orbits as part of the first high-frequency survey of intermediate Galactic latitudes. PSR J1157-5112 is a 44 ms pulsar and t…
A 6.5-GHz Multibeam Pulsar Survey
S. D. Bates, S. Johnston, D. R. Lorimer +10
A survey of the Galactic plane in the region , was carried out using the seven-beam Parkes Methanol Multibeam (MMB) receive…
Multi-frequency observations of SGR J1935+2154
M. Bailes, C. G. Bassa, G. Bernardi +54
Magnetars are a promising candidate for the origin of Fast Radio Bursts (FRBs). The detection of an extremely luminous radio burst from the Galactic magnetar SGR J1935+2154 on 2020…
Radio emission evolution, polarimetry and multifrequency single pulse analysis of the radio magnetar PSR J1622-4950
L. Levin, M. Bailes, S. D. Bates +11
Here we report on observations of the radio magnetar PSR J1622-4950 at frequencies from 1.4 to 17 GHz. We show that although its flux density is varying up to a factor of ~10 withi…
Millisecond Pulsar Velocities
M. Toscano, J. S. Sandhu, M. Bailes +5
We present improved timing parameters for 13 millisecond pulsars (MSPs) including 9 new proper motion measurements. These new proper motions bring to 23 the number of MSPs with mea…
A New Method for Obtaining Binary Pulsar Distances and its Implications for Tests of General Relativity
J. F. Bell, M. Bailes
We demonstrate how measuring orbital period derivatives can lead to more accurate distance estimates and transverse velocities for some nearby binary pulsars. In many cases this me…
Versatile Directional Searches for Gravitational Waves with Pulsar Timing Arrays
D. R. Madison, X. -J. Zhu, G. Hobbs +23
By regularly monitoring the most stable millisecond pulsars over many years, pulsar timing arrays (PTAs) are positioned to detect and study correlations in the timing behaviour of…
Identifying and mitigating noise sources in precision pulsar timing data sets
Boris Goncharov, D. J. Reardon, R. M. Shannon +14
Pulsar timing array projects measure the pulse arrival times of millisecond pulsars for the primary purpose of detecting nanohertz-frequency gravitational waves. The measurements i…
An insight into chromatic behaviour of jitter in pulsars and its modelling: A case study of PSR J04374715
A. D. Kulkarni, R. M. Shannon, D. J. Reardon +3
Pulse-to-pulse profile shape variations introduce correlations in pulsar times of arrival (TOAs) across radio frequency measured at the same observational epoch. This leads to a br…
The UTMOST: A hybrid digital signal processor transforms the MOST
M. Bailes, A. Jameson, C. Flynn +20
The Molonglo Observatory Synthesis Telescope (MOST) is an 18,000 square meter radio telescope situated some 40 km from the city of Canberra, Australia. Its operating band (820-850…
Precision timing of PSR J0437-4715: an accurate pulsar distance, a high pulsar mass and a limit on the variation of Newton's gravitational constant
J. P. W. Verbiest, M. Bailes, W. van Straten +7
Analysis of ten years of high-precision timing data on the millisecond pulsar PSR J0437-4715 has resulted in a model-independent kinematic distance based on an apparent orbital per…
Discovery of 37 new pulsars through GPU-accelerated reprocessing of archival data of the Parkes Multibeam Pulsar Survey
R. Sengar, M. Bailes, V. Balakrishnan +7
We present the discovery of 37 pulsars from 20 years old archival data of the Parkes Multibeam Pulsar Survey using a new FFT-based search pipeline optimised for discovering…
Limitations in timing precision due to single-pulse shape variability in millisecond pulsars
R. M. Shannon, S. OsÅowski, S. Dai +17
High-sensitivity radio-frequency observations of millisecond pulsars usually show stochastic, broadband, pulse-shape variations intrinsic to the pulsar emission process. These vari…
Mass measurements and 3D orbital geometry of PSR J19336211
M. Geyer, V. Venkatraman Krishnan, P. C. C. Freire +19
PSR J19336211 is a 3.5-ms pulsar in a 12.8-d orbit with a white dwarf (WD). Its high proper motion and low dispersion measure result in such significant interstellar scintillati…
The Swinburne Intermediate Latitude Pulsar Survey
R. T. Edwards, M. Bailes, W. van Straten +1
