Outputs (70)

An Unusual Pulse Shape Change Event in PSR J1713+0747 Observed with the Green Bank Telescope and CHIME (2024)
Journal Article
Jennings, R. J., Cordes, J. M., Chatterjee, S., McLaughlin, M. A., Demorest, P. B., Arzoumanian, Z., …Witt, C. A. (2024). An Unusual Pulse Shape Change Event in PSR J1713+0747 Observed with the Green Bank Telescope and CHIME. The Astrophysical journal, 964(2), Article 179. https://doi.org/10.3847/1538-4357/ad2930

The millisecond pulsar J1713+0747 underwent a sudden and significant pulse shape change between 2021 April 16 and 17 (MJDs 59320 and 59321). Subsequently, the pulse shape gradually recovered over the course of several months. We report the results of... Read More about An Unusual Pulse Shape Change Event in PSR J1713+0747 Observed with the Green Bank Telescope and CHIME.

The NANOGrav 15 yr Data Set: Search for Transverse Polarization Modes in the Gravitational-wave Background (2024)
Journal Article
Agazie, G., Anumarlapudi, A., Archibald, A. M., Arzoumanian, Z., Baier, J., Baker, P. T., …The NANOGrav Collaboration. (2024). The NANOGrav 15 yr Data Set: Search for Transverse Polarization Modes in the Gravitational-wave Background. Astrophysical journal. Letters, 964(1), L14. https://doi.org/10.3847/2041-8213/ad2a51

Recently we found compelling evidence for a gravitational-wave background with Hellings and Downs (HD) correlations in our 15 yr data set. These correlations describe gravitational waves as predicted by general relativity, which has two transverse po... Read More about The NANOGrav 15 yr Data Set: Search for Transverse Polarization Modes in the Gravitational-wave Background.

The NANOGrav 12.5 yr Data Set: A Computationally Efficient Eccentric Binary Search Pipeline and Constraints on an Eccentric Supermassive Binary Candidate in 3C 66B (2024)
Journal Article
Agazie, G., Arzoumanian, Z., Baker, P. T., Bécsy, B., Blecha, L., Blumer, H., …The NANOGrav Collaboration. (2024). The NANOGrav 12.5 yr Data Set: A Computationally Efficient Eccentric Binary Search Pipeline and Constraints on an Eccentric Supermassive Binary Candidate in 3C 66B. The Astrophysical journal, 963(2), 144. https://doi.org/10.3847/1538-4357/ad1f61

The NANOGrav 12.5 yr Data Set: Search for Gravitational Wave Memory (2024)
Journal Article
Agazie, G., Arzoumanian, Z., Baker, P. T., Bécsy, B., Blecha, L., Blumer, H., …The NANOGrav Collaboration. (2024). The NANOGrav 12.5 yr Data Set: Search for Gravitational Wave Memory. The Astrophysical journal, 963(1), Article 61. https://doi.org/10.3847/1538-4357/ad0726

We present the results of a Bayesian search for gravitational wave (GW) memory in the NANOGrav 12.5 yr data set. We find no convincing evidence for any gravitational wave memory signals in this data set. We find a Bayes factor of 2.8 in favor of a mo... Read More about The NANOGrav 12.5 yr Data Set: Search for Gravitational Wave Memory.

The Green Bank North Celestial Cap Survey. IX. Timing Follow-up for 128 Pulsars (2024)
Journal Article
McEwen, A. E., Swiggum, J. K., Kaplan, D. L., Tan, C. M., Meyers, B. W., Fonseca, E., …Stairs, I. H. (2024). The Green Bank North Celestial Cap Survey. IX. Timing Follow-up for 128 Pulsars. The Astrophysical journal, 962(2), Article 167. https://doi.org/10.3847/1538-4357/ad11f0

The Green Bank North Celestial Cap survey is one of the largest and most sensitive searches for pulsars and transient radio objects. Observations for the survey have finished; priorities have shifted toward long-term monitoring of its discoveries. In... Read More about The Green Bank North Celestial Cap Survey. IX. Timing Follow-up for 128 Pulsars.

A Gaussian-processes approach to fitting for time-variable spherical solar wind in pulsar timing data (2024)
Journal Article
Niţu, I. C., Keith, M. J., Tiburzi, C., Brüggen, M., Champion, D. J., Chen, S., …Vocks, C. (2024). A Gaussian-processes approach to fitting for time-variable spherical solar wind in pulsar timing data. Monthly notices of the Royal Astronomical Society, 528(2), 3304-3319. https://doi.org/10.1093/mnras/stae220

Propagation effects are one of the main sources of noise in high-precision pulsar timing. For pulsars below an ecliptic latitude of 5°, the ionized plasma in the solar wind can introduce dispersive delays of order 100 µs around solar conjunction at a... Read More about A Gaussian-processes approach to fitting for time-variable spherical solar wind in pulsar timing data.

Practical approaches to analyzing PTA data: Cosmic strings with six pulsars (2023)
Journal Article
Quelquejay Leclere, H., Auclair, P., Babak, S., Chalumeau, A., Steer, D. A., Antoniadis, J., …Wu, Z. (2023). Practical approaches to analyzing PTA data: Cosmic strings with six pulsars. Physical Review D, 108(12), Article 123527. https://doi.org/10.1103/PhysRevD.108.123527

We search for a stochastic gravitational wave background (SGWB) generated by a network of cosmic strings using six millisecond pulsars from Data Release 2 (DR2) of the European Pulsar Timing Array (EPTA). We perform a Bayesian analysis considering tw... Read More about Practical approaches to analyzing PTA data: Cosmic strings with six pulsars.

Search for gravitational wave signals from known pulsars in LIGO-Virgo O3 data using the 5n -vector ensemble method (2023)
Journal Article
D'Onofrio, L., De Rosa, R., Palomba, C., Leaci, P., Piccinni, O. J., Sequino, V., …Stappers, B. (2023). Search for gravitational wave signals from known pulsars in LIGO-Virgo O3 data using the 5n -vector ensemble method. Physical Review D, 108(12), Article 122002. https://doi.org/10.1103/PhysRevD.108.122002

The 5n-vector ensemble method is a multiple test for the targeted search of continuous gravitational waves from an ensemble of known pulsars. This method can improve the detection probability by combining the results from individually undetectable pu... Read More about Search for gravitational wave signals from known pulsars in LIGO-Virgo O3 data using the 5n -vector ensemble method.

