Conveners
Day 2: Timing + Data Combination + Noise Analysis
- Jędrzej Jawor (MPIfR)
Day 2: Astrophysics and Interpretation of Gravitational Waves
- Sara Manzini (APC - Université Paris Cité)
Day 2: Physics of the ISM and Noise Modelling
- Golam Shaifullah (Dipartimento di Fisica ``G. Occhialini", Universit{\'a} degli Studi di Milano-Bicocca, Piazza della Scienza 3, I-20126 Milano, Italy)
Pulsars generally exhibit stable integrated pulse profiles, making them
powerful tools for precision timing experiments. While short-term vari-
ability, such as mode-changing and nulling, is known in young pulsars,
studies suggest that long-term profile changes may also occur, potentially
correlated with the spin-down rate. Millisecond pulsars (MSPs), typi-
cally more stable, have shown...
ARGOS-CDS is the design study phase for the planned ARGOS telescope, a leading-edge, low-cost radio interferometer to be built in Europe. It will perform continuous wide-field monitoring in between 1 GHz and 3 GHz, and high-cadence, high-SNR observations of all PTA pulsars as the most sensitive instrument in the EPTA.
The pulsar science pipeline, arpa, for ARGOS is being developed as new,...
Pulsar Timing Arrays (PTAs) are approaching the sensitivity required to make a 5-σ detection of the nanohertz stochastic gravitational wave background (GWB), making it crucial to develop a comprehensive understanding of our data and of the outcomes of our analysis pipelines. Thus, it becomes essential to understand a counterintuitive feature revealed in the recent results from the European...
Building on Iraci et al. (2024), we study the impact of our main modelling routines to mitigate the effects of the ionized interstellar medium during the search for the Gravitational Wave Background (GWB) with Pulsar Timing Arrays (PTAs). To this scope, we use synthetic PTA datasets and model the DM variations as Gaussian Processes (DM GP) using the Enterprise software to test the consistency...
In Pulsar Timing Array (PTA) data analysis, noise is typically assumed to be Gaussian, and the marginalized likelihood has a well-established analytical form derived within the framework of Gaussian processes. However, this Gaussianity assumption may break down for certain classes of astrophysical and cosmological signals, particularly for a gravitational wave background (GWB) generated by a...
In this talk, we will discuss on the recent updates on LOFAR and NenuFAR.
LOFAR’s beamformed mode enables diverse science cases and data collected in this mode proved to be fundamental for the latest EPTA data release, DR2low (Iraci and Chalumeau et al 2025).
However, polarization analysis in beamformed mode has remained largely out of reach due to the absence of a reliable polarization calibration framework.
Here, I will present our cutting-edge polarization...
Low-frequency radio data are highly valuable for studying propagation effects in pulsar signals, such as dispersion measure (DM) variations. In this work, we combine for the first time observations from LOFAR (100–200 MHz) and NenuFAR (30–90 MHz) with EPTA DR2new+ data to build a new dataset, the so-called DR2low. It consists of 12 pulsars observed over a time span of ∼11 years with radio...
