S. A. Sanidas
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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: 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 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: A study of two FRBs with low polarization fractions localized with the MeerTRAP transient buffer system
A study of two FRBs with low polarization fractions localized with the MeerTRAP transient buffer system Open
Localization of fast radio bursts (FRBs) to arcsecond and subarcsecond precision maximizes their potential as cosmological probes. To that end, FRB detection instruments are deploying triggered complex-voltage capture systems to localize F…
View article: A study of two FRBs with low polarization fractions localized with the MeerTRAP transient buffer system
A study of two FRBs with low polarization fractions localized with the MeerTRAP transient buffer system Open
Localisation of fast radio bursts (FRBs) to arcsecond and sub-arcsecond precision maximizes their potential as cosmological probes. To that end, FRB detection instruments are deploying triggered complex-voltage capture systems to localize …
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: 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: FRB 20210405I: a nearby Fast Radio Burst localized to sub-arcsecond precision with MeerKAT
FRB 20210405I: a nearby Fast Radio Burst localized to sub-arcsecond precision with MeerKAT Open
We present the first sub-arcsecond localized Fast Radio Burst (FRB) detected using MeerKAT. FRB 20210405I was detected in the incoherent beam using the MeerTRAP pipeline on 2021 April 05 with a signal to noise ratio of 140.8 and a dispersi…
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: A sample of fast radio bursts discovered and localized with MeerTRAP at the <i>MeerKAT</i> telescope
A sample of fast radio bursts discovered and localized with MeerTRAP at the <i>MeerKAT</i> telescope Open
We present a sample of well-localized fast radio bursts (FRBs) discovered by the MeerTRAP project at the MeerKAT telescope in South Africa. We discovered the three FRBs in single coherent tied-array beams and localized them to an area of ∼…
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…
View article: Discovery of an extremely intermittent periodic radio source
Discovery of an extremely intermittent periodic radio source Open
We report the serendipitous discovery of an extremely intermittent radio pulsar, PSR J1710−3452, with a relatively long spin period of 10.4 s. The object was discovered through the detection of 97 bright radio pulses in only one out of 66 …
View article: A subarcsec localized fast radio burst with a significant host galaxy dispersion measure contribution
A subarcsec localized fast radio burst with a significant host galaxy dispersion measure contribution Open
We present the discovery of FRB 20210410D with the MeerKAT radio interferometer in South Africa, as part of the MeerTRAP commensal project. FRB 20210410D has a dispersion measure DM = 578.78 ± 2 ${\rm pc \, cm^{-3}}$ and was localized to s…
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, analysing 12 sources observed with the Large European Array for Pulsars (LEAP), and the Effelsberg 100\,m telescope. We estimate the delays from multipath prop…
View article: Discovery of an Extremely Intermittent Periodic Radio Source
Discovery of an Extremely Intermittent Periodic Radio Source Open
We report the serendipitous discovery of an extremely intermittent radio pulsar, PSR J1710-3452, with a relatively long spin period of 10.4 s. The object was discovered through the detection of 97 bright radio pulses in only one out of 66 …
View article: A sub-arcsec localised fast radio burst with a significant host galaxy dispersion measure contribution
A sub-arcsec localised fast radio burst with a significant host galaxy dispersion measure contribution Open
We present the discovery of FRB 20210410D, with the MeerKAT radio interferometer in South Africa, as part of the MeerTRAP commensal project. FRB 20210410D has a dispersion measure DM = 578.78 +/- 2 pc cm-3, and was localised to sub-arcsec …