We have conducted a survey of intermediate Galactic latitudes using the 13-beam 21-cm multibeam receiver of the Parkes 64-m radio telescope. The survey covered the region enclosed…
Eight new millisecond pulsars from the first MeerKAT globular cluster census
A. Ridolfi, T. Gautam, P. C. C. Freire +24
We have used the central 44 antennas of the new 64-dish MeerKAT radio telescope array to conduct a deep search for new pulsars in the core of nine globular clusters. This has led t…
Commensal discovery of four Fast Radio Bursts during Parkes Pulsar Timing Array observations
S. OsÅowski, R. M. Shannon, V. Ravi +25
The Parkes Pulsar Timing Array (PPTA) project monitors two dozen millisecond pulsars (MSPs) in order to undertake a variety of fundamental physics experiments using the Parkes 64m…
The High Time Resolution Universe Pulsar Survey IV: Discovery and polarimetry of millisecond pulsars
M. J. Keith, S. Johnston, M. Bailes +13
We present the discovery of six millisecond pulsars (MSPs) in the High Time Resolution Universe (HTRU) survey for pulsars and fast transients carried out with the Parkes radio tele…
Timing, polarimetry and physics of the bright, nearby millisecond pulsar PSR J0437-4715 - a single-pulse perspective
S. OsÅowski, W. van Straten, M. Bailes +2
Single pulses from radio pulsars contain a wealth of information about emission and propagation in the magnetosphere and insight into their timing properties. It was recently demon…
Modelling annual and orbital variations in the scintillation of the relativistic binary PSR J11416545
D. J. Reardon, W. A. Coles, G. Hobbs +5
We have observed the relativistic binary pulsar PSR J11416545 over a period of 6 years using the Parkes 64 m radio telescope, with a focus on modelling the diffractive int…
The High Time Resolution Universe Pulsar Survey XII : Galactic plane acceleration search and the discovery of 60 pulsars
C. Ng, D. J. Champion, M. Bailes +18
We present initial results from the low-latitude Galactic plane region of the High Time Resolution Universe pulsar survey conducted at the Parkes 64-m radio telescope. We discuss t…
Rotational and radio emission properties of PSR J0738-4042 over half a century
M. E. Lower, S. Johnston, A. Karastergiou +14
We present a comprehensive study of the rotational and emission properties of PSR J07384042 using a combination of observations taken by the Deep Space Network, Hartebeesthoek,…
The international pulsar timing array project: using pulsars as a gravitational wave detector
G. Hobbs, A. Archibald, Z. Arzoumanian +55
The International Pulsar Timing Array project combines observations of pulsars from both Northern and Southern hemisphere observatories with the main aim of detecting ultra-low fre…
Comparison of Pulsar Positions from Timing and Very Long Baseline Astrometry
J. B. Wang, W. A. Coles, G. Hobbs +22
Pulsar positions can be measured with high precision using both pulsar timing methods and very-long-baseline interferometry (VLBI). Pulsar timing positions are referenced to a sola…
Studying the solar system with the International Pulsar Timing Array
R. N. Caballero, Y. J. Guo, K. J. Lee +77
Pulsar-timing analyses are sensitive to errors in the solar-system ephemerides (SSEs) that timing models utilise to estimate the location of the solar-system barycentre, the quasi-…
Five new real-time detections of Fast Radio Bursts with UTMOST
W. Farah, C. Flynn, M. Bailes +25
We detail a new fast radio burst (FRB) survey with the Molonglo Radio Telescope, in which six FRBs were detected between June 2017 and December 2018. By using a real-time FRB detec…
Comptel Detection of Pulsed Emission from PSR B1509-58 up to at Least 10 MeV
L. Kuiper, W. Hermsen, J. M. Krijger +5
We report the COMPTEL detection of pulsed -emission from PSR B1509-58 up to at least 10 MeV using data collected over more than 6 years. The 0.75-10 MeV lightcurve is broad and…
Hunting for radio emission from the intermittent pulsar J1107-5907 at low frequencies
B. W. Meyers, S. E. Tremblay, N. D. R. Bhat +30
The rare intermittent pulsars pose some of the most challenging questions surrounding the pulsar emission mechanism, but typically have relatively minimal low-frequency (…