Constraining the magnetic field geometry of the millisecond pulsar PSRJ0030+0451 from joint radio, thermal X-ray, and γ-ray emission (2023)
Journal Article
Pétri, J., Guillot, S., Guillemot, L., Cognard, I., Theureau, G., Grießmeier, J. M., …Zarka, P. (2023). Constraining the magnetic field geometry of the millisecond pulsar PSRJ0030+0451 from joint radio, thermal X-ray, and γ-ray emission. Astronomy and Astrophysics, 680, Article A93. https://doi.org/10.1051/0004-6361/202346913

Context. With the advent of multi-wavelength electromagnetic observations of neutron stars - spanning many decades in photon energies - from radio wavelengths up to X-rays and γ-rays, it has become possible to significantly constrain the geometry and... Read More about Constraining the magnetic field geometry of the millisecond pulsar PSRJ0030+0451 from joint radio, thermal X-ray, and γ-ray emission.

Pulsar scintillation through thick and thin: bow shocks, bubbles, and the broader interstellar medium (2023)
Journal Article
Ocker, S. K., Cordes, J. M., Chatterjee, S., Stinebring, D. R., Dolch, T., Giannakopoulos, C., …Reardon, D. J. (2024). Pulsar scintillation through thick and thin: bow shocks, bubbles, and the broader interstellar medium. Monthly notices of the Royal Astronomical Society, 527(3), 7568-7587. https://doi.org/10.1093/mnras/stad3683

Observations of pulsar scintillation are among the few astrophysical probes of very small-scale ( au) phenomena in the interstellar medium (ISM). In particular, characterization of scintillation arcs, including their curvature and intensity distribut... Read More about Pulsar scintillation through thick and thin: bow shocks, bubbles, and the broader interstellar medium.

How to Detect an Astrophysical Nanohertz Gravitational Wave Background (2023)
Journal Article
Bécsy, B., Cornish, N. J., Meyers, P. M., Kelley, L. Z., Agazie, G., Anumarlapudi, A., …Young, O. (2023). How to Detect an Astrophysical Nanohertz Gravitational Wave Background. The Astrophysical journal, 959(1), Article 9. https://doi.org/10.3847/1538-4357/ad09e4

Analyses of pulsar timing data have provided evidence for a stochastic gravitational wave background in the nanohertz frequency band. The most plausible source of this background is the superposition of signals from millions of supermassive black hol... Read More about How to Detect an Astrophysical Nanohertz Gravitational Wave Background.

The black widow pulsar J1641+8049 in the optical, radio, and X-rays (2023)
Journal Article
Kirichenko, A. Y., Zharikov, S. V., Karpova, A. V., Fonseca, E., Zyuzin, D. A., Shibanov, Y. A., …Swiggum, J. K. (2024). The black widow pulsar J1641+8049 in the optical, radio, and X-rays. Monthly notices of the Royal Astronomical Society, 527(3), 4563-4572. https://doi.org/10.1093/mnras/stad3391

PSR J1641+8049 is a 2 ms black widow pulsar with the 2.2 h orbital period detected in the radio and γ -rays. We performed new phase-resolved multiband photometry of PSR J1641+8049 using the OSIRIS instrument at the Gran Telescopio Canarias. The obtai... Read More about The black widow pulsar J1641+8049 in the optical, radio, and X-rays.

Second Data Release from the European Pulsar Timing Array: Challenging the Ultralight Dark Matter Paradigm (2023)
Journal Article
Smarra, C., Goncharov, B., Barausse, E., Antoniadis, J., Babak, S., Bak Nielsen, A., …European Pulsar Timing Array. (2023). Second Data Release from the European Pulsar Timing Array: Challenging the Ultralight Dark Matter Paradigm. Physical review letters, 131(17), Article 171001. https://doi.org/10.1103/PhysRevLett.131.171001

Pulsar Timing Array experiments probe the presence of possible scalar or pseudoscalar ultralight dark matter particles through decade-long timing of an ensemble of galactic millisecond radio pulsars. With the second data release of the European Pulsa... Read More about Second Data Release from the European Pulsar Timing Array: Challenging the Ultralight Dark Matter Paradigm.

The second data release from the European Pulsar Timing Array: II. Customised pulsar noise models for spatially correlated gravitational waves (2023)
Journal Article
EPTA Collaboration and InPTA Collaboration, Antoniadis, J., Arumugam, P., Arumugam, S., Babak, S., Bagchi, M., …Wu, Z. (2023). The second data release from the European Pulsar Timing Array: II. Customised pulsar noise models for spatially correlated gravitational waves. Astronomy and Astrophysics, 678, Article A49. https://doi.org/10.1051/0004-6361/202346842

Aims. The nanohertz gravitational wave background (GWB) is expected to be an aggregate signal of an ensemble of gravitational waves emitted predominantly by a large population of coalescing supermassive black hole binaries in the centres of merging g... Read More about The second data release from the European Pulsar Timing Array: II. Customised pulsar noise models for spatially correlated gravitational waves.

The second data release from the European Pulsar Timing Array: I. The dataset and timing analysis (2023)
Journal Article
Antoniadis, J., Babak, S., Bak Nielsen, A. S., Bassa, C. G., Berthereau, A., Bonetti, M., …Wu, Z. (2023). The second data release from the European Pulsar Timing Array: I. The dataset and timing analysis. Astronomy and Astrophysics, 678, Article A48. https://doi.org/10.1051/0004-6361/202346841

Pulsar timing arrays offer a probe of the low-frequency gravitational wave spectrum (1"100 nHz), which is intimately connected to a number of markers that can uniquely trace the formation and evolution of the Universe. We present the dataset and the... Read More about The second data release from the European Pulsar Timing Array: I. The dataset and timing analysis.

The second data release from the European Pulsar Timing Array: III. Search for gravitational wave signals (2023)
Journal Article
EPTA Collaboration and InPTA Collaboration:, Antoniadis, J., Arumugam, P., Arumugam, S., Babak, S., Bagchi, M., …Wu, Z. (2023). The second data release from the European Pulsar Timing Array: III. Search for gravitational wave signals. Astronomy and Astrophysics, 678, Article A50. https://doi.org/10.1051/0004-6361/202346844

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 t... Read More about The second data release from the European Pulsar Timing Array: III. Search for gravitational wave signals.

The NANOGrav 15 yr Data Set: Search for Anisotropy in the Gravitational-wave Background (2023)
Journal Article
Agazie, G., Anumarlapudi, A., Archibald, A. M., Arzoumanian, Z., Baker, P. T., Bécsy, B., …Young, O. (2023). The NANOGrav 15 yr Data Set: Search for Anisotropy in the Gravitational-wave Background. Astrophysical journal. Letters, 956(1), Article L3. https://doi.org/10.3847/2041-8213/acf4fd

The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) has reported evidence for the presence of an isotropic nanohertz gravitational-wave background (GWB) in its 15 yr data set. However, if the GWB is produced by a population of... Read More about The NANOGrav 15 yr Data Set: Search for Anisotropy in the Gravitational-wave Background.

