Weak Lensing of Type Ia Supernovae from the Dark Energy Survey
Abstract
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 , and find . 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 . The comparable uncertainty in 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.
Keywords
Cite
@article{arxiv.2007.07956,
title = {Weak Lensing of Type Ia Supernovae from the Dark Energy Survey},
author = {E. Macaulay and D. Bacon and R. C. Nichol and T. M. Davis and J. Elvin-Poole and D. Brout and D. Carollo and K. Glazebrook and S. R. Hinton and G. F. Lewis and C. Lidman and A. Möller and M. Sako and D. Scolnic and M. Smith and N. E. Sommer and B. E. Tucker and T. M. C. Abbott and M. Aguena and J. Annis and S. Avila and E. Bertin and S. Bhargava and D. Brooks and D. L. Burke and A. Carnero Rosell and M. Carrasco Kind and J. Carretero and F. J. Castander and M. Costanzi and L. N. da Costa and S. Desai and H. T. Diehl and P. Doel and B. Flaugher and R. J. Foley and J. García-Bellido and E. Gaztanaga and D. W. Gerdes and D. Gruen and R. A. Gruendl and J. Gschwend and G. Gutierrez and D. L. Hollowood and K. Honscheid and D. Huterer and D. J. James and K. Kuehn and N. Kuropatkin and O. Lahav and M. Lima and M. A. G. Maia and J. L. Marshall and P. Melchior and F. Menanteau and R. Miquel and A. Palmese and A. A. Plazas and A. K. Romer and A. Roodman and E. Sanchez and V. Scarpine and M. Schubnell and S. Serrano and I. Sevilla-Noarbe and M. Soares-Santos and E. Suchyta and M. E. C. Swanson and G. Tarle and T. N. Varga and A. R. Walker and J. Weller},
journal= {arXiv preprint arXiv:2007.07956},
year = {2020}
}
Comments
10 pages, 7 figures, MNRAS