On detection of the stochastic gravitational-wave background using the Parkes pulsar timing array
D. R. B. Yardley, W. A. Coles, G. B. Hobbs +12
We search for the signature of an isotropic stochastic gravitational-wave background in pulsar timing observations using a frequency-domain correlation technique. These observation…
Measuring the mass of solar system planets using pulsar timing
D. J. Champion, G. B. Hobbs, R. N. Manchester +19
High-precision pulsar timing relies on a solar-system ephemeris in order to convert times of arrival (TOAs) of pulses measured at an observatory to the solar system barycenter. Any…
Upper bounds on the low-frequency stochastic gravitational wave background from pulsar timing observations: current limits and future prospects
F. A. Jenet, G. B. Hobbs, W. van Straten +7
Using a statistically rigorous analysis method, we place limits on the existence of an isotropic stochastic gravitational wave background using pulsar timing observations. We consi…
The MeerTime Pulsar Timing Array -- A Census of Emission Properties and Timing Potential
R. Spiewak, M. Bailes, M. T. Miles +17
MeerTime is a five-year Large Survey Project to time pulsars with MeerKAT, the 64-dish South African precursor to the Square Kilometre Array. The science goals for the programme in…
Dispersion Measure Variations and their Effect on Precision Pulsar Timing
X. P. You, G. Hobbs, W. A. Coles +11
We present an analysis of the variations seen in the dispersion measures (DMs) of 20 millisecond pulsars observed as part of the Parkes Pulsar Timing Array project. We carry out a…
The SUrvey for Pulsars and Extragalactic Radio Bursts V: Recent Discoveries and Full Timing Solutions
R. Spiewak, C. Flynn, S. Johnston +10
The SUrvey for Pulsars and Extragalactic Radio Bursts ran from 2014 April to 2019 August, covering a large fraction of the southern hemisphere at mid- to high-galactic latitudes, a…
Discoveries and Timing of Pulsars in M62
L. Vleeschower, A. Corongiu, B. W. Stappers +14
Using MeerKAT, we have discovered three new millisecond pulsars (MSPs) in the bulge globular cluster M62: M62H, M62I, and M62J. All three are in binary systems, which means all ten…
The eccentric millisecond pulsar, PSR J09556150 I: Pulse profile analysis, mass measurements and constraints on binary evolution
M. Serylak, V. Venkatraman Krishnan, P. C. C. Freire +17
PSR J09556150 is a member of a class of eccentric MSP+He WD systems (eMSPs), whose binary evolution is poorly understood and believed to be different to that of traditional MSP+…
The High Time Resolution Universe Pulsar Survey X: Discovery of four millisecond pulsars and updated timing solutions of a further 12
C. Ng, M. Bailes, S. D. Bates +22
We report on the discovery of four millisecond pulsars (MSPs) in the High Time Resolution Universe (HTRU) pulsar survey being conducted at the Parkes 64-m radio telescope. All four…
Scintillating insights into PSR~J07373039A and the interstellar plasma of the Gum Nebula from MeerKAT
J. Askew, D. J. Reardon, R. M. Shannon +8
The double pulsar system PSR~J07373039A/B has enabled some of the most precise tests of strong-field gravity to date. Here, we present a scintillation analysis of the system bas…
A real-time fast radio burst: polarization detection and multiwavelength follow-up
E. Petroff, M. Bailes, E. D. Barr +32
Fast radio bursts (FRBs) are one of the most tantalizing mysteries of the radio sky; their progenitors and origins remain unknown and until now no rapid multiwavelength follow-up o…
Giant pulses from J1823-3021A observed with the MeerKAT telescope
F. Abbate, M. Bailes, S. J. Buchner +11
The millisecond pulsar J1823-3021A is a very active giant pulse emitter in the globular cluster NGC 6624. New observations with the MeerKAT radio telescope have revealed 14350 gian…
The High Time Resolution Universe Pulsar Survey I: System configuration and initial discoveries
M. J. Keith, A. Jameson, W. van Straten +13
We have embarked on a survey for pulsars and fast transients using the 13-beam Multibeam receiver on the Parkes radio telescope. Installation of a digital backend allows us to reco…
Status Update of the Parkes Pulsar Timing Array
J. P. W. Verbiest, M. Bailes, N. D. R. Bhat +16