The NANOGrav 15 yr Data Set: Constraints on Supermassive Black Hole Binaries from the Gravitational-wave Background (2023)
Journal Article
Agazie, G., Anumarlapudi, A., Archibald, A. M., Baker, P. T., Bécsy, B., Blecha, L., …Sun, J. P. (2023). The NANOGrav 15 yr Data Set: Constraints on Supermassive Black Hole Binaries from the Gravitational-wave Background. Astrophysical journal. Letters, 952(2), Article L37. https://doi.org/10.3847/2041-8213/ace18b

The NANOGrav 15 yr data set shows evidence for the presence of a low-frequency gravitational-wave background (GWB). While many physical processes can source such low-frequency gravitational waves, here we analyze the signal as coming from a populatio... Read More about The NANOGrav 15 yr Data Set: Constraints on Supermassive Black Hole Binaries from the Gravitational-wave Background.

The NANOGrav 15 yr Data Set: Bayesian Limits on Gravitational Waves from Individual Supermassive Black Hole Binaries (2023)
Journal Article
Agazie, G., Anumarlapudi, A., Archibald, A. M., Arzoumanian, Z., Baker, P. T., Bécsy, B., …Young, O. (2023). The NANOGrav 15 yr Data Set: Bayesian Limits on Gravitational Waves from Individual Supermassive Black Hole Binaries. Astrophysical journal. Letters, 951(2), Article L50. https://doi.org/10.3847/2041-8213/ace18a

Evidence for a low-frequency stochastic gravitational-wave background has recently been reported based on analyses of pulsar timing array data. The most likely source of such a background is a population of supermassive black hole binaries, the loude... Read More about The NANOGrav 15 yr Data Set: Bayesian Limits on Gravitational Waves from Individual Supermassive Black Hole Binaries.

The NANOGrav 15 yr Data Set: Detector Characterization and Noise Budget (2023)
Journal Article
Agazie, G., Anumarlapudi, A., Archibald, A. M., Arzoumanian, Z., Baker, P. T., Bécsy, B., …Young, O. (2023). The NANOGrav 15 yr Data Set: Detector Characterization and Noise Budget. Astrophysical journal. Letters, 951(1), Article L10. https://doi.org/10.3847/2041-8213/acda88

Pulsar timing arrays (PTAs) are galactic-scale gravitational wave (GW) detectors. Each individual arm, composed of a millisecond pulsar, a radio telescope, and a kiloparsecs-long path, differs in its properties but, in aggregate, can be used to extra... Read More about The NANOGrav 15 yr Data Set: Detector Characterization and Noise Budget.

The NANOGrav 15 yr Data Set: Evidence for a Gravitational-wave Background (2023)
Journal Article
Agazie, G., Anumarlapudi, A., Archibald, A. M., Arzoumanian, Z., Baker, P. T., Bécsy, B., …Stovall, K. (2023). The NANOGrav 15 yr Data Set: Evidence for a Gravitational-wave Background. Astrophysical journal. Letters, 951(1), Article L8. https://doi.org/10.3847/2041-8213/acdac6

We report multiple lines of evidence for a stochastic signal that is correlated among 67 pulsars from the 15 yr pulsar timing data set collected by the North American Nanohertz Observatory for Gravitational Waves. The correlations follow the Hellings... Read More about The NANOGrav 15 yr Data Set: Evidence for a Gravitational-wave Background.

The NANOGrav 15 yr Data Set: Observations and Timing of 68 Millisecond Pulsars (2023)
Journal Article
Agazie, G., Faisal Alam, M. F., Anumarlapudi, A., Archibald, A. M., Arzoumanian, Z., Baker, P. T., …NANOGrav Collaboration. (2023). The NANOGrav 15 yr Data Set: Observations and Timing of 68 Millisecond Pulsars. Astrophysical journal. Letters, 951(1), Article L9. https://doi.org/10.3847/2041-8213/acda9a

We present observations and timing analyses of 68 millisecond pulsars (MSPs) comprising the 15 yr data set of the North American Nanohertz Observatory for Gravitational Waves (NANOGrav). NANOGrav is a pulsar timing array (PTA) experiment that is sens... Read More about The NANOGrav 15 yr Data Set: Observations and Timing of 68 Millisecond Pulsars.

The NANOGrav 15yr Data Set: Search for Signals from New Physics (2023)
Journal Article
Afzal, A., Agazie, G., Anumarlapudi, A., Archibald, A. M., Arzoumanian, Z., Baker, P. T., …Siemens, X. (2023). The NANOGrav 15yr Data Set: Search for Signals from New Physics. Astrophysical journal. Letters, 951(1), Article L11. https://doi.org/10.3847/2041-8213/acdc91

The 15 yr pulsar timing data set collected by the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) shows positive evidence for the presence of a low-frequency gravitational-wave (GW) background. In this paper, we investigate po... Read More about The NANOGrav 15yr Data Set: Search for Signals from New Physics.

Variable scintillation arcs of millisecond pulsars observed with the Large European Array for Pulsars (2023)
Journal Article
Main, R. A., Antoniadis, J., Chen, S., Cognard, I., Hu, H., Jang, J., …Zhu, W. W. (2023). Variable scintillation arcs of millisecond pulsars observed with the Large European Array for Pulsars. Monthly notices of the Royal Astronomical Society, 525(1), 1079-1096. https://doi.org/10.1093/mnras/stad1980

We present the first large sample of scintillation arcs in millisecond pulsars (MSPs), analysing 12 sources observed with the Large European Array for Pulsars (LEAP), and the Effelsberg 100-m telescope. We estimate the delays from multipath propagati... Read More about Variable scintillation arcs of millisecond pulsars observed with the Large European Array for Pulsars.

Searching for continuous Gravitational Waves in the second data release of the International Pulsar Timing Array (2023)
Journal Article
Falxa, M., Babak, S., Baker, P. T., Bécsy, B., Chalumeau, A., Chen, S., …Collaboration, I. (2023). Searching for continuous Gravitational Waves in the second data release of the International Pulsar Timing Array. Monthly notices of the Royal Astronomical Society, 521(4), 5077-5086. https://doi.org/10.1093/mnras/stad812

The International Pulsar Timing Array 2nd data release is the combination of data sets from worldwide collaborations. In this study, we search for continuous waves: gravitational wave signals produced by individual supermassive black hole binaries in... Read More about Searching for continuous Gravitational Waves in the second data release of the International Pulsar Timing Array.

