D. Perrodin
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View article: The first high frequency technosignature search survey with the Sardinia Radio Telescope
The first high frequency technosignature search survey with the Sardinia Radio Telescope Open
View article: Searches for signatures of ultralight axion dark matter in polarimetry data of the European Pulsar Timing Array
Searches for signatures of ultralight axion dark matter in polarimetry data of the European Pulsar Timing Array Open
Ultralight axionlike particles (ALPs) can be a viable solution to the dark matter problem. The scalar field associated with ALPs, coupled to the electromagnetic field acts as an active birefringent medium, altering the polarization propert…
View article: Towards an exact approach to pulsar timing
Towards an exact approach to pulsar timing Open
The pulsar timing technique, which compares the observed arrival times of electromagnetic radiation from a pulsar with the predicted arrival times derived from a theoretical model of the pulsar system, is used in pulsar astronomy to infer …
View article: The First High Frequency Technosignature Search Survey with the Sardinia Radio Telescope
The First High Frequency Technosignature Search Survey with the Sardinia Radio Telescope Open
The quest for radio signals from technologically-advanced extraterrestrial intelligence has traditionally concentrated on the vicinity of 1.4 GHz. In this paper, we extend the search to unprecedented territories, detailing our extensive ob…
View article: Periodicity search in the timing of the 25 millisecond pulsars from the second data release of the European Pulsar Timing Array
Periodicity search in the timing of the 25 millisecond pulsars from the second data release of the European Pulsar Timing Array Open
In this work, we investigated the presence of strictly periodic, as well as quasi-periodic signals, in the timing of the 25 millisecond pulsars (MSPs) from the European Pulsar Timing Array Second Data Release data set. This is especially i…
View article: Constraints on conformal ultralight dark matter couplings from the European Pulsar Timing Array
Constraints on conformal ultralight dark matter couplings from the European Pulsar Timing Array Open
Millisecond pulsars are extremely precise celestial clocks: as they rotate,\nthe beamed radio waves emitted along the axis of their magnetic field can be\ndetected with radio telescopes, which allows for tracking subtle changes in the\npul…
View article: The NANOGrav 15 yr Data Set: Chromatic Gaussian Process Noise Models for Six Pulsars
The NANOGrav 15 yr Data Set: Chromatic Gaussian Process Noise Models for Six Pulsars Open
Pulsar timing arrays (PTAs) are designed to detect low-frequency gravitational waves (GWs). GWs induce achromatic signals in PTA data, meaning that the timing delays do not depend on radio frequency. However, pulse arrival times are also a…
View article: Periodicity search in the timing of the 25 millisecond pulsars from the second data release of the European Pulsar Timing Array
Periodicity search in the timing of the 25 millisecond pulsars from the second data release of the European Pulsar Timing Array Open
In this work, we investigated the presence of strictly periodic, as well as quasi-periodic signals, in the timing of the 25 millisecond pulsars from the EPTA DR2 dataset. This is especially interesting in the context of the recent hints of…
View article: The second data release from the European Pulsar Timing Array
The second data release from the European Pulsar Timing Array Open
We present the results of a search for continuous gravitational wave signals (CGWs) in the second data release (DR2) of the European Pulsar Timing Array (EPTA) Collaboration. The most significant candidate event from this search has a grav…
View article: Modeling nonstationary noise in pulsar timing array data analysis
Modeling nonstationary noise in pulsar timing array data analysis Open
\n Contains fulltext :\n 308503.pdf (Publisher’s version ) (Open Access)\n
View article: The NANOGrav 15 yr Data Set: Chromatic Gaussian Process Noise Models for Six Pulsars
The NANOGrav 15 yr Data Set: Chromatic Gaussian Process Noise Models for Six Pulsars Open
Pulsar timing arrays (PTAs) are designed to detect low-frequency gravitational waves (GWs). GWs induce achromatic signals in PTA data, meaning that the timing delays do not depend on radio-frequency. However, pulse arrival times are also a…
View article: Modeling non stationary noise in pulsar timing array data analysis
Modeling non stationary noise in pulsar timing array data analysis Open
Pulsar Timing Array (PTA) collaborations recently reported evidence for the presence of a gravitational wave background (GWB) in their datasets. The main candidate that is expected to produce such a GWB is the population of supermassive bl…
View article: The second data release from the European Pulsar Timing Array
The second data release from the European Pulsar Timing Array Open
The European Pulsar Timing Array (EPTA) and Indian Pulsar Timing Array (InPTA) collaborations have measured a low-frequency common signal in the combination of their second and first data releases, respectively, with the correlation proper…
View article: Practical approaches to analyzing PTA data: Cosmic strings with six pulsars
