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Martin Boutelier (CNES)04/05/2026 14:00
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Dr Oliver Jennrich (ESA)04/05/2026 14:20
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Jean-Charles Damery (CNES)04/05/2026 14:35
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Anne-Therese Nguyen, Antoine Petiteau (CEA/IRFU/DPhP)04/05/2026 15:05
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Astrid Lamberts (Observatoire de la Côte d'Azur)04/05/2026 15:25
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Marta Volonteri04/05/2026 15:40
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Fabian Schussler (CEA/Irfu)04/05/2026 16:25
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Emeric Seraille (LPENS)04/05/2026 16:45
Compact binaries are the primary sources of gravitational waves measured by gravitational-wave detectors. In this context, obtaining the equations of motion in different approximation schemes is essential for producing waveform templates with the accuracy required by future LISA detections.
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In this presentation, I derive the gravitational radiation-reaction force on a compact binary system... -
M. Solano Felicio (Observatoire de la Côte d'Azur)04/05/2026 17:05
LISA is a space mission to observe millihertz gravitational waves (GWs), planned for 2035. Millions of white dwarf binaries in the Milky Way (MW) will contribute to LISA data, of which a few thousand are expected to be individually resolved. The unresolved signal, dubbed the Galactic foreground, can be astrophysically interpreted through careful analysis. We assess LISA's capability to...
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Dr Adrian MACQUET (IRAP)04/05/2026 17:25
The LISA External Data work package is coordinated by IRAP and L2IT in the framework of the DDPC. Its primary objective is to collect all data from sources outside LISA that may be relevant to the mission, and to provide the software infrastructure necessary for their distribution in a standardized way that is compatible with the software requirements of the DDPC.
A first prototype is...
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Dr Nicolas Dagoneau (CEA Paris-Saclay)04/05/2026 17:45
In this talk, we will provide an update on the contributions of CEA to DDPC and P&O.
Within DDPC, CEA is involved in CU L01 and CU L2A. We will present the latest updates on our work on the common dataset, as well as on source detection and parameter estimation in the context of the Low Latency Alert Pipeline (LLAP).
As the lead of CU L01 and technical deputy of CU L2A, we will also...
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Hugo Alexandre (LPC Caen)04/05/2026 18:05
The LISA constellation offers a unique opportunity to detect EMRIs, with a sensitivity band that is particularly well suited to these sources. Their detection will not only allow us to probe the intrinsic properties and immediate environments of black holes in the local Universe, but also to use these sources as “dark sirens” for cosmological studies \cite{colpi2024lisa}.
To fully exploit...
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Sylvain Marsat (L2I Toulouse, CNRS/IN2P3, Université de Toulouse)05/05/2026 09:00
Massive black hole binaries (MBHBs) are one of the main targets of the LISA mission, with numerous science objectives ranging from astrophysics to comsology. These signals will reach very high signal-to-noise ratios (SNRs), from hundreds up to thousands, opening the possibility of high-precision scientific measurements, such as the search for deviations from General Relativity. However, in...
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Jean-Baptiste Bayle (CEA)05/05/2026 09:20
The LISA L01 pipeline plays a central role in transforming raw measurements into calibrated, science-ready Time-Delay Interferometry (TDI) observables. This stage encompasses data preprocessing for calibration, noise mitigation, and clock synchronization—key steps required before higher-level scientific analysis and global fitting.
In this talk, I will present recent updates of the L01...
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Coen Rondeel (Observatoire de la Côte d'Azur)05/05/2026 09:40
LISA is expected to observe tens of thousands of resolved Galactic Binaries (GBs), requiring data analysis pipelines to handle physically motivated populations and perform rigorous astrophysical inference. To prepare for future data streams, global fit pipelines must be tested against realistic scenarios. The most recent LISA Data Challenge, "Mojito," provides the ideal testbed, introducing...
