EMRI Search and Inference within the LISA Global Fit - Part II

13 juil. 2026, 08:00 → 17 juil. 2026, 18:00 Asia/Singapore

Coriander Room

Alvin Chua (National University of Singapore), Josh Mathews (National University of Singapore), Quentin Baghi (APC | Université Paris Cité), Shubham Kejriwal (National University of Singapore), Stanislav Babak (APC)

The follow up meeting to EMRI Search and Inference within the LISA Global Fit - Part I held on 23-26/06/25.

Part II will be held in the National University of Singapore on the 13-17/07/26 in the Coriander Room, Shaw Foundation Alumni House, 11 Kent Ridge Drive, Singapore 119244 (map). See local information.

When compact objects such as neutron stars or stellar-mass black holes venture into the vicinity of giant black holes, they can form highly asymmetric and strongly relativistic binary systems known as extreme-mass-ratio inspirals (EMRIs). EMRIs are some of the most promising gravitational-wave sources that the upcoming space mission LISA might observe, but also some of the most difficult to model, detect and characterise.

The aim of this workshop is to bring together experts in EMRI science and LISA data analysis, to assess the state of the art in the field and to further develop plans for the optimal extraction of science from such sources. The workshop will focus mainly on data analysis techniques for EMRI search and inference in the broader context of the LISA global fit, but will naturally extend to adjacent topics such as the construction of accurate and efficient waveform templates, and the impact of astrophysical environments on EMRI modelling and interpretation.

This workshop is supported by the Université Paris Cité - National University of Singapore (Paris-NUS) research grant 2024-01-RESEARCH/UPCité-NUS (IdEx code ANR-18-IDEX-0001).

lun. 13 juillet

09:00 → 09:30 Registration & Welcome Coffee

09:30 → 09:45 Workshop opening, logistics, scientific goals

Président de session: Alvin Chua (National University of Singapore)

09:45 → 10:45 EMRI Models for Data Analysis

Orateur: Adam Pound (University of Southampton)

10:45 → 11:15 Coffee Break

11:15 → 11:45 Rapid waveform generation strategies for EMRI search and parameter inference

Orateur: Christian Chapman-Bird (University of Glasgow)

11:45 → 12:15 Waveform modeling and data analysis for EMRIs with a spinning secondary

Orateur: Gabriel Andres Piovano (University College Dublin)

12:15 → 13:45 Lunch Break

13:45 → 14:45 Discussion: Traditional EMRI waveform modelling

Présidents de session: Susanna Barsanti, Viktor Skoupý

14:45 → 15:00 Fast, batched trajectory generation for EMRIs using JAX

Orateur: Bert Depoorter (KU Leuven - Royal Observatory of Belgium)

15:00 → 15:15 Tfwaves, a Python package for time-frequency representation of LISA signals

Orateurs: Gaël Servignat (APC), Saptarshi GHOSH (Astroparticule et Cosmologie, Université Paris Cité)

15:15 → 15:45 Coffee Break

15:45 → 16:00 Observing the Milky Way Nucleus with LISA

Orateur: Lukas Arda

16:00 → 16:15 Characterizing Bias in Multi-Source Gravitational Wave Inference with LISA

Orateur: Rishav Agrawal

16:15 → 17:15 Discussion: Adapting models for data analysis

Président de session: Dr Josh Mathews (National University of Singapore)

mar. 14 juillet

09:30 → 10:30 Machine Learning for EMRI science

Orateur: Jonathan Gair (AEI Potsdam)

10:30 → 11:00 Coffee Break

11:00 → 11:30 Multiscale Representations of Extreme-Mass-Ratio Inspiral Signals for Identification

Orateur: Xueting Zhang

11:30 → 12:30 Discussion: ML methods in forward models and data analysis

Présidents de session: Minghui Du (Chinese Academy of Science), Shubham Kejriwal (National University of Singapore)

12:30 → 14:00 Lunch

14:00 → 14:30 Learning Robust Models for Multi-Source Gravitational-Wave Analysis

Orateur: He Wang

14:30 → 14:45 A deep learning framework for amplitude generation of general EMRIs

Orateur: Jiandong Zhang

14:45 → 15:00 Toward Efficient and Accurate EMRI Parameter Estimation: A Machine Learning-Enhanced MCMC Framework

Orateur: Bo Liang

15:00 → 15:30 Coffee Break

15:30 → 16:30 Discussion: ML methods in global fit: scalability, validation and integration with classical pipelines

