Cosmic shear in harmonic space from the Dark Energy Survey Year 1 Data: compatibility with configuration space results

(DES Collaboration), H. Camacho*, F. Andrade-Oliveira, A. Troja, R. Rosenfeld*, L. Faga, R. Gomes, C. Doux, X. Fang, M. Lima, V. Miranda, T. F. Eifler, O. Friedrich, M. Gatti, G. M. Bernstein, J. Blazek, S. L. Bridle, A. Choi, C. Davis, J. DeRoseE. Gaztanaga, D. Gruen, W. G. Hartley, B. Hoyle, M. Jarvis, N. MacCrann, J. Prat, M. M. Rau, S. Samuroff, C. Sánchez, E. Sheldon, M. A. Troxel, P. Vielzeuf, J. Zuntz, T. M. C. Abbott, M. Aguena, S. Allam, J. Annis, D. Bacon, E. Bertin, D. Brooks, D. L. Burke, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, F. J. Castander, R. Cawthon, M. Costanzi, L. N. da Costa, M. E. S. Pereira, J. De Vicente, S. Desai, H. T. Diehl, P. Doel, S. Everett, A. E. Evrard, I. Ferrero, B. Flaugher, P. Fosalba, D. Friedel, J. Frieman, J. García-Bellido, D. W. Gerdes, R. A. Gruendl, J. Gschwend, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, D. Huterer, D. J. James, K. Kuehn, N. Kuropatkin, O. Lahav, M. A. G. Maia, J. L. Marshall, P. Melchior, F. Menanteau, R. Miquel, R. Morgan, F. Paz-Chinchón, D. Petravick, A. Pieres, A. A. Plazas Malagón, K. Reil, M. Rodriguez-Monroy, E. Sanchez, V. Scarpine, M. Schubnell, S. Serrano, I. Sevilla-Noarbe, M. Smith, M. Soares-Santos, E. Suchyta, G. Tarle, D. Thomas, C. To, T. N. Varga, J. Weller, R. D. Wilkinson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

We perform a cosmic shear analysis in harmonic space using the first year of data collected by the Dark Energy Survey (DES-Y1). We measure the cosmic weak lensing shear power spectra using the metacalibration catalogue and perform a likelihood analysis within the framework of CosmoSIS. We set scale cuts based on baryonic effects contamination and model redshift and shear calibration uncertainties as well as intrinsic alignments. We adopt as fiducial covariance matrix an analytical computation accounting for the mask geometry in the Gaussian term, including non-Gaussian contributions. A suite of 1200 lognormal simulations is used to validate the harmonic space pipeline and the covariance matrix. We perform a series of stress tests to gauge the robustness of the harmonic space analysis. Finally, we use the DES-Y1 pipeline in configuration space to perform a similar likelihood analysis and compare both results, demonstrating their compatibility in estimating the cosmological parameters S8, σ8, and Ωm. We use the DES-Y1 metacalibration shape catalogue, with photometric redshifts estimates in the range of 0.2−1.3, divided in four tomographic bins finding σ8(Ωm/0.3)0.5 = 0.766 ± 0.033 at 68 per cent CL. The methods implemented and validated in this paper will allow us to perform a consistent harmonic space analysis in the upcoming DES data.
Original languageEnglish
Pages (from-to)5799-5815
Number of pages17
JournalMonthly Notices of the Royal Astronomical Society
Volume516
Issue number4
Early online date11 Sept 2022
DOIs
Publication statusPublished - 1 Nov 2022

Keywords / Materials (for Non-textual outputs)

  • astro-ph.CO

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