BEYONDPLANCK: III. Commander3

We describe the computational infrastructure for end-to-end Bayesian cosmic microwave background (CMB) analysis implemented by the BeyondPlanck Collaboration. The code is called Commander3 . It provides a statistically consistent framework for global analysis of CMB and microwave observations and ma...

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Veröffentlicht in:Astronomy and astrophysics (Berlin) 2023-06, Vol.675, p.A3
Hauptverfasser: Galloway, M., Andersen, K. J., Aurlien, R., Banerji, R., Bersanelli, M., Bertocco, S., Brilenkov, M., Carbone, M., Colombo, L. P. L., Eriksen, H. K., Eskilt, J. R., Foss, M. K., Franceschet, C., Fuskeland, U., Galeotta, S., Gerakakis, S., Gjerløw, E., Hensley, B., Herman, D., Iacobellis, M., Ieronymaki, M., Ihle, H. T., Jewell, J. B., Karakci, A., Keihänen, E., Keskitalo, R., Maggio, G., Maino, D., Maris, M., Mennella, A., Paradiso, S., Partridge, B., Reinecke, M., San, M., Suur-Uski, A.-S., Svalheim, T. L., Tavagnacco, D., Thommesen, H., Watts, D. J., Wehus, I. K., Zacchei, A.
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container_issue
container_start_page A3
container_title Astronomy and astrophysics (Berlin)
container_volume 675
creator Galloway, M.
Andersen, K. J.
Aurlien, R.
Banerji, R.
Bersanelli, M.
Bertocco, S.
Brilenkov, M.
Carbone, M.
Colombo, L. P. L.
Eriksen, H. K.
Eskilt, J. R.
Foss, M. K.
Franceschet, C.
Fuskeland, U.
Galeotta, S.
Gerakakis, S.
Gjerløw, E.
Hensley, B.
Herman, D.
Iacobellis, M.
Ieronymaki, M.
Ihle, H. T.
Jewell, J. B.
Karakci, A.
Keihänen, E.
Keskitalo, R.
Maggio, G.
Maino, D.
Maris, M.
Mennella, A.
Paradiso, S.
Partridge, B.
Reinecke, M.
San, M.
Suur-Uski, A.-S.
Svalheim, T. L.
Tavagnacco, D.
Thommesen, H.
Watts, D. J.
Wehus, I. K.
Zacchei, A.
description We describe the computational infrastructure for end-to-end Bayesian cosmic microwave background (CMB) analysis implemented by the BeyondPlanck Collaboration. The code is called Commander3 . It provides a statistically consistent framework for global analysis of CMB and microwave observations and may be useful for a wide range of legacy, current, and future experiments. The paper has three main goals. Firstly, we provide a high-level overview of the existing code base, aiming to guide readers who wish to extend and adapt the code according to their own needs or re-implement it from scratch in a different programming language. Secondly, we discuss some critical computational challenges that arise within any global CMB analysis framework, for instance in-memory compression of time-ordered data, fast Fourier transform optimization, and parallelization and load-balancing. Thirdly, we quantify the CPU and RAM requirements for the current B EYOND P LANCK analysis, finding that a total of 1.5 TB of RAM is required for efficient analysis and that the total cost of a full Gibbs sample for LFI is 170 CPU-hrs, including both low-level processing and high-level component separation, which is well within the capabilities of current low-cost computing facilities. The existing code base is made publicly available under a GNU General Public Library (GPL) license.
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subjects ASTRONOMY AND ASTROPHYSICS
cosmic background radiation
MATHEMATICS AND COMPUTING
methods: data analysis
methods: numerical
title BEYONDPLANCK: III. Commander3
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