Speaker
Description
The LISA Distributed Data Processing Center (DDPC) has kicked off in June 2024, aiming at designing and implementing the data processing and data analysis software and infrastructure to interpret LISA measurement data-streams. An important component of DDPC is the simulation of a representative, synthetics dataset feeding all the building blocks of data processing and analysis to design, optimize and challenge the different pipelines.
The first Common Dataset CD1, code-name «Mojito», will be produced by the end of 2025. It will eventually contain a rich cocktail of population-based MBHB mergers, EMRIs, galactic and extra-galactic white dwarves binaries, as well as a handful of stellar mass black bole binaries and their associated confusion background. On the instrument side, two different levels of noise complexity are foreseen, adjusting noise models and properties, or adding glitches and gaps. The main elements of the common dataset will be publicly released eventually.
On the cosmology side, 3 background signals are currently being proposed, all specified as phenomenological models (1. Flat, scale-free signal, 2. single broken power law, 3. double peaked spectrum), but mapped to theoretical templates of specific mechanisms (e.g. phase transitions, SIGWB and PBHs) to enable both agnostic or template searches. All backgrounds will be made isotropic in the CMB frame. By the time of the workshop, this selection should be reviewed, revised, and validated by DDPC and the LISA Science Team.
In this talk, I will summarize the final selection and properties picked for these three signals, the physical and data analysis motivations behind.