The Parkes Pulsar Timing Array project aims to make a direct detection of a gravitational-wave background through timing of millisecond pulsars. In this article, the main requireme…
Parallax of PSR J1744-1134 and the Local Interstellar Medium
M. Toscano, M. C. Britton, R. N. Manchester +4
We present the annual trigonometric parallax of PSR J1744-1134 derived from an analysis of pulse times of arrival. The measured parallax, pi = 2.8+/-0.3 mas ranks among the most pr…
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…
Self-consistency of relativistic observables with general relativity in the white dwarf-neutron star binary pulsar PSR J1141-6545
M. Bailes, S. M. Ord, H. S. Knight +1
Here we report timing measurements of the relativistic binary pulsar PSR J1141-6545 that constrain the component masses and demonstrate that the orbital period derivative \dot Pb =…
Gravitational signal propagation in the Double Pulsar studied with the MeerKAT telescope
H. Hu, M. Kramer, D. J. Champion +16
The Double Pulsar, PSR J0737-3039A/B, has offered a wealth of gravitational experiments in the strong-field regime, all of which GR has passed with flying colours. In particular, a…
The first interferometric detections of Fast Radio Bursts
M. Caleb, C. Flynn, M. Bailes +15
We present the first interferometric detections of Fast Radio Bursts (FRBs), an enigmatic new class of astrophysical transient. In a 180-day survey of the Southern sky we discovere…
Searches for Gravitational Waves from Known Pulsars at Two Harmonics in the Second and Third LIGO-Virgo Observing Runs
The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1694
We present a targeted search for continuous gravitational waves (GWs) from 236 pulsars using data from the third observing run of LIGO and Virgo (O3) combined with data from the se…
The SUrvey for Pulsars and Extragalactic Radio Bursts I: Survey Description and Overview
E. F. Keane, E. D. Barr, A. Jameson +19
We describe the Survey for Pulsars and Extragalactic Radio Bursts (SUPERB), an ongoing pulsar and fast transient survey using the Parkes radio telescope. SUPERB involves real-time…
The High Time Resolution Universe Survey - IX: Polarimetry of long-period pulsars
C. Tiburzi, S. Johnston, M. Bailes +16
We present a polarimetric analysis of 49 long-period pulsars discovered as part of the High Time Resolution Universe (HTRU) southern survey. The sources exhibit the typical charact…
Radio timing constraints on the orbital orientation and component masses of PSR J14553330
D. S. Pillay, V. Venkatraman Krishnan, David J. Champion +15
PSR J14553330 is a 7.98 ms pulsar in a 76.17 day nearly circular orbit with a white dwarf companion. In this work, we combine the available Lovell, Nançay decimetri…
The SUrvey for Pulsars and Extragalactic Radio Bursts IV: Discovery and polarimetry of a 12.1-second radio pulsar
V. Morello, E. F. Keane, T. Enoto +19
We report the discovery of PSR~J22513711, a radio pulsar with a spin period of 12.1 seconds, the second longest currently known. Its timing parameters imply a characteristic age…
DiFX: A software correlator for very long baseline interferometry using multi-processor computing environments
A. T. Deller, S. J. Tingay, M. Bailes +1
We describe the development of an FX style correlator for Very Long Baseline Interferometry (VLBI), implemented in software and intended to run in multi-processor computing environ…
PSR J1141-6545: a powerful laboratory of GR and tensor-scalar theories of gravity
J. P. W. Verbiest, N. D. R. Bhat, M. Bailes
Pulsars in close binary systems have provided some of the most stringent tests of strong-field gravity to date. The pulsar--white-dwarf binary system J1141-6545 is specifically int…
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…
New constraints on the kinematic, relativistic and evolutionary properties of the PSR J17571854 double neutron star system
A. D. Cameron, M. Bailes, D. J. Champion +9
PSR J17571854 is one of the most relativistic double neutron star binary systems known in our Galaxy, with an orbital period of and an orbital eccent…
Searching for continuous Gravitational Waves in the second data release of the International Pulsar Timing Array
