Fredagskollokvium: On simulations, reproducibility and Open Science in BeyondPlanck and Cosmoglobe

Maksym Brilenkov, PhD student at Institute of Theoretical Astrophysics, University of Oslo.

portrettbildet av en ung smilende mann
Maksym Brilenkov, PhD student in Cosmology and Extragalactic Astronomy, ITA. Photo credits: ITA/UiO.

The BeyondPlanck collaboration has implemented the first integrated Bayesian end-to-end analysis pipeline for CMB experiments with its primary focus being on processing the LFI data. The Cosmoglobe project is a natural generalization of BeyondPlanck whose long-term goal is to include all the available datasets to completely cover the entire sky in radio, microwave, and sub-millimeter experiments. Such ambitious goal requires broad participation from the CMB community; thus, making the idea of Open Science and reproducibility the two foundational aspects of this program.

Therefore, in my talk, I am going to discuss our efforts towards this aim. In particular, what we did in order to facilitate the easy code and data distribution, code-documentation, compilation procedures etc. In addition, I am going to describe our efforts on code and algorithm validation, for which we have generated the a set of 1 year LFI 30 GHz simulated data with known inputs. Finally, I will discuss the difference between frequentist and Bayesian simulations and their different applications in model testing and parameter estimation.

diagram of the flow chart of the project
Schematic overview of the BeyondPlanck processing pipeline along with the required input files. Credits: Maksym Brilenkov for the "Beyond Planck collaboration".

This Friday colloquium will be hybrid. Attendees can therefore participate either in-person or via Zoom. Please join via Zoom at

https://uio.zoom.us/j/69001043754?pwd=cEJpbVE5ci9PdWNtRld2TDNNcGtKdz09

Meeting ID: 690 0104 3754

Passcode: PeiseStua3

Attendees will be muted during the colloquium, but will have the opportunity to ask questions at the end by clicking on the "raise hand” button (or send a request via chat).

Emneord: fredagskollokvium, institute seminar, Kosmologi, Cosmology, Cosmic Microwave Background (CMB), Planck
Publisert 14. nov. 2022 10:02 - Sist endret 14. nov. 2022 10:02