Pulsar scintillation studies with LOFAR: II. Dual-frequency scattering study of PSR J0826+2637 with LOFAR and NenuFAR (2023)
Journal Article
Wu, Z., Coles, W. A., Verbiest, J. P., Ambalappat, K. M., Tiburzi, C., Grießmeier, J. M., …Corbel, S. (2023). Pulsar scintillation studies with LOFAR: II. Dual-frequency scattering study of PSR J0826+2637 with LOFAR and NenuFAR. Monthly notices of the Royal Astronomical Society, 520(4), 5536-5543. https://doi.org/10.1093/mnras/stad429

Interstellar scattering (ISS) of radio pulsar emission can be used as a probe of the ionized interstellar medium (IISM) and causes corruptions in pulsar timing experiments. Two types of ISS phenomena (intensity scintillation and pulse broadening) are... Read More about Pulsar scintillation studies with LOFAR: II. Dual-frequency scattering study of PSR J0826+2637 with LOFAR and NenuFAR.

CHIME Discovery of a Binary Pulsar with a Massive Nondegenerate Companion (2023)
Journal Article
Andersen, B. C., Fonseca, E., McKee, J. W., Meyers, B. W., Luo, J., Tan, C. M., …Tendulkar, S. P. (2023). CHIME Discovery of a Binary Pulsar with a Massive Nondegenerate Companion. The Astrophysical journal, 943(1), Article 57. https://doi.org/10.3847/1538-4357/aca485

Of the more than 3000 radio pulsars currently known, only ∼300 are in binary systems, and only five of these consist of young pulsars with massive nondegenerate companions. We present the discovery and initial timing, accomplished using the Canadian... Read More about CHIME Discovery of a Binary Pulsar with a Massive Nondegenerate Companion.

Scattering variability detected from the circumsource medium of FRB 20190520B (2022)
Journal Article
Ocker, S. K., Cordes, J. M., Chatterjee, S., Li, D., Niu, C. H., Mckee, J. W., …Anna-Thomas, R. (2023). Scattering variability detected from the circumsource medium of FRB 20190520B. Monthly notices of the Royal Astronomical Society, 519(1), 821-830. https://doi.org/10.1093/mnras/stac3547

Fast radio bursts (FRBs) are millisecond-time-scale radio transients, the origins of which are predominantly extragalactic and likely involve highly magnetized compact objects. FRBs undergo multipath propagation, or scattering, from electron density... Read More about Scattering variability detected from the circumsource medium of FRB 20190520B.

Robust parameter estimation from pulsar timing data (2022)
Journal Article
Samajdar, A., Shaifullah, G. M., Sesana, A., Antoniadis, J., Burgay, M., Chen, S., …Van Der Wateren, E. (2022). Robust parameter estimation from pulsar timing data. Monthly notices of the Royal Astronomical Society, 517(1), 1460-1468. https://doi.org/10.1093/mnras/stac2810

Recently, global pulsar timing arrays have released results from searching for a nano-Hertz gravitational wave background signal. Although there has not been any definite evidence of the presence of such a signal in residuals of pulsar timing data ye... Read More about Robust parameter estimation from pulsar timing data.

Long-term scintillation studies of EPTA pulsars I. Observations and basic results (2022)
Journal Article
Liu, Y., Verbiest, J. P., Main, R. A., Wu, Z., Ambalappat, K. M., Champion, D. J., …Theureau, G. (2022). Long-term scintillation studies of EPTA pulsars I. Observations and basic results. Astronomy and Astrophysics, 664, Article A116. https://doi.org/10.1051/0004-6361/202142552

Context. Interstellar scintillation analysis of pulsars allows us to probe the small-scale distribution and inhomogeneities of the ionized interstellar medium. From the frequency scale of scintillation, one can estimate the geometric time delays from... Read More about Long-term scintillation studies of EPTA pulsars I. Observations and basic results.

Narrowband Searches for Continuous and Long-duration Transient Gravitational Waves from Known Pulsars in the LIGO-Virgo Third Observing Run (2022)
Journal Article
Abbott, R., Abbott, T. D., Acernese, F., Ackley, K., Adams, C., Adhikari, N., …McKee, J. (2022). Narrowband Searches for Continuous and Long-duration Transient Gravitational Waves from Known Pulsars in the LIGO-Virgo Third Observing Run. The Astrophysical journal, 932(2), Article 133. https://doi.org/10.3847/1538-4357/ac6ad0

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 search for such signals from eighteen pulsars in data from LIGO and Vir... Read More about Narrowband Searches for Continuous and Long-duration Transient Gravitational Waves from Known Pulsars in the LIGO-Virgo Third Observing Run.

The Large Dispersion and Scattering of FRB 20190520B Are Dominated by the Host Galaxy (2022)
Journal Article
Koch Ocker, S., Cordes, J. M., Chatterjee, S., Niu, C. H., Li, D., McKee, J. W., …Cruces, M. (2022). The Large Dispersion and Scattering of FRB 20190520B Are Dominated by the Host Galaxy. The Astrophysical journal, 931(2), Article 87. https://doi.org/10.3847/1538-4357/ac6504

The repeating fast radio burst FRB 20190520B is localized to a galaxy at z = 0.241, much closer than expected given its dispersion measure DM = 1205 ± 4 pc cm-3. Here we assess implications of the large DM and scattering observed from FRB 20190520B f... Read More about The Large Dispersion and Scattering of FRB 20190520B Are Dominated by the Host Galaxy.

Searches for Gravitational Waves from Known Pulsars at Two Harmonics in the Second and Third LIGO-Virgo Observing Runs (2022)
Journal Article
Abbott, R., Abe, H., Acernese, F., Ackley, K., Adhikari, N., Adhikari, R., …Weltevrede, P. (2022). Searches for Gravitational Waves from Known Pulsars at Two Harmonics in the Second and Third LIGO-Virgo Observing Runs. The Astrophysical journal, 935(1), Article 1. https://doi.org/10.3847/1538-4357/ac6acf

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 second observing run (O2). Searches were for emission from the l = m = 2... Read More about Searches for Gravitational Waves from Known Pulsars at Two Harmonics in the Second and Third LIGO-Virgo Observing Runs.

Detection of quasi-periodic micro-structure in three millisecond pulsars with the Large European Array for Pulsars (2022)
Journal Article
Liu, K., Antoniadis, J., Bassa, C. G., Chen, S., Cognard, I., Gaikwad, M., …Possenti, A. (2022). Detection of quasi-periodic micro-structure in three millisecond pulsars with the Large European Array for Pulsars. Monthly notices of the Royal Astronomical Society, 513(3), 4037-4044. https://doi.org/10.1093/mnras/stac1082

We report on the detection of quasi-periodic micro-structure in three millisecond pulsars (MSPs), PSRs J1022+1001, J2145-0750, and J1744-1134, using high time resolution data acquired with the Large European Array for Pulsars at a radio frequency of... Read More about Detection of quasi-periodic micro-structure in three millisecond pulsars with the Large European Array for Pulsars.