Président de session: Alvin Chua (National University of Singapore)

16:30 → 16:45 (Remote) Deep Learning Denoising for Extreme-Mass-Ratio Inspiral Searches in Low-SNR LISA Data

Orateur: Stefan Strub

16:45 → 17:00 TBD

Orateur: Khurshid Karshiboev

mer. 15 juillet

09:30 → 10:00 Missing data and missing matter

Orateur: Philippa Cole

10:00 → 10:30 Single-harmonic search for extreme mass-ratio inspirals

Orateur: Lorenzo Speri (European Space Agency)

10:30 → 11:00 Coffee Break

11:00 → 11:15 Searching for EMRIs with the one-stop function

Orateur: Davendra Hassan

11:15 → 11:30 Hierarchical CPSO Search for Extreme-Mass-Ratio Inspirals in Space-Based Gravitational-Wave Detector Data

Orateur: Haocheng Hu

11:30 → 11:45 A Hierarchical Strategy for Searching Extreme Mass-Ratio Inspiral Signals Via Reduced Dimensionality Likelihood and Particle Swarm Optimization

Orateur: Xiaobo Zou

11:45 → 12:00 Divide and infer: semi-coherent methods for robust gravitational-wave analysis

Orateur: Shubham Kejriwal (National University of Singapore)

12:00 → 13:30 Lunch

13:30 → 14:30 Discussion: DDPC EMRI Search (members-only closed session)

Président de session: Jonathan Gair (AEI Potsdam)

18:00 → 22:00 Workshop Dinner: Colony at The Ritz-Carlton

Colony at The Ritz-Carlton

jeu. 16 juillet

09:30 → 10:30 Environmental effects and matter systematics for low-frequency

Orateur: Enrico Barausse (IAP/CNRS)

10:30 → 11:00 Coffee Break

11:00 → 11:30 Rounding up the usual suspects: towards inference of beyond-vacuum effects in the LISA Global Fit

Orateur: Francisco Duque (Max Planck Institute for Gravitational Physics)

11:30 → 12:30 Discussion: Modelling and Measuring Beyond-Vacuum-GR Effects

Président de session: Andrea Maselli (Gran Sasso Science Institute)

12:30 → 14:00 Lunch

14:00 → 14:30 EMRIs in Light of QPEs: Recent Observational and Theoretical Advances

Orateur: Zhen Pan

14:30 → 14:45 "Gotta light?” Illuminating AGN Disks with LISA EMRIs

Orateur: Federico Fantoccoli

14:45 → 15:00 A consistency test for EMRIs

Orateur: Lorenzo Copparoni

15:00 → 15:30 Coffee Break

15:30 → 16:30 Discussion: Testing GR with EMRIs

Président de session: Nicolas Yunes

16:30 → 16:45 Probing vector hair of black holes with extreme-mass-ratio inspirals

Orateur: Lijing Shao

16:45 → 17:00 Modeling environmental effects with LISA

Orateur: Sajal Mukherjee

17:00 → 17:15 EMRI Environmentalism

Orateur: Leif Lui

ven. 17 juillet

10:00 → 10:30 Overview of LISA WG/DDPC activities

Orateurs: Leor Barack, Stanislav Babak (APC)

10:30 → 11:00 Coffee Break

11:00 → 11:30 TianQin update

Orateur: Jianwei Mei

11:30 → 12:30 Discussion: Multiband low-frequency GW astronomy and international collaboration

Présidents de session: He Wang, Dr Quentin Baghi (APC | Université Paris Cité)

12:30 → 14:00 Lunch

14:00 → 14:15 Forecasting EMRIs: Updated Rates and Bayesian Reality Checks

Orateur: Manuel Piarulli (L2I Toulouse, Université de Toulouse, CNRS/IN2P3)

14:15 → 14:30 Multi-source analysis of extreme mass ratio inspirals in the Mojito light common dataset

Orateur: Alessandro Santini (Max Planck Institute for Gravitational Physics (AEI))

14:30 → 14:45 Analysing With(out) LISA's noise asymmetries

Orateur: Karel Plets (KU Leuven)

14:45 → 15:45 Discussion: EMRIs in the global fit

Présidents de session: Diganta Bandopadhyay, Lorenzo Speri (European Space Agency)

15:45 → 15:55 Closing Remarks

Président de session: Alberto Vecchio