Practical approaches to analyzing PTA data: Cosmic strings with six pulsars Open
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 con…
View article: Multi-wavelength observations of the lensed quasar PKS 1830$-$211 during the 2019 $γ$-ray flare
Multi-wavelength observations of the lensed quasar PKS 1830$-$211 during the 2019 $γ$-ray flare Open
PKS 1830$-$211 is a $γ$-ray emitting, high-redshift (z $= 2.507 \pm 0.002$), lensed flat-spectrum radio quasar. During the period mid-February to mid-April 2019, this source underwent a series of strong $γ$-ray flares that were detected by…
View article: Multiwavelength observations of the lensed quasar PKS 1830-211 during the 2019 γ-ray flare
Multiwavelength observations of the lensed quasar PKS 1830-211 during the 2019 γ-ray flare Open
PKS 1830 -211 is a γ-ray emitting, high-redshift (z =2.507 ± 0.002), lensed flat-spectrum radio quasar. During the period 2019 mid-February to mid-April, this source underwent a series of strong γ-ray flares that were detected by both AGIL…
View article: Second Data Release from the European Pulsar Timing Array: Challenging the Ultralight Dark Matter Paradigm
Second Data Release from the European Pulsar Timing Array: Challenging the Ultralight Dark Matter Paradigm Open
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 Eur…
View article: Variable scintillation arcs of millisecond pulsars observed with the Large European Array for Pulsars
Variable scintillation arcs of millisecond pulsars observed with the Large European Array for Pulsars Open
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 multipat…
View article: The second data release from the European Pulsar Timing Array
The second data release from the European Pulsar Timing Array Open
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 o…
View article: The second data release from the European Pulsar Timing Array
The second data release from the European Pulsar Timing Array Open
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 combina…
View article: 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 II. Customised pulsar noise models for spatially correlated gravitational waves Open
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 o…
View article: 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 I. The dataset and timing analysis Open
Pulsar timing arrays offer a probe of the low-frequency gravitational wave spectrum (1−100 nanohertz), which is intimately connected to a number of markers that can uniquely trace the formation and evolution of the Universe. We present the…
View article: 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 I. The dataset and timing analysis Open
Pulsar timing arrays offer a probe of the low-frequency gravitational wave spectrum (1−100 nanohertz), which is intimately connected to a number of markers that can uniquely trace the formation and evolution of the Universe. We present the…
View article: 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 I. The dataset and timing analysis Open
Pulsar timing arrays offer a probe of the low-frequency gravitational wave spectrum (1−100 nanohertz), which is intimately connected to a number of markers that can uniquely trace the formation and evolution of the Universe. We present the…
View article: The second data release from the European Pulsar Timing Array III. Search for gravitational wave signals
The second data release from the European Pulsar Timing Array III. Search for gravitational wave signals Open
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 combina…
View article: 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 II. Customised pulsar noise models for spatially correlated gravitational waves Open
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 o…
View article: The second data release from the European Pulsar Timing Array III. Search for gravitational wave signals
The second data release from the European Pulsar Timing Array III. Search for gravitational wave signals Open
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 combina…
View article: The second data release from the European Pulsar Timing Array V. Search for continuous gravitational wave signals
The second data release from the European Pulsar Timing Array V. Search for continuous gravitational wave signals Open
We present the results of a search for continuous gravitational wave signals (CGWs) in the second data release (DR2) of the European Pulsar Timing Array (EPTA) collaboration. The most significant candidate event from this search has a grav…
View article: The second data release from the European Pulsar Timing Array: IV. Implications for massive black holes, dark matter and the early Universe
The second data release from the European Pulsar Timing Array: IV. Implications for massive black holes, dark matter and the early Universe Open
The European Pulsar Timing Array (EPTA) and Indian Pulsar Timing Array (InPTA) collaborations have measured a low-frequency common signal in the combination of their second and first data releases respectively, with the correlation propert…
View article: The second data release from the European Pulsar Timing Array
The second data release from the European Pulsar Timing Array Open
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 datas…