Probing the Local Interstellar Medium with Scintillometry of the Bright Pulsar B1133 + 16 (2022)
Journal Article
McKee, J. W., Zhu, H., Stinebring, D. R., & Cordes, J. M. (2022). Probing the Local Interstellar Medium with Scintillometry of the Bright Pulsar B1133 + 16. The Astrophysical journal, 927(1), Article 99. https://doi.org/10.3847/1538-4357/ac460b

The interstellar medium hosts a population of scattering screens, most of unknown origin. Scintillation studies of pulsars provide a sensitive tool for resolving these scattering screens and a means of measuring their properties. In this paper, we re... Read More about Probing the Local Interstellar Medium with Scintillometry of the Bright Pulsar B1133 + 16.

Dual-frequency single-pulse study of PSR B0950+08 (2022)
Journal Article
Bilous, A. V., Grießmeier, J. M., Pennucci, T., Wu, Z., Bondonneau, L., Kondratiev, V., …Ziemke, J. (2022). Dual-frequency single-pulse study of PSR B0950+08. Astronomy and Astrophysics, 658, Article A143. https://doi.org/10.1051/0004-6361/202142242

PSR B0950+08 is a bright nonrecycled pulsar whose single-pulse fluence variability is reportedly large. Based on observations at two widely separated frequencies, 55 MHz (NenuFAR) and 1.4 GHz (Westerbork Synthesis Radio Telescope), we review the prop... Read More about Dual-frequency single-pulse study of PSR B0950+08.

The International Pulsar Timing Array second data release: Search for an isotropic gravitational wave background (2022)
Journal Article
Antoniadis, J., Arzoumanian, Z., Babak, S., Bailes, M., Bak Nielsen, A. S., Baker, P. T., …Shaifullah, G. (2022). The International Pulsar Timing Array second data release: Search for an isotropic gravitational wave background. Monthly notices of the Royal Astronomical Society, 510(4), 4873-4887. https://doi.org/10.1093/mnras/stab3418

We searched for an isotropic stochastic gravitational wave background in the second data release of the International Pulsar Timing Array, a global collaboration synthesizing decadal-length pulsar-timing campaigns in North America, Europe, and Austra... Read More about The International Pulsar Timing Array second data release: Search for an isotropic gravitational wave background.

Modelling annual scintillation arc variations in PSR J1643-1224 using the Large European Array for Pulsars (2022)
Journal Article
Mall, G., Main, R. A., Antoniadis, J., Bassa, C. G., Burgay, M., Chen, S., …Zhu, W. W. (2022). Modelling annual scintillation arc variations in PSR J1643-1224 using the Large European Array for Pulsars. Monthly notices of the Royal Astronomical Society, 511(1), 1104-1114. https://doi.org/10.1093/mnras/stac096

In this work, we study variations in the parabolic scintillation arcs of the binary millisecond pulsar PSR J1643-1224 over five years using the Large European Array for Pulsars (LEAP). The two-dimensional (2D) power spectrum of scintillation, called... Read More about Modelling annual scintillation arc variations in PSR J1643-1224 using the Large European Array for Pulsars.

Localizing FRBs through VLBI with the Algonquin Radio Observatory 10 m Telescope (2022)
Journal Article
Cassanelli, T., Leung, C., Rahman, M., Vanderlinde, K., Mena-Parra, J., Cary, S., …Tendulkar, S. P. (2022). Localizing FRBs through VLBI with the Algonquin Radio Observatory 10 m Telescope. Astronomical Journal, 163(2), Article 65. https://doi.org/10.3847/1538-3881/ac3d2f

The Canadian Hydrogen Intensity Mapping Experiment (CHIME)/FRB experiment has detected thousands of fast radio bursts (FRBs) due to its sensitivity and wide field of view; however, its low angular resolution prevents it from localizing events to thei... Read More about Localizing FRBs through VLBI with the Algonquin Radio Observatory 10 m Telescope.

Study of 72 Pulsars Discovered in the PALFA Survey: Timing Analysis, Glitch Activity, Emission Variability, and a Pulsar in an Eccentric Binary (2022)
Journal Article
Parent, E., Sewalls, H., Freire, P. C., Matheny, T., Lyne, A. G., Perera, B. B., …Zhu, W. W. (2022). Study of 72 Pulsars Discovered in the PALFA Survey: Timing Analysis, Glitch Activity, Emission Variability, and a Pulsar in an Eccentric Binary. The Astrophysical journal, 924(2), Article 135. https://doi.org/10.3847/1538-4357/ac375d

We present new discoveries and results from long-term timing of 72 pulsars discovered in the Pulsar Arecibo L-band Feed Array (PALFA) survey, including precise determination of astrometric and spin parameters, and flux density and scatter broadening... Read More about Study of 72 Pulsars Discovered in the PALFA Survey: Timing Analysis, Glitch Activity, Emission Variability, and a Pulsar in an Eccentric Binary.

Common-red-signal analysis with 24-yr high-precision timing of the European Pulsar Timing Array: inferences in the stochastic gravitational-wave background search (2021)
Journal Article
Chen, S., Caballero, R. N., Guo, Y. J., Chalumeau, A., Liu, K., Shaifullah, G., …Xu, H. (2021). Common-red-signal analysis with 24-yr high-precision timing of the European Pulsar Timing Array: inferences in the stochastic gravitational-wave background search. Monthly notices of the Royal Astronomical Society, 508(4), 4970-4993. https://doi.org/10.1093/mnras/stab2833

We present results from the search for a stochastic gravitational-wave background (GWB) as predicted by the theory of General Relativity using six radio millisecond pulsars from the Data Release 2 (DR2) of the European Pulsar Timing Array (EPTA) cove... Read More about Common-red-signal analysis with 24-yr high-precision timing of the European Pulsar Timing Array: inferences in the stochastic gravitational-wave background search.

Removal and replacement of interference in tied-array radio pulsar observations using the spectral kurtosis estimator (2021)
Journal Article
Purver, M., Bassa, C. G., Cognard, I., Janssen, G. H., Karuppusamy, R., Kramer, M., …Stappers, B. W. (2022). Removal and replacement of interference in tied-array radio pulsar observations using the spectral kurtosis estimator. Monthly notices of the Royal Astronomical Society, 510(2), 1597-1611. https://doi.org/10.1093/mnras/stab3434

We describe how to implement the spectral kurtosis method of interference removal (zapping) on a digitized signal of averaged power values. Spectral kurtosis is a hypothesis test, analogous to the t-test, with a null hypothesis that the amplitudes fr... Read More about Removal and replacement of interference in tied-array radio pulsar observations using the spectral kurtosis estimator.

