A Simulation Framework for the LiteBIRD Instruments
Abstract
LiteBIRD, the Lite (Light) satellite for the study of -mode polarization and Inflation from cosmic background Radiation Detection, is a space mission focused on primordial cosmology and fundamental physics. In this paper, we present the LiteBIRD Simulation Framework (LBS), a Python package designed for the implementation of pipelines that model the outputs of the data acquisition process from the three instruments on the LiteBIRD spacecraft: LFT (Low-Frequency Telescope), MFT (Mid-Frequency Telescope), and HFT (High-Frequency Telescope). LBS provides several modules to simulate the scanning strategy of the telescopes, the measurement of realistic polarized radiation coming from the sky (including the Cosmic Microwave Background itself, the Solar and Kinematic dipole, and the diffuse foregrounds emitted by the Galaxy), the generation of instrumental noise and the effect of systematic errors, like pointing wobbling, non-idealities in the Half-Wave Plate, et cetera. Additionally, we present the implementation of a simple but complete pipeline that showcases the main features of LBS. We also discuss how we ensured that LBS lets people develop pipelines whose results are accurate and reproducible. A full end-to-end pipeline has been developed using LBS to characterize the scientific performance of the LiteBIRD experiment. This pipeline and the results of the first simulation run are presented in Puglisi et al. (2025).
Keywords
Cite
@article{arxiv.2507.04918,
title = {A Simulation Framework for the LiteBIRD Instruments},
author = {M. Tomasi and L. Pagano and A. Anand and C. Baccigalupi and A. J. Banday and M. Bortolami and G. Galloni and M. Galloway and T. Ghigna and S. Giardiello and M. Gomes and E. Hivon and N. Krachmalnicoff and S. Micheli and M. Monelli and Y. Nagano and A. Novelli and G. Patanchon and D. Poletti and G. Puglisi and N. Raffuzzi and M. Reinecke and Y. Takase and G. Weymann-Despres and D. Adak and E. Allys and J. Aumont and R. Aurvik and M. Ballardini and R. B. Barreiro and N. Bartolo and S. Basak and M. Bersanelli and A. Besnard and T. Brinckmann and E. Calabrese and P. Campeti and E. Carinos and A. Carones and F. J. Casas and K. Cheung and M. Citran and L. Clermont and F. Columbro and G. Coppi and A. Coppolecchia and F. Cuttaia and P. Dal Bo and P. de Bernardis and E. de la Hoz and M. De Lucia and S. Della Torre and P. Diego-Palazuelos and H. K. Eriksen and T. Essinger-Hileman and C. Franceschet and U. Fuskeland and M. Gerbino and M. Gervasi and C. Gimeno-Amo and E. Gjerløw and A. Gruppuso and M. Hazumi and S. Henrot-Versillé and L. T. Hergt and B. Jost and K. Kohri and L. Lamagna and T. Lari and M. Lattanzi and C. Leloup and F. Levrier and A. I. Lonappan and M. López-Caniego and G. Luzzi and J. Macias-Perez and B. Maffei and E. Martínez-González and S. Masi and S. Matarrese and T. Matsumura and L. Montier and G. Morgante and L. Mousset and R. Nagata and F. Noviello and I. Obata and A. Occhiuzzi and A. Paiella and D. Paoletti and G. Pascual-Cisneros and F. Piacentini and M. Pinchera and G. Polenta and L. Porcelli and M. Remazeilles and A. Ritacco and A. Rizzieri and J. A. Rubiño-Martín and M. Ruiz-Granda and J. Sanghavi and V. Sauvage and M. Shiraishi and G. Signorelli and S. L. Stever and R. M. Sullivan and K. Tassis and L. Terenzi and L. Vacher and B. van Tent and P. Vielva and I. K. Wehus and M. Zannoni and Y. Zhou},
journal= {arXiv preprint arXiv:2507.04918},
year = {2025}
}
Comments
35 pages, 1 figure, to be submitted to JCAP