1811.10596
Dark energy survey year 1: an independent E/B-mode cosmic shear analysis
Asgari, Heymans
Present an independent cosmic shear analysis of the non-cosmological B-mode distortions within the public first year data from DES. Find no significant detection of B-modes in a full tomographic analysis of the primary METACALIBRATION shear catalog. This is in contrast to the secondary IM3SHAPE shear catalogue, where B-modes are detected at a significance of ~3 sigma with a pattern that is consistent with the B-mode signature of a repeating additive shear bias across the survey. Use the COSEBIs statistic to cleanly separate the B-modes from the gravitational lensing signal (E-modes). Find good agreement between the measured E-modes and their theoretical expectation given the DES cosmological parameter constraints.
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