Noise analysis in the European Pulsar Timing Array data release 2 and its implications on the gravitational-wave background search (2021)
Journal Article
Chalumeau, A., Babak, S., Petiteau, A., Chen, S., Samajdar, A., Caballero, R. N., …Xu, H. (2022). Noise analysis in the European Pulsar Timing Array data release 2 and its implications on the gravitational-wave background search. Monthly notices of the Royal Astronomical Society, 509(4), 5538-5558. https://doi.org/10.1093/mnras/stab3283

The European Pulsar Timing Array (EPTA) collaboration has recently released an extended data set for six pulsars (DR2) and reported evidence for a common red noise signal. Here we present a noise analysis for each of the six pulsars. We consider seve... Read More about Noise analysis in the European Pulsar Timing Array data release 2 and its implications on the gravitational-wave background search.

PSR J2222-0137: I. Improved physical parameters for the system (2021)
Journal Article
Guo, Y. J., Freire, P. C., Guillemot, L., Kramer, M., Zhu, W. W., Wex, N., …Theureau, G. (2021). PSR J2222-0137: I. Improved physical parameters for the system. Astronomy and Astrophysics, 654, Article A16. https://doi.org/10.1051/0004-6361/202141450

Context. The PSR J2222-0137 binary system has a set of features that make it a unique laboratory for tests of gravity theories. Aims. To fully exploit the system's potential for these tests, we aim to improve the measurements of its physical paramete... Read More about PSR J2222-0137: I. Improved physical parameters for the system.

Strong-field gravity tests with the double pulsar (2021)
Journal Article
Kramer, M., Stairs, I. H., Manchester, R. N., Wex, N., Deller, A. T., Coles, W. A., …Theureau, G. (2021). Strong-field gravity tests with the double pulsar. Physical Review X, 11(4), Article 041050. https://doi.org/10.1103/PhysRevX.11.041050

Continued timing observations of the double pulsar PSR J0737-3039A/B, which consists of two active radio pulsars (A and B) that orbit each other with a period of 2.45 h in a mildly eccentric (e=0.088) binary system, have led to large improvements in... Read More about Strong-field gravity tests with the double pulsar.

Profile changes associated with dispersion measure events in PSR J1713+0747 (2021)
Journal Article
Lin, F. X., Lin, H. H., Luo, J., Main, R., McKee, J., Pen, U. L., …van Kerkwijk, M. H. (2021). Profile changes associated with dispersion measure events in PSR J1713+0747. Monthly notices of the Royal Astronomical Society, 508(1), 1115-1127. https://doi.org/10.1093/mnras/stab2529

Propagation effects in the interstellar medium and intrinsic profile changes can cause variability in the timing of pulsars, which limits the accuracy of fundamental science done via pulsar timing. One of the best timing pulsars, PSR J1713+0747, has... Read More about Profile changes associated with dispersion measure events in PSR J1713+0747.

Pulsars with NenuFAR: Backend and pipelines (2021)
Journal Article
Bondonneau, L., Grießmeier, J. M., Theureau, G., Cognard, I., Brionne, M., Kondratiev, V., …Tasse, C. (2021). Pulsars with NenuFAR: Backend and pipelines. Astronomy and Astrophysics, 652, https://doi.org/10.1051/0004-6361/202039339

Context. NenuFAR (New extension in Nançay upgrading LOFAR) is a new radio telescope developed and built on the site of the Nançay Radio Observatory. It is designed to observe the largely unexplored frequency window from 10 to 85 MHz, offering a high... Read More about Pulsars with NenuFAR: Backend and pipelines.

Refined mass and geometric measurements of the high-mass PSR J0740+6620 (2021)
Journal Article
Fonseca, E., Cromartie, H. T., Pennucci, T. T., Ray, P. S., Kirichenko, A. Y., Ransom, S. M., …Zhu, W. W. (2021). Refined mass and geometric measurements of the high-mass PSR J0740+6620. Astrophysical journal. Letters, 915(1), Article L12. https://doi.org/10.3847/2041-8213/ac03b8

We report results from continued timing observations of PSR J0740+6620, a high-mass, 2.8 ms radio pulsar in orbit with a likely ultracool white dwarf companion. Our data set consists of combined pulse arrival-time measurements made with the 100 m Gre... Read More about Refined mass and geometric measurements of the high-mass PSR J0740+6620.

The CHIME Pulsar Project: System Overview (2021)
Journal Article
Amiri, M., Bandura, K. M., Boyle, P. J., Brar, C., Cliche, J. F., Crowter, K., …Wang, X. (2021). The CHIME Pulsar Project: System Overview. Astrophysical Journal Supplement, 255(1), Article 5. https://doi.org/10.3847/1538-4365/abfdcb

We present the design, implementation, and performance of the digital pulsar observing system constructed for the Canadian Hydrogen Intensity Mapping Experiment (CHIME). Using accelerated computing, this system processes independent, digitally steere... Read More about The CHIME Pulsar Project: System Overview.

Dispersion measure variability for 36 millisecond pulsars at 150 MHz with LOFAR (2020)
Journal Article
Donner, J. Y., Verbiest, J. P., Tiburzi, C., Osłowski, S., Künsemöller, J., Bak Nielsen, A. S., …Vocks, C. (2020). Dispersion measure variability for 36 millisecond pulsars at 150 MHz with LOFAR. Astronomy and Astrophysics, 644, Article A153. https://doi.org/10.1051/0004-6361/202039517

Context. Radio pulses from pulsars are affected by plasma dispersion, which results in a frequency-dependent propagation delay. Variations in the magnitude of this effect lead to an additional source of red noise in pulsar timing experiments, includi... Read More about Dispersion measure variability for 36 millisecond pulsars at 150 MHz with LOFAR.

A precise mass measurement of PSR J2045 + 3633 (2020)
Journal Article
McKee, J. W., Freire, P. C., Berezina, M., Champion, D. J., Cognard, I., Graikou, E., …Theureau, G. (2020). A precise mass measurement of PSR J2045 + 3633. Monthly notices of the Royal Astronomical Society, 499(3), 4082-4096. https://doi.org/10.1093/mnras/staa2994

We present the results of a timing analysis undertaken with the goal of obtaining an improved mass measurement of the recycled pulsar J2045 + 3633. Using regular high-cadence observations with the Effelsberg, Nançay, and Lovell radio telescopes, toge... Read More about A precise mass measurement of PSR J2045 + 3633.

Measuring interstellar delays of PSR J0613-0200 over 7 yr, using the Large European Array for Pulsars (2020)
Journal Article
Main, R. A., Sanidas, S. A., Antoniadis, J., Bassa, C., Chen, S., Cognard, I., …Zhu, W. W. (2020). Measuring interstellar delays of PSR J0613-0200 over 7 yr, using the Large European Array for Pulsars. Monthly notices of the Royal Astronomical Society, 499(1), 1468-1479. https://doi.org/10.1093/mnras/staa2955

Using data from the Large European Array for Pulsars, and the Effelsberg telescope, we study the scintillation parameters of the millisecond pulsar PSR J0613-0200 over a 7 yr timespan. The 'secondary spectrum' - the 2D power spectrum of scintillation... Read More about Measuring interstellar delays of PSR J0613-0200 over 7 yr, using the Large European Array for Pulsars.

