Dark Energy Survey Year 1 results: weak lensing shape catalogues

By Joe Zuntz, Erin Sheldon, S. Samuroff, M. Troxel, Michael J. Jarvis, N. MacCrann, Daniel Gruen, J. Prat, C. Sánchez, A. Choi and 97 more. Monthly notices of the Royal Astronomical Society, 2017

142 citations recorded by the source corpus.

We present two galaxy shape catalogues from the Dark Energy Survey Year 1 data set, covering 1500 deg2 with a median redshift of 0.59. The catalogues cover two main fields: Stripe 82, and an area overlapping the South Pole Telescope survey region. We describe our data analysis process and in particular our shape measurement using two independent shear measurement pipelines, METACALIBRATION and IM3SHAPE. The METACALIBRATION catalogue uses a Gaussian model with an innovative internal calibration scheme, and was applied to riz bands, yielding 34.8M objects. The IM3SHAPE catalogue uses amaximum-likelihood bulge/disc model calibrated using simulations, and was applied to r-band data, yielding 21.9M objects. Both catalogues pass a suite of null tests that demonstrate their fitness for use in weak lensing science. We estimate the 1σ uncertainties in multiplicative shear calibration to be 0.013 and 0.025 for the METACALIBRATION and IM3SHAPE catalogues, respectively.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/c5ce5e35753ad77e859c10862a6b8ac3a99a72aa

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Instrumentation

Citations in the corpus

Dark Energy Survey Year 1 results: weak lensing mass calibration of redMaPPer galaxy clusters (2018, methodology): “Blinding procedure As a precaution against unintentional confirmation bias in the scientific analyses, both weak lensing shape catalogues produced for DES Y1 had an unknown blinding factor in the magnitude of e (Zuntz et al. 2018) applied to them.”
The fourth data release of the Kilo-Degree Survey: ugri imaging and nine-band optical-IR photometry over 1000 square degrees (2019, methodology): “…the seeing distribution of the KiDSDR4 r-band data with those of the images used for the lensing measurements in the other major ongoing surveys: the DES-Year 1 riz data (Zuntz et al. 2018), which has a similar depth to KiDS, and the HSC DR1 i-band lensing catalogue (Mandelbaum et al. 2018).”
Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from two decades of spectroscopic surveys at the Apache Point Observatory (2020, background): “…and statistically sensitive estimates of weak lensing based on galaxy shapes, including CFHTLenS (Heymans et al. 2012), KiDS (Köhlinger et al. 2017), Dark Energy Survey (DES; Zuntz et al. 2018; Abbott et al. 2018), and Hyper Suprime-Cam survey (HSC; Mandelbaum et al. 2018; Hikage et al. 2019).”