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Adrien Cogez (CEA/IRFU/DPhP)05/05/2026 10:00
The gravitational memory effect is an unobserved prediction of General Relativity. In our work, we investigate the prospects for detecting this memory effect with LISA from a massive black hole binary merger. Using a Bayesian analysis, we assess the conditions under which the memory signal can be confidently identified in LISA data. Our results highlight a region of the source parameter space...
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Alice Perego (Observatoire de la Côte d'Azur)05/05/2026 10:20
Very short period double white dwarfs (DWDs) in our Milky Way (MW) will be one of the most numerous classes of sources detectable by the upcoming Laser Interferometer Space Antenna (LISA), with its scientific return strongly enhanced by the availability of electromagnetic (EM) counterparts. This makes the present an ideal opportunity to chart the population of (potential) LISA sources across...
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Antsa Rasamoela (L2I Toulouse, CNRS/IN2P3, Université de Toulouse)05/05/2026 10:40
The immense scientific potential of LISA hinges on solving an unprecedented data analysis challenge: the Global Fit problem. This involves the simultaneous inference of numerous overlapping signals and instrument noise, framed in a high-dimensional Bayesian setting.
Current approaches rely on computationally intensive Markov chain Monte Carlo (MCMC) techniques with block Gibbs sampling...
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Dr Shivani Harer05/05/2026 11:30
The LISA constellation employs three spacecrafts that exchange laser beams to make interferometric measurements over a distance of 2.5 million kms. The measurements will then telemetered down to Earth at a lower sampling frequency. Anti-aliasing filters will be used on board to limit spectral folding of out-of-band laser noise. The primary noise concern in these measurements is laser frequency...
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Louis Le Saulnier (CEA)05/05/2026 14:00
Dans le cadre de l’analyse de données de LISA et du développement du pipeline d’alertes rapides (LLAP) qui impose de fortes contraintes de temps, où la détection et la caractérisation rapide des binaires de trous noirs supermassifs (MBHB) constituent un enjeu central, je présenterai mes travaux sur l’estimation de leurs paramètres.
Je montrerai ainsi une approche basée sur une simulation de...
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Malvina Bellotti (Observatoire de la Côte d'Azur, Nice)05/05/2026 14:20
A primary target for LISA will be massive black hole binaries (MBHBs), the inspiral of which will be detectable in a few days to months before coalescence. If they occur in gas-rich environments, they may produce electromagnetic (EM) counterparts, allowing for multimessenger follow-up.
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To provide triggers to the EM community rapid parameter estimation is needed, specifically of merger time,... -
Gaël Servignat (LUTH)05/05/2026 14:40
Among the numerous sources expected to be observed by LISA, stellar-mass black holes and EMRIs constitute two of the main classes with specific science objectives. The former, already observed by LVK detectors, would be now discovered in their early inspiral phase where, for example, eccentricity information would give us information on the environment in which they form and would give a probe...
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joseph Martino (APC)05/05/2026 15:00
Dans le cadre du groupe Performance & Operations, je présenterai une analyse des impacts des simplifications et corrélations au niveau constellation. Deux questions ont guidé ce travail : ces simplifications remettent-elles en cause le budget de bruit, et permettent-elles de conduire une campagne de vérification ? Les résultats montrent que si le budget de bruit reste valide, la vérification...
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Maxime VINCENT (AstroParticule et Cosmologie)05/05/2026 15:20
The French contribution to the LISA Consortium, on the instrumental side, focuses on developing optical ground support equipment to validate LISA's performance prior to launch. One key task of the French community is to test and validate the performance of the Interferometric Detection System (IDS).
To this end, the IDS Test Set-Up is currently under development. Its objectives are twofold:...
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Lucas Pardessus (APC)05/05/2026 15:40
The presentation will review the technologies that have been developed during the last year for testing the performances of the metrological instrumentation core of LISA with the Beam Simulator, a test contraption. An introductory part will give a general description of the Beam Simulator, explaining the need at the origin of its development, the test Interferometric Detection System (IDS)...
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M. Jean-Charles Damery (CNES)05/05/2026 16:00
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