A pulsar-based time-scale from the International Pulsar Timing Array (2019)
Journal Article
Hobbs, G., Guo, L., Caballero, R. N., Coles, W., Lee, K. J., Manchester, R. N., …Zhu, X. J. (2020). A pulsar-based time-scale from the International Pulsar Timing Array. Monthly notices of the Royal Astronomical Society, 491(4), 5951-5965. https://doi.org/10.1093/mnras/stz3071

We have constructed a new time-scale, TT(IPTA16), based on observations of radio pulsars presented in the first data release from the International Pulsar Timing Array (IPTA). We used two analysis techniques with independent estimates of the noise mo... Read More about A pulsar-based time-scale from the International Pulsar Timing Array.

The International Pulsar Timing Array: second data release (2019)
Journal Article
Perera, B. B., DeCesar, M. E., Demorest, P. B., Kerr, M., Lentati, L., Nice, D. J., …Zhu, X. J. (2019). The International Pulsar Timing Array: second data release. Monthly notices of the Royal Astronomical Society, 490(4), 4666-4687. https://doi.org/10.1093/mnras/stz2857

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 Pulsar Timing Array, the North American Nanohertz Observatory for Gravit... Read More about The International Pulsar Timing Array: second data release.

A detailed study of giant pulses from PSR B1937+21 using the Large European Array for Pulsars (2018)
Journal Article
McKee, J. W., Stappers, B. W., Bassa, C. G., Chen, S., Cognard, I., Gaikwad, M., …Zhu, W. W. (2019). A detailed study of giant pulses from PSR B1937+21 using the Large European Array for Pulsars. Monthly notices of the Royal Astronomical Society, 483(4), 4784-4802. https://doi.org/10.1093/mnras/sty3058

We have studied 4265 giant pulses (GPs) from the millisecond pulsar B1937+21; the largest-ever sample gathered for this pulsar, in observations made with the Large European Array for Pulsars. The pulse energy distribution of GPs associated with the i... Read More about A detailed study of giant pulses from PSR B1937+21 using the Large European Array for Pulsars.

Tests of gravitational symmetries with pulsar binary J1713+0747 (2018)
Journal Article
Zhu, W. W., Desvignes, G., Wex, N., Caballero, R. N., Champion, D. J., Demorest, P. B., …Tiburzi, C. (2019). Tests of gravitational symmetries with pulsar binary J1713+0747. Monthly notices of the Royal Astronomical Society, 482(3), 3249-3260. https://doi.org/10.1093/mnras/sty2905

Symmetries play a fundamental role in modern theories of gravity. The strong equivalence principle (SEP) constitutes a collection of gravitational symmetries which are all implemented by general relativity. Alternative theories, however, are generall... Read More about Tests of gravitational symmetries with pulsar binary J1713+0747.

Studying the Solar system with the International Pulsar Timing Array (2018)
Journal Article
Caballero, R. N., Guo, Y. J., Lee, K. J., Lazarus, P., Champion, D. J., Desvignes, G., …Zhu, W. W. (2018). Studying the Solar system with the International Pulsar Timing Array. Monthly notices of the Royal Astronomical Society, 481(4), 5501-5516. https://doi.org/10.1093/MNRAS/STY2632

Pulsar-timing analyses are sensitive to errors in the Solar-system ephemerides (SSEs) that timing models utilize to estimate the location of the Solar-system barycentre, the quasi-inertial reference frame to which all recorded pulse times-of-arrival... Read More about Studying the Solar system with the International Pulsar Timing Array.

Improving timing sensitivity in the microhertz frequency regime: limits from PSR J1713+0747 on gravitational waves produced by supermassive black hole binaries (2018)
Journal Article
Perera, B. B., Stappers, B. W., Babak, S., Keith, M. J., Antoniadis, J., Bassa, C. G., …Taylor, S. R. (2018). Improving timing sensitivity in the microhertz frequency regime: limits from PSR J1713+0747 on gravitational waves produced by supermassive black hole binaries. Monthly notices of the Royal Astronomical Society, 478(1), 218-227. https://doi.org/10.1093/mnras/sty1116

We search for continuous gravitational waves (CGWs) produced by individual supermassive black hole binaries in circular orbits using high-cadence timing observations of PSR J1713+0747. We observe this millisecond pulsar using the telescopes in the Eu... Read More about Improving timing sensitivity in the microhertz frequency regime: limits from PSR J1713+0747 on gravitational waves produced by supermassive black hole binaries.

Temporal variations in scattering and dispersion measure in the Crab Pulsar and their effect on timing precision (2018)
Journal Article
McKee, J. W., Lyne, A. G., Stappers, B. W., Bassa, C. G., & Jordan, C. A. (2018). Temporal variations in scattering and dispersion measure in the Crab Pulsar and their effect on timing precision. Monthly notices of the Royal Astronomical Society, 479(3), 4216-4224. https://doi.org/10.1093/mnras/sty1727

We have measured variations in scattering time-scales in the Crab Pulsar over a 30-yr period, using observations made at 610 MHz with the 42-ft telescope at Jodrell Bank Observatory. Over more recent years, where regular Lovell Telescope observations... Read More about Temporal variations in scattering and dispersion measure in the Crab Pulsar and their effect on timing precision.

The beamformer and correlator for the Large European Array for Pulsars (2017)
Journal Article
Smits, R., Bassa, C. G., Janssen, G. H., Karuppusamy, R., Kramer, M., Lee, K. J., …Zhu, W. W. (2017). The beamformer and correlator for the Large European Array for Pulsars. Astronomy and Computing, 19, 66-74. https://doi.org/10.1016/j.ascom.2017.02.002

The Large European Array for Pulsars combines Europe's largest radio telescopes to form a tied-array telescope that provides high signal-to-noise observations of millisecond pulsars (MSPs) with the objective to increase the sensitivity of detecting l... Read More about The beamformer and correlator for the Large European Array for Pulsars.

Timing of 29 Pulsars Discovered in the PALFA Survey (2017)
Journal Article
Lyne, A. G., Stappers, B. W., Bogdanov, S., Ferdman, R. D., Freire, P. C., Kaspi, V. M., …Machenschalk, B. (2017). Timing of 29 Pulsars Discovered in the PALFA Survey. The Astrophysical journal, 834(2), Article 137. https://doi.org/10.3847/1538-4357/834/2/137

We report on the discovery and timing observations of 29 distant long-period pulsars found in the ongoing Arecibo L-band Feed Array pulsar survey. Following discovery with the Arecibo Telescope, confirmation and timing observations of these pulsars o... Read More about Timing of 29 Pulsars Discovered in the PALFA Survey.

