eprintid: 10098304
rev_number: 18
eprint_status: archive
userid: 608
dir: disk0/10/09/83/04
datestamp: 2020-05-27 14:25:51
lastmod: 2021-10-30 22:30:45
status_changed: 2020-05-27 14:25:51
type: article
metadata_visibility: show
creators_name: Kacprzak, T
creators_name: Herbel, J
creators_name: Nicola, A
creators_name: Sgier, R
creators_name: Tarsitano, F
creators_name: Bruderer, C
creators_name: Amara, A
creators_name: Refregier, A
creators_name: Bridle, SL
creators_name: Drlica-Wagner, A
creators_name: Gruen, D
creators_name: Hartley, WG
creators_name: Hoyle, B
creators_name: Secco, LF
creators_name: Zuntz, J
creators_name: Annis, J
creators_name: Avila, S
creators_name: Bertin, E
creators_name: Brooks, D
creators_name: Buckley-Geer, E
creators_name: Carnero Rosell, A
creators_name: Kind, MC
creators_name: Carretero, J
creators_name: Da Costa, LN
creators_name: De Vicente, J
creators_name: Desai, S
creators_name: Diehl, HT
creators_name: Doel, P
creators_name: Garcia-Bellido, J
creators_name: Gaztanaga, E
creators_name: Gruendl, RA
creators_name: Gschwend, J
creators_name: Gutierrez, G
creators_name: Hollowood, DL
creators_name: Honscheid, K
creators_name: James, DJ
creators_name: Jarvis, M
creators_name: Lima, M
creators_name: Maia, MAG
creators_name: Marshall, JL
creators_name: Melchior, P
creators_name: Menanteau, F
creators_name: Miquel, R
creators_name: Paz-Chinchon, F
creators_name: Plazas, AA
creators_name: Sanchez, E
creators_name: Scarpine, V
creators_name: Serrano, S
creators_name: Sevilla-Noarbe, I
creators_name: Smith, M
creators_name: Suchyta, E
creators_name: Swanson, MEC
creators_name: Tarle, G
creators_name: Vikram, V
creators_name: Weller, J
title: Monte Carlo control loops for cosmic shear cosmology with DES Year 1 data
ispublished: pub
divisions: UCL
divisions: B02
divisions: C07
divisions: D07
divisions: F86
divisions: B04
divisions: C06
divisions: F60
note: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: Weak lensing by large-scale structure is a powerful probe of cosmology and of the dark universe. This cosmic shear technique relies on the accurate measurement of the shapes and redshifts of background galaxies and requires precise control of systematic errors. Monte Carlo control loops (MCCL) is a forward modeling method designed to tackle this problem. It relies on the ultra fast image generator (UFig) to produce simulated images tuned to match the target data statistically, followed by calibrations and tolerance loops. We present the first end-to-end application of this method, on the Dark Energy Survey (DES) Year 1 wide field imaging data. We simultaneously measure the shear power spectrum 
C
ℓ
 and the redshift distribution 
n
(
z
)
 of the background galaxy sample. The method includes maps of the systematic sources, point spread function (PSF), an approximate Bayesian computation (ABC) inference of the simulation model parameters, a shear calibration scheme, and a fast method to estimate the covariance matrix. We find a close statistical agreement between the simulations and the DES Y1 data using an array of diagnostics. In a nontomographic setting, we derive a set of 
C
ℓ
 and 
n
(
z
)
 curves that encode the cosmic shear measurement, as well as the systematic uncertainty. Following a blinding scheme, we measure the combination of 
Ω
m
, 
σ
8
, and intrinsic alignment amplitude 
A
IA
, defined as 
S
8
D
IA
=
σ
8
(
Ω
m
/
0.3
)
0.5
D
IA
, where 
D
IA
=
1
−
0.11
(
A
IA
−
1
)
. We find 
S
8
D
IA
=
0.89
5
+
0.054
−
0.039
, where systematics are at the level of roughly 60% of the statistical errors. We discuss these results in the context of earlier cosmic shear analyses of the DES Y1 data. Our findings indicate that this method and its fast runtime offer good prospects for cosmic shear measurements with future wide-field surveys.
date: 2020-04-15
date_type: published
publisher: AMER PHYSICAL SOC
official_url: https://doi.org/10.1103/PhysRevD.101.082003
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 1782929
doi: 10.1103/PhysRevD.101.082003
lyricists_name: Brandner, Sebastian
lyricists_name: Brooks, David
lyricists_name: Doel, Andrew
lyricists_id: SBRAN30
lyricists_id: DBROO45
lyricists_id: APDOE12
actors_name: Flynn, Bernadette
actors_id: BFFLY94
actors_role: owner
full_text_status: public
publication: Physical Review D
volume: 101
number: 8
article_number: 082003
pages: 29
citation:        Kacprzak, T;    Herbel, J;    Nicola, A;    Sgier, R;    Tarsitano, F;    Bruderer, C;    Amara, A;                                                                                                                                                                                                 ... Weller, J; + view all <#>        Kacprzak, T;  Herbel, J;  Nicola, A;  Sgier, R;  Tarsitano, F;  Bruderer, C;  Amara, A;  Refregier, A;  Bridle, SL;  Drlica-Wagner, A;  Gruen, D;  Hartley, WG;  Hoyle, B;  Secco, LF;  Zuntz, J;  Annis, J;  Avila, S;  Bertin, E;  Brooks, D;  Buckley-Geer, E;  Carnero Rosell, A;  Kind, MC;  Carretero, J;  Da Costa, LN;  De Vicente, J;  Desai, S;  Diehl, HT;  Doel, P;  Garcia-Bellido, J;  Gaztanaga, E;  Gruendl, RA;  Gschwend, J;  Gutierrez, G;  Hollowood, DL;  Honscheid, K;  James, DJ;  Jarvis, M;  Lima, M;  Maia, MAG;  Marshall, JL;  Melchior, P;  Menanteau, F;  Miquel, R;  Paz-Chinchon, F;  Plazas, AA;  Sanchez, E;  Scarpine, V;  Serrano, S;  Sevilla-Noarbe, I;  Smith, M;  Suchyta, E;  Swanson, MEC;  Tarle, G;  Vikram, V;  Weller, J;   - view fewer <#>    (2020)    Monte Carlo control loops for cosmic shear cosmology with DES Year 1 data.                   Physical Review D , 101  (8)    , Article 082003.  10.1103/PhysRevD.101.082003 <https://doi.org/10.1103/PhysRevD.101.082003>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10098304/1/PhysRevD.101.082003.pdf