M. Falxa, S. Babak, P. T. Baker +123
The International Pulsar Timing Array 2nd data release is the combination of datasets from worldwide collaborations. In this study, we search for continuous waves: gravitational wa…
Glitches in Southern Pulsars
N. Wang, R. N. Manchester, R. T. Pace +4
Timing observations of 40 mostly young pulsars using the ATNF Parkes radio telescope between 1990 January and 1998 December are reported. In total, 20 previously unreported glitche…
Timing stability of millisecond pulsars and prospects for gravitational-wave detection
J. P. W. Verbiest, M. Bailes, W. A. Coles +11
Analysis of high-precision timing observations of an array of approx. 20 millisecond pulsars (a so-called "timing array") may ultimately result in the detection of a stochastic gra…
A bright millisecond radio burst of extragalactic origin
D. R. Lorimer, M. Bailes, M. A. McLaughlin +2
Pulsar surveys offer one of the few opportunities to monitor even a small fraction (~0.00001) of the radio sky for impulsive burst-like events with millisecond durations. In analys…
Relativistic spin precession in the binary PSR J11416545
V. Venkatraman Krishnan, M. Bailes, W. van Straten +5
PSR J11416545 is a precessing binary pulsar that has the rare potential to reveal the two-dimensional structure of a non-recycled pulsar emission cone. It has undergone $\sim 25…
The High Time Resolution Universe Pulsar Survey - XIII. PSR J1757-1854, the most accelerated binary pulsar
A. D. Cameron, D. J. Champion, M. Kramer +27
We report the discovery of PSR J17571854, a 21.5-ms pulsar in a highly-eccentric, 4.4-h orbit around a neutron star (NS) companion. PSR J17571854 exhibits some of the most ex…
Recycled Pulsars Discovered at High Radio Frequency
R. T. Edwards, M. Bailes
We present the timing parameters of nine pulsars discovered in a survey of intermediate Galactic latitudes at 1400 MHz with the Parkes radio telescope. Eight of these pulsars posse…
Optical Observations of the Binary Millisecond Pulsars J2145-0750 and J0034-0534
J. F. Bell, S. R. Kulkarni, M. Bailes +2
We report on optical observations of the low-mass binary millisecond pulsar systems J0034-0534 and J2145-0750. A faint (I=23.5) object was found to be coincident with the timing po…
On the Eccentricities and Merger Rates of Double Neutron Star Binaries and the Creation of "Double Supernovae"
H. K. Chaurasia, M. Bailes
We demonstrate that a natural consequence of an asymmetric kick imparted to neutron stars at birth is that the majority of double neutron star binaries should possess highly eccent…
The MeerKAT Telescope as a Pulsar Facility: System verification and early science results from MeerTime
M. Bailes, A. Jameson, F. Abbate +72
We describe system verification tests and early science results from the pulsar processor (PTUSE) developed for the newly-commissioned 64-dish SARAO MeerKAT radio telescope in Sout…
The High Time Resolution Universe Pulsar Survey -- XV: completion of the intermediate latitude survey with the discovery and timing of 25 further pulsars
M. Burgay, B. Stappers, M. Bailes +21
We report on the latest six pulsars discovered through our standard pipeline in the intermediate-latitude region (|b| < 15 deg) of the Parkes High Time Resolution Universe Survey (…
Discovery and timing of ten new millisecond pulsars in the globular cluster Terzan 5
P. V. Padmanabh, S. M. Ransom, P. C. C. Freire +23
We report the discovery of ten new pulsars in the globular cluster Terzan 5 as part of the Transients and Pulsars with MeerKAT (TRAPUM) Large Survey Project. We observed Terzan 5 a…
The dynamics of Galactic centre pulsars: constraining pulsar distances and intrinsic spin-down
B. B. P. Perera, E. D. Barr, M. B. Mickaliger +11
Through high-precision radio timing observations, we show that five recycled pulsars in the direction of the Galactic Centre (GC) have anomalous spin period time derivative ($\dot…
Pulsars in Globular Clusters with the SKA
J. W. T. Hessels, A. Possenti, M. Bailes +6
Globular clusters are highly efficient radio pulsar factories. These pulsars can be used as precision probes of the clusters' structure, gas content, magnetic field, and formation…