Variability, polarimetry, and timing properties of single pulses from PSR J1713+0747 using the Large European Array for Pulsars (2016)
Journal Article
Liu, K., Bassa, C. G., Janssen, G. H., Karuppusamy, R., McKee, J., Kramer, M., …Zhu, W. W. (2016). Variability, polarimetry, and timing properties of single pulses from PSR J1713+0747 using the Large European Array for Pulsars. Monthly notices of the Royal Astronomical Society, 463(3), 3239-3248. https://doi.org/10.1093/mnras/stw2223

Single pulses preserve information about the pulsar radio emission and propagation in the pulsar magnetosphere, and understanding the behaviour of their variability is essential for estimating the fundamental limit on the achievable pulsar timing pre... Read More about Variability, polarimetry, and timing properties of single pulses from PSR J1713+0747 using the Large European Array for Pulsars.

21 year timing of the black-widow pulsar J2051-0827 (2016)
Journal Article
Shaifullah, G., Verbiest, J. P., Freire, P. C., Tauris, T. M., Wex, N., Oslowski, S., …Tiburzi, C. (2016). 21 year timing of the black-widow pulsar J2051-0827. Monthly notices of the Royal Astronomical Society, 462(1), 1029-1038. https://doi.org/10.1093/mnras/stw1737

Timing results for the black-widow pulsar J2051-0827 are presented, using a 21 year data set from four European Pulsar Timing Array telescopes and the Parkes radio telescope. This data set, which is the longest published to date for a black-widow sys... Read More about 21 year timing of the black-widow pulsar J2051-0827.

A glitch in the millisecond pulsar J0613-0200 (2016)
Journal Article
McKee, J. W., Janssen, G. H., Stappers, B. W., Lyne, A. G., Caballero, R. N., Lentati, L., …Verbiest, J. P. (2016). A glitch in the millisecond pulsar J0613-0200. Monthly notices of the Royal Astronomical Society, 461(3), 2809-2817. https://doi.org/10.1093/mnras/stw1442

We present evidence for a small glitch in the spin evolution of the millisecond pulsar J0613-0200, using the EPTA Data Release 1.0, combined with Jodrell Bank analogue filterbank times of arrival (TOAs) recorded with the Lovell telescope and Effelsbe... Read More about A glitch in the millisecond pulsar J0613-0200.

A millisecond pulsar in an extremely wide binary system (2016)
Journal Article
Bassa, C. G., Janssen, G. H., Stappers, B. W., Tauris, T. M., Wevers, T., Jonker, P. G., …Zhu, W. W. (2016). A millisecond pulsar in an extremely wide binary system. Monthly notices of the Royal Astronomical Society, 460(2), 2207-2222. https://doi.org/10.1093/mnras/stw1134

We report on 22 yr of radio timing observations of the millisecond pulsar J1024-0719 by the telescopes participating in the European Pulsar Timing Array (EPTA). These observations reveal a significant second derivative of the pulsar spin frequency an... Read More about A millisecond pulsar in an extremely wide binary system.

The noise properties of 42 millisecond pulsars from the European Pulsar Timing Array and their impact on gravitational-wave searches (2016)
Journal Article
Caballero, R. N., Lee, K. J., Lentati, L., Desvignes, G., Champion, D. J., Verbiest, J. P., …Vecchio, A. (2016). The noise properties of 42 millisecond pulsars from the European Pulsar Timing Array and their impact on gravitational-wave searches. Monthly notices of the Royal Astronomical Society, 457(4), 4421-4440. https://doi.org/10.1093/mnras/stw179

The sensitivity of Pulsar Timing Arrays to gravitational waves (GWs) depends on the noise present in the individual pulsar timing data. Noise may be either intrinsic or extrinsic to the pulsar. Intrinsic sources of noise will include rotational insta... Read More about The noise properties of 42 millisecond pulsars from the European Pulsar Timing Array and their impact on gravitational-wave searches.

High-precision timing of 42 millisecond pulsars with the European Pulsar Timing Array (2016)
Journal Article
Desvignes, G., Caballero, R. N., Lentati, L., Verbiest, J. P., Champion, D. J., Stappers, B. W., …Vecchio, A. (2016). High-precision timing of 42 millisecond pulsars with the European Pulsar Timing Array. Monthly notices of the Royal Astronomical Society, 458(3), 3341-3380. https://doi.org/10.1093/mnras/stw483

We report on the high-precision timing of 42 radio millisecond pulsars (MSPs) observed by the European Pulsar Timing Array (EPTA). This EPTA Data Release 1.0 extends up to mid-2014 and baselines range from 7-18 yr. It forms the basis for the stochast... Read More about High-precision timing of 42 millisecond pulsars with the European Pulsar Timing Array.

From spin noise to systematics: stochastic processes in the first International Pulsar Timing Array data release (2016)
Journal Article
Lentati, L., Shannon, R. M., Coles, W. A., Verbiest, J. P., van Haasteren, R., Ellis, J. A., …Zhu, X. J. (2016). From spin noise to systematics: stochastic processes in the first International Pulsar Timing Array data release. Monthly notices of the Royal Astronomical Society, 458(2), 2161-2187. https://doi.org/10.1093/mnras/stw395

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 selection to determine the optimal description of the stochastic signa... Read More about From spin noise to systematics: stochastic processes in the first International Pulsar Timing Array data release.

The International Pulsar Timing Array: First data release (2016)
Journal Article
Verbiest, J. P., Lentati, L., Hobbs, G., Van Haasteren, R., Demorest, P. B., Janssen, G. H., …Zhu, X. J. (2016). The International Pulsar Timing Array: First data release. Monthly notices of the Royal Astronomical Society, 458(2), 1267-1288. https://doi.org/10.1093/mnras/stw347

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 milliseconds can be used to detect correlated signals such as those cau... Read More about The International Pulsar Timing Array: First data release.

LEAP: the Large European Array for Pulsars (2015)
Journal Article
Bassa, C. G., Janssen, G. H., Karuppusamy, R., Kramer, M., Lee, K. J., Liu, K., …Stappers, B. W. (2016). LEAP: the Large European Array for Pulsars. Monthly notices of the Royal Astronomical Society, 456(2), 2196-2209. https://doi.org/10.1093/mnras/stv2755

The Large European Array for Pulsars (LEAP) is an experiment that harvests the collective power of Europe's largest radio telescopes in order to increase the sensitivity of high-precision pulsar timing. As part of the ongoing effort of the European P... Read More about LEAP: the Large European Array for Pulsars.