NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Prototype Global Analysis of LISA Data with Multiple Source TypesThe novel data analysis challenges posed by the Laser Interferometer Space Antenna (LISA) arise from the overwhelmingly large number of astrophysical sources in the measurement band and the density with which they are found in the data. Robust detection and characterization of the numerous gravitational wave sources in LISA data can not be done sequentially, but rather through a simultaneous global fit of a data model containing the full suite of astrophysical and instrumental features present in the data. While previous analyses have focused on individual source types in isolation, here we present the first demonstration of a LISA global fit analysis containing combined astrophysical populations. The prototype pipeline uses a blocked Metropolis Hastings algorithm to alternatingly fit to a population of ultra compact galactic binaries, known “verification binaries” already identified by electromagnetic observations, a population of massive black hole mergers, and an instrument noise model. The Global LISA Analysis Software Suite (GLASS) is assembled from independently developed samplers for the different model components. The modular design enables flexibility to future development by defining standard interfaces for adding new, or updating additional, components to the global fit without being overly prescriptive for how those modules must be internally designed. The GLASS pipeline is demonstrated on data simulated for the LISA Data Challenge 2b. Results of the analysis and a road-map for continued development are described in detail.
Document ID
20230000445
Acquisition Source
Marshall Space Flight Center
Document Type
Accepted Manuscript (Version with final changes)
Authors
Tyson B. Littenberg
(Marshall Space Flight Center Redstone Arsenal, Alabama, United States)
Neil J. Cornish
(Montana State University Bozeman, Montana, United States)
Date Acquired
January 11, 2023
Publication Date
March 7, 2023
Publication Information
Publication: Physical Review D
Publisher: American Physical Society
Volume: 107
Issue: 6
Issue Publication Date: March 15, 2023
ISSN: 2470-0010
e-ISSN: 2470-0029
Subject Category
Astrophysics
Funding Number(s)
WBS: 244904.04.09.07.04.02
CONTRACT_GRANT: 80NSSC19K0320
Distribution Limits
Public
Copyright
Use by or on behalf of the US Gov. Permitted.
Keywords
Gravitational Waves
No Preview Available