Weak lensing of Type Ia Supernovae from the Dark Energy Survey

Journal Article (Review;Journal)

We consider the effects of weak gravitational lensing on observations of 196 spectroscopically confirmed Type Ia Supernovae (SNe Ia) from years 1 to 3 of the Dark Energy Survey (DES).We simultaneously measure both the angular correlation function and the non-Gaussian skewness caused by weak lensing. This approach has the advantage of being insensitive to the intrinsic dispersion of SNe Ia magnitudes. We model the amplitude of both effects as a function of σ8, and find σ8 =1.2+0.9-0.8. We also apply our method to a subsample of 488 SNe from the Joint Light-curve Analysis (JLA; chosen to match the redshift range we use for this work), and find σ8 =0.8+1.1-0.7. The comparable uncertainty in σ8 between DES-SN and the larger number of SNe from JLA highlights the benefits of homogeneity of the DES-SN sample, and improvements in the calibration and data analysis.

Full Text

Duke Authors

Cited Authors

  • MacAulay, E; Bacon, D; Nichol, RC; Davis, TM; Elvin-Poole, J; Brout, D; Carollo, D; Glazebrook, K; Hinton, SR; Lewis, GF; Lidman, C; Möller, A; Sako, M; Scolnic, D; Smith, M; Sommer, NE; Tucker, BE; Abbott, TMC; Aguena, M; Annis, J; Avila, S; Bertin, E; Bhargava, S; Brooks, D; Burke, DL; Rosell, AC; Kind, MC; Carretero, J; Castander, FJ; Costanzi, M; Da Costa, LND; Desai, S; Diehl, HT; Doel, P; Flaugher, B; Foley, RJ; García-Bellido, J; Gaztanaga, E; Gerdes, DW; Gruen, D; Gruendl, RA; Gschwend, J; Gutierrez, G; Hollowood, DL; Honscheid, K; Huterer, D; James, DJ; Kuehn, K; Kuropatkin, N; Lahav, O; Lima, M; Maia, MAG; Marshall, JL; Melchior, P; Menanteau, F; Palmese, A; Plazas, AA; Romer, AK; Roodman, A; Sanchez, E; Scarpine, V; Schubnell, M; Serrano, S; Sevilla-Noarbe, I; Soares-Santos, M; Suchyta, E; Swanson, MEC; Tarle, G; Varga, TN; Walker, AR; Weller, J

Published Date

  • January 1, 2020

Published In

Volume / Issue

  • 496 / 3

Start / End Page

  • 4051 - 4059

Electronic International Standard Serial Number (EISSN)

  • 1365-2966

International Standard Serial Number (ISSN)

  • 0035-8711

Digital Object Identifier (DOI)

  • 10.1093/MNRAS/STAA1852

Citation Source

  • Scopus