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LISA GW Space Observatory<a href="https://astrodon.social/tags/LISACommunityTalks" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#LISACommunityTalks</a> The <a href="https://astrodon.social/tags/LISACommunity" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#LISACommunity</a> recently hosted a talk by Jan Niklas Reinhardt on a paper by Jan Niklas Reinhardt, Olaf Hartwig, Gerhard Heinzel: "Clock synchronization and light-travel-time estimation for space-based gravitational-wave detectors", linked here 👉 <a href="https://arxiv.org/abs/2408.09832" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://arxiv.org/abs/2408.09832</a> and <a href="https://iopscience.iop.org/article/10.1088/1361-6382/ada2d3" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://iopscience.iop.org/article/10.1088/1361-6382/ada2d3</a>Here's a summary of the paper:"Space-based gravitational-wave detectors, such as LISA, record interferometric measurements on widely separated satellites. Their clocks are not actively synchronized. Instead, clock synchronization is performed in on-ground data processing using pseudorange measurements, which entangle the interspacecraft ranges with the relative clock desynchronizations. To achieve clock synchronization between the spacecraft, we need to isolate these clock desynchronizations by disentangling the pseudoranges. We introduce a nonstandard Kalman filter algorithm for this purpose, designed for systems where pseudorange measurements are taken in different time frames. This algorithm enables clock synchronization and light travel time estimation with sub-meter accuracy."

LISA GW Space Observatory<a href="https://astrodon.social/tags/LISACommunityTalks" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#LISACommunityTalks</a> The <a href="https://astrodon.social/tags/LISACommunity" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#LISACommunity</a> recently hosted a talk by Valerio De Luca on a paper by Valerio De Luca, Justin Khoury, Sam S. C. Wong: "Gravitational memory and soft theorems: the local perspective", linked here 👉 <a href="https://arxiv.org/abs/2412.01910" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://arxiv.org/abs/2412.01910</a> and <a href="https://arxiv.org/abs/2412.12273" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://arxiv.org/abs/2412.12273</a> (accepted in PRD at <a href="https://journals.aps.org/prd/accepted/76071Qd0M2118331f5b87943d34c36b167b45d9d9" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://journals.aps.org/prd/accepted/76071Qd0M2118331f5b87943d34c36b167b45d9d9</a>)Here's a summary of the paper:"Gravitational memory describes the lasting effect on freely falling detectors after a gravitational wave passes by, and it has been intimately connected to asymptotic symmetries and soft theorems. In this talk, we will explore a new symmetry perspective of gravitational memory in synchronous coordinates, which are relevant for detectors like LISA. We will show how memory ties to residual coordinate transformations, such as volume-preserving spatial rescalings, and we will derive the corresponding soft theorems for both scattering amplitudes and correlation functions. The latter are recognized as the flat-space analog of soft theorems in inflationary cosmology."

LISA GW Space Observatory<a href="https://astrodon.social/tags/LISACommunityTalks" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#LISACommunityTalks</a> The <a href="https://astrodon.social/tags/LISACommunity" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#LISACommunity</a> recently hosted a talk by Senwen Deng on a paper by Senwen Deng, Stanislav Babak, Maude Le Jeune, Sylvain Marsat, Éric Plagnol, Andrea Sartirana: "Modular global-fit pipeline for LISA data analysis", linked here 👉 <a href="https://arxiv.org/abs/2501.10277" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://arxiv.org/abs/2501.10277</a>Here's a summary of the paper:"The <a href="https://astrodon.social/tags/LISAMission" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#LISAMission</a> data band is expected to be dominated by gravitational wave signals emitted by a plethora of astrophysical sources. Signals of the Galactic white dwarf Binaries are long-lived, overlapping in time and their unresolved residual forms a confusion noise. Massive Black Hole Binary signals are loud and broadband, hindering the estimation of the noise property, the knowledge of which is key to the detection and parameter estimation for the gravitational wave signals. We came up with a modular two-stage iterative pipeline prototype to disentangle the intertwined signals and to infer the parameters for the different signal sources and the noise level. We demonstrated its capability by applying it to simulated LISA dataset known as "Sangria", where we managed to recover the injected parameters at the simulation with faithfulness."

LISA GW Space ObservatoryToday we celebrate International Women's Day! [Posted by LISA DEI Committee] <a href="https://astrodon.social/tags/InternationalWomensDay" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#InternationalWomensDay</a> <a href="https://astrodon.social/tags/LISACommunity" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#LISACommunity</a> <a href="https://astrodon.social/tags/8thMarch" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#8thMarch</a>

LISA GW Space ObservatoryJust a year ago LISA passed a major review with flying colours: The whole concept - from the definition of the overall mission and operations to the space hardware to be built - stood up to the intense scrutiny of ESA´s reviewers. ESA confirmed that LISA is sufficiently mature and mission development could proceed as planned. The sky's (not) the limit🚀 <a href="https://astrodon.social/tags/lisamission" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#lisamission</a> <a href="https://astrodon.social/tags/LISACommunity" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#LISACommunity</a> <a href="https://astrodon.social/tags/gwspace" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#gwspace</a> <a href="https://astrodon.social/tags/europeanspaceagency" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#europeanspaceagency</a> <a href="https://astrodon.social/tags/nasa" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#nasa</a>

LISA GW Space ObservatoryDear friends and supporters of LISA around the world, many of our colleagues in the Gravitational Wave community have been affected by the wildfires in the Los Angeles area. Hundreds have lost their homes to the fires, and thousands have been displaced by the evacuations. If you want to help, please check out the JPL-Caltech relief fund and consider donating: <a href="https://giving.caltech.edu/areas-to-support/relief" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://giving.caltech.edu/areas-to-support/relief</a> <a href="https://astrodon.social/tags/gwcommunity" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#gwcommunity</a> <a href="https://astrodon.social/tags/LISACommunity" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#LISACommunity</a>

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