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  Blinding multiprobe cosmological experiments

Muir, J., Bernstein, G. M., Huterer, D., Elsner, F., Krause, E., Roodman, A., et al. (2020). Blinding multiprobe cosmological experiments. Monthly Notices of the Royal Astronomical Society, 494(3), 4454–4470-4470. doi:10.1093/mnras/staa965.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-B5B6-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-B5B7-F
Genre: Journal Article

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Muir, J., Author
Bernstein, G. M., Author
Huterer, D., Author
Elsner, F., Author
Krause, E., Author
Roodman, A., Author
Allam, S., Author
Annis, J., Author
Avila, S., Author
Bechtol, K., Author
Bertin, E., Author
Brooks, D., Author
Buckley-Geer, E., Author
Burke, D. L., Author
Rosell, A. Carnero, Author
Kind, M. Carrasco, Author
Carretero, J., Author
Cawthon, R., Author
Costanzi, M., Author
da Costa, L. N., Author
Vicente, J. De, AuthorDesai, S., AuthorDietrich, J. P., AuthorDoel, P., AuthorEifler, T. F., AuthorEverett, S., AuthorFosalba, P., AuthorFrieman, J., AuthorGarcía-Bellido, J., AuthorGerdes, D. W., AuthorGruen, D., AuthorGruendl, R. A., AuthorGschwend, J., AuthorHartley, W. G., AuthorHollowood, D. L., AuthorJames, D. J., AuthorJarvis, M., AuthorKuehn, K., AuthorKuropatkin, N., AuthorLahav, O., AuthorMarch, M., AuthorMarshall, J. L., AuthorMelchior, P., AuthorMenanteau, F., AuthorMiquel, R., AuthorOgando, R. L. C., AuthorPalmese, A., AuthorPaz-Chinchón, F., AuthorPlazas, A. A., AuthorRomer, A. K., AuthorSanchez, E., AuthorScarpine, V., AuthorSchubnell, M., AuthorSerrano, S., AuthorSevilla-Noarbe, I., AuthorSmith, M., AuthorSuchyta, E., AuthorTarle, G., AuthorThomas, D., AuthorTroxel, M. A., AuthorWalker, A. R., AuthorWeller, J.1, Author              Wester, W., AuthorZuntz, J., Author more..
Affiliations:
1Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159895              

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 Abstract: The goal of blinding is to hide an experiment’s critical results – here the inferred cosmological parameters – until all decisions affecting its analysis have been finalized. This is especially important in the current era of precision cosmology, when the results of any new experiment are closely scrutinized for consistency or tension with previous results. In analyses that combine multiple observational probes, like the combination of galaxy clustering and weak lensing in the Dark Energy Survey (DES), it is challenging to blind the results while retaining the ability to check for (in)consistency between different parts of the data. We propose a simple new blinding transformation, which works by modifying the summary statistics that are input to parameter estimation, such as two-point correlation functions. The transformation shifts the measured statistics to new values that are consistent with (blindly) shifted cosmological parameters while preserving internal (in)consistency. We apply the blinding transformation to simulated data for the projected DES Year 3 galaxy clustering and weak lensing analysis, demonstrating that practical blinding is achieved without significant perturbation of internal-consistency checks, as measured here by degradation of the χ2 between the data and best-fitting model. Our blinding method’s performance is expected to improve as experiments evolve to higher precision and accuracy.

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 Dates: 2020-04-15
 Publication Status: Published online
 Pages: -
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 Rev. Method: Peer
 Identifiers: DOI: 10.1093/mnras/staa965
 Degree: -

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Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
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Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 494 (3) Sequence Number: - Start / End Page: 4454–4470 - 4470 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150