A Fast Radio Burst Host Galaxy
E. F. Keane, S. Johnston, S. Bhandari +38
In recent years, millisecond duration radio signals originating from distant galaxies appear to have been discovered in the so-called Fast Radio Bursts. These signals are dispersed…
FRBCAT: The Fast Radio Burst Catalogue
E. Petroff, E. D. Barr, A. Jameson +6
Here we present a catalogue of known Fast Radio Burst (FRB) sources in the form of an online catalogue, FRBCAT. The catalogue includes information about the instrumentation used fo…
Detection of fast transients with radio interferometric arrays
N. D. R. Bhat, J. N. Chengalur, P. J. Cox +7
Next-generation radio arrays, including the Square Kilometre Array (SKA) and its pathfinders, will open up new avenues for exciting transient science at radio wavelengths. Their in…
The High Time Resolution Universe Survey - V: Single-pulse energetics and modulation properties of 315 pulsars
S. Burke-Spolaor, S. Johnston, M. Bailes +11
We report on the pulse-to-pulse energy distributions and phase-resolved modulation properties for catalogued pulsars in the southern High Time Resolution Universe intermediate-lati…
The High Time Resolution Universe Pulsar Survey - VII: discovery of five millisecond pulsars and the different luminosity properties of binary and isolated recycled pulsars
M. Burgay, M. Bailes, S. D. Bates +18
This paper presents the discovery and timing parameters for five millisecond pulsars (MSPs), four in binary systems with probable white dwarf companions and one isolated, found in…
The Mass of a Millisecond Pulsar
B. A. Jacoby, A. Hotan, M. Bailes +2
We report on nearly two years of timing observations of the low-mass binary millisecond pulsar, PSR J1909-3744 with the Caltech-Parkes-Swinburne Recorder II (CPSR2), a new instrume…
Timing Measurements and Their Implications for Four Binary Millisecond Pulsars
J. F. Bell, M. Bailes, R. N. Manchester +3
We present timing observations of four millisecond pulsars, using data obtained over three years at the ATNF Parkes and NRAL Jodrell Bank radio telescopes. Astrometric, spin, and b…
Spectra of Southern Pulsars
M. Toscano, M. Bailes, R. N. Manchester +1
We compare the spectral properties of the millisecond and slow pulsars detected in the Parkes 70 cm survey. The mean spectral index for the millisecond pulsars (MSPs) is -1.9 +/- 0…
The High Time Resolution Universe survey XIV: Discovery of 23 pulsars through GPU-accelerated reprocessing
V. Morello, E. D. Barr, S. Cooper +21
We have performed a new search for radio pulsars in archival data of the intermediate and high Galactic latitude parts of the Southern High Time Resolution Universe pulsar survey.…
Polarization studies of Rotating Radio Transients
M. Caleb, W. van Straten, E. F. Keane +10
We study the polarization properties of 22 known rotating radio transients (RRATs) with the 64-m Parkes radio telescope and present the Faraday rotation measures (RMs) for the 17 w…
Flux density monitoring of 89 millisecond pulsars with MeerKAT
P. Gitika, M. Bailes, R. M. Shannon +7
We present a flux density study of 89 millisecond pulsars (MSPs) regularly monitored as part of the MeerKAT Pulsar Timing Array (MPTA) using the L-Band receiver with an approximate…
The Thousand-Pulsar-Array programme on MeerKAT VII: Polarisation properties of pulsars in the Magellanic Clouds
S. Johnston, A. Parthasarathy, R. A. Main +12
The Magellanic Clouds are the only external galaxies known to host radio pulsars. The dispersion and rotation measures of pulsars in the Clouds can aid in understanding their struc…
The Orbital Evolution and Proper Motion of PSR J2051-0827
B. W. Stappers, M. Bailes, R. N. Manchester +2
We have carried out high-precision timing observations of the eclipsing binary PSR J2051-0827 in the 3.3 years since its discovery. These data indicate that the orbital period is d…
Narrowband searches for continuous and long-duration transient gravitational waves from known pulsars in the LIGO-Virgo third observing run
The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1658
Isolated neutron stars that are asymmetric with respect to their spin axis are possible sources of detectable continuous gravitational waves. This paper presents a fully-coherent s…
