Journal article
The Simons Observatory: impact of bandpass, polarization angle and calibration uncertainties on small-scale power spectrum analysis
S Giardiello, M Gerbino, L Pagano, D Alonso, B Beringue, B Bolliet, E Calabrese, G Coppi, J Errard, G Fabbian, I Harrison, JC Hill, HT Jense, B Keating, A La Posta, M Lattanzi, AI Lonappan, G Puglisi, CL Reichardt, SM Simon
Journal of Cosmology and Astroparticle Physics | IOP Publishing | Published : 2024
Abstract
We study the effects due to mismatches in passbands, polarization angles, and temperature and polarization calibrations in the context of the upcoming cosmic microwave background experiment Simons Observatory (SO). Using the SO multi-frequency likelihood, we estimate the bias and the degradation of constraining power in cosmological and astrophysical foreground parameters assuming different levels of knowledge of the instrumental effects. We find that incorrect but reasonable assumptions about the values of all the systematics examined here can have significant effects on cosmological analyses, hence requiring marginalization approaches at the likelihood level. When doing so, we find that th..
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Awarded by Science and Technology Facilities Council
Funding Acknowledgements
We thank Xavier Garrido and Thibaut Louis for several useful discussions and invaluable help during the analysis. We acknowledge the use of numpy [57] , matplotlib [58] and getdist [59] software packages. We acknowledge the CINECA award under the ISCRA initiative, for the availability of high performance computing resources and the Hawk high-performance computing cluster at the Advanced Research Computing at Cardiff (ARCCA) . SG, HTJ, IH, BBe and EC acknowledge support from the Horizon 2020 ERC Starting Grant (Grant agreement No 849169) ; SG and EC also acknowledge support from STFC and UKRI (grant numbers ST/W002892/1 and ST/X006360/1) ; MG is funded by the European Union (ERC, RELiCS, project number 101116027) . Views and opinions expressed are however those of the author (s) only and do not necessarily reflect those of the European Union or the European Research Council Executive Agency. Neither the European Union nor the granting authority can be held responsible for them. MG and GP acknowledge support from the PRIN (Progetti di ricerca di Rilevante Interesse Nazionale) number 2022WJ9J33. MG, LP, ML and GP acknowledge the financial support from the COSMOS network ( www.cosmosnet.it) through the ASI (Italian Space Agency) Grants 2016-24-H.0 and 2016-24-H.1-2018. DA acknowledges support from the Beecroft Trust. GF acknowledges the support of the European Research Council under the Marie Sklodowska Curie actions through the Individual Global Fellowship No. 892401 PiCOGAMBAS. CLR acknowledges support from the Australian Research Council's Discovery Projects scheme (DP200101068) . BBo acknowledges support from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (Grant agreement No. 851274) . This manuscript has been authored by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics. This work was supported in part by a grant from the Simons Foundation (Award No 457687, B.K.) .r with the U.S. Department of Energy, Office of Science, Office of High Energy Physics. This work was supported in part by a grant from the Simons Foundation (Award No 457687, B.K.) .