First release of LiteBIRD simulations from an end-to-end pipeline

Journal article

The LiteBIRD satellite mission aims at detecting Cosmic Microwave Background B modes with unprecedented precision, targeting a total error on the tensor-to-scalar ratio r of δr ∼ 0.001. Operating from the L2 Lagrangian point of the Sun-Earth system, LiteBIRD will survey the full sky across 15 frequency bands (34 to 448 GHz) for 3 years.The current LiteBIRD baseline configuration employs 4508 detectors sampling at 19.1 Hz to achieve an effective polarization sensitivity of 2 μK arcmin and an angular resolution of 31 arcmin (at 140 GHz). We describe the first release of the official LiteBIRD simulations, realized with a new simulation pipeline developed using the LiteBIRD Simulation Framework. This pipeline generates 500 full-sky simulated maps at a HEALPix resolution of N side=512. The simulations include also one year of Time Ordered Data (TOD) for approximately one-third of LiteBIRD's total detectors.

Authors: Bortolami, M; Raffuzzi, N; Pagano, L; Puglisi, G; Anand, A

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: IOP Publishing
• Journal: Journal of Cosmology and Astroparticle Physics
• Volume: 2025
• Issue: 11
• Article number: 042
• Publication date: 2025-11-13
• Acceptance date: 2025-08-19
• DOI: 10.1088/1475-7516/2025/11/042
• EISSN: 1475-7516
• ISSN: 1475-7516
• Language: English
• Keywords: gravitational waves and CMBR polarization; CMBR experiments; CMBR polarisation