Neutron Star Extreme Matter Observatory: A kilohertz-band gravitational-wave detector in the global network
K. Ackley, V. B. Adya, P. Agrawal +160
Gravitational waves from coalescing neutron stars encode information about nuclear matter at extreme densities, inaccessible by laboratory experiments. The late inspiral is influen…
Revival of the magnetar PSR J1622-4950: observations with MeerKAT, Parkes, XMM-Newton, Swift, Chandra, and NuSTAR
F. Camilo, P. Scholz, M. Serylak +205
New radio (MeerKAT and Parkes) and X-ray (XMM-Newton, Swift, Chandra, and NuSTAR) observations of PSR J1622-4950 indicate that the magnetar, in a quiescent state since at least ear…
A neutral hydrogen distance limit to the relativistic binary PSR J1141-6545
S. M. Ord, M. Bailes, W. van Straten
We have obtained an HI absorption spectrum of the relativistic binary PSR J1141-6545 and used it to constrain the distance to the system. The spectrum suggests that the pulsar is a…
The High Time Resolution Universe Survey - XI. Discovery of five recycled pulsars and the optical detectability of survey white dwarf companions
S. D. Bates, D. Thornton, M. Bailes +20
We present the discovery of a further five recycled pulsar systems in the mid-Galactic latitude portion of the High Time Resolution Universe (HTRU) Survey. The pulsars have rotatio…
The High Time Resolution Universe Pulsar Survey -- XVII. PSR J1325-6253, a low eccentricity double neutron star system from an ultra-stripped supernova
R. Sengar, V. Balakrishnan, S. Stevenson +20
The observable population of double neutron star (DNS) systems in the Milky Way allow us to understand the nature of supernovae and binary stellar evolution. Until now, all DNS sys…
PSR J1022+1001: Profile Stability & Precision Timing
A. W. Hotan, M. Bailes, S. M. Ord
We present an investigation of the morphology and arrival times of integrated radio pulses from the binary millisecond pulsar PSR J1022+1001. This pulsar is renowned for its poor t…
The Sensitivity of the Parkes Pulsar Timing Array to Individual Sources of Gravitational Waves
D. R. B. Yardley, G. B. Hobbs, F. A. Jenet +11
We present the sensitivity of the Parkes Pulsar Timing Array to gravitational waves emitted by individual super-massive black-hole binary systems in the early phases of coalescing…
MeerTime - the MeerKAT Key Science Program on Pulsar Timing
M. Bailes, E. Barr, N. D. R. Bhat +28
The MeerKAT telescope represents an outstanding opportunity for radio pulsar timing science with its unique combination of a large collecting area and aperture efficiency (effectiv…
COMPTEL detection of pulsed gamma-ray emission from B1509-58 up to at least 10 MeV
L. Kuiper, W. Hermsen, J. M. Krijger +5
We report on the first firm detection of pulsed gamma-ray emission from PSR B1509-58 in the 0.75-30 MeV energy range in CGRO COMPTEL data collected over more than 6 years. The modu…
Timing analysis for 20 millisecond pulsars in the Parkes Pulsar Timing Array
D. J. Reardon, G. Hobbs, W. Coles +18
We present timing models for 20 millisecond pulsars in the Parkes Pulsar Timing Array. The precision of the parameter measurements in these models has been improved over earlier re…
Timing models for the long-orbital period binary pulsar PSR B1259-63
N. Wex, S. Johnston, R. N. Manchester +3
The pulsar PSR B1259-63 is in a highly eccentric 3.4-yr orbit with the Be star SS 2883. Timing observations of this pulsar, made over a 7-yr period using the Parkes 64-m radio tele…
Triple trouble with PSR J1618-3921: Mass measurements and orbital dynamics of an eccentric millisecond pulsar
K. Grunthal, V. Venkatraman Krishnan, P. C. C. Freire +11
PSR J1618-3921 is one of five known millisecond pulsars (MSPs) in eccentric orbits (eMPSs) located in the Galactic plane, whose formation is poorly understood. Earlier studies of t…
The Thousand-Pulsar-Array programme on MeerKAT -- VIII. The subpulse modulation of 1198 pulsars
X. Song, P. Weltevrede, A. Szary +13
We report on the subpulse modulation properties of 1198 pulsars using the Thousand-Pulsar-Array programme on MeerKAT. About 35% of the analysed pulsars exhibit drifting subpulses w…