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Title: Survey geometry and the internal consistency of recent cosmic shear measurements

Here, we explore the impact of an update to the typical approximation for the shape noise term in the analytic covariance matrix for cosmic shear experiments that assumes the absence of survey boundary and mask effects. We present an exact expression for the number of galaxy pairs in this term based on the the survey mask, which leads to more than a factor of three increase in the shape noise on the largest measured scales for the Kilo-Degree Survey (KIDS-450) real-space cosmic shear data. We compare the result of this analytic expression to several alternative methods for measuring the shape noise from the data and find excellent agreement. This update to the covariance resolves any internal model tension evidenced by the previously large cosmological best-fit $$\chi^2$$ for the KiDS-450 cosmic shear data. The best-fit $$\chi^2$$ is reduced from 161 to 121 for 118 degrees of freedom. We also apply a correction to how the multiplicative shear calibration uncertainty is included in the covariance. This change, along with a previously known update to the reported effective angular values of the data vector, jointly shift the inferred amplitude of the correlation function to higher values. Lastly, we find that this improves agreement of the KiDS-450 cosmic shear results with Dark Energy Survey Year 1 and Planck results.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ; ORCiD logo [5] ;  [1] ;  [6] ;  [7] ;  [8] ;  [9] ;  [10] ; ORCiD logo [4] ;  [6] ;  [11] ;  [12] ;  [13] ;  [14] ; ORCiD logo [10] ; ORCiD logo [9] more »;  [15] ;  [16] ;  [10] ;  [17] ; ORCiD logo [18] ;  [14] ;  [19] ;  [17] ;  [17] ; ORCiD logo [20] ;  [21] ;  [14] ;  [5] ;  [22] ;  [23] ;  [10] ; ORCiD logo [24] ;  [7] ;  [11] ;  [22] ;  [25] ;  [17] ;  [14] ;  [26] ;  [17] ;  [24] ;  [27] ;  [28] ;  [24] ;  [26] ;  [23] ;  [22] ;  [17] ;  [29] ;  [30] ;  [1] ;  [31] ;  [14] ;  [32] ;  [17] ;  [27] ;  [33] ; ORCiD logo [11] ;  [23] ;  [34] ;  [35] ;  [22] ;  [36] ;  [5] ;  [25] ;  [17] ;  [37] ;  [25] ;  [38] ;  [39] ;  [40] ; ORCiD logo [41] ;  [42] ;  [20] ;  [43] ;  [44] « less
  1. Center for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USA; Department of Physics, The Ohio State University, Columbus, OH 43210, USA
  2. Department of Astronomy/Steward Observatory, 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA; Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA
  3. Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
  4. Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse, 85748 Garching, Germany; Universitäts-Sternwarte, Fakultät für Physik, Ludwig-Maximilians Universität München, Scheinerstr. 1, 81679 München, Germany
  5. Kavli Institute for Particle Astrophysics & Cosmology, P. O. Box 2450, Stanford University, Stanford, CA 94305, USA; SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
  6. Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA
  7. Kavli Institute for Particle Astrophysics & Cosmology, P. O. Box 2450, Stanford University, Stanford, CA 94305, USA
  8. Department of Physics, Stanford University, 382 Via Pueblo Mall, Stanford, CA 94305, USA; Kavli Institute for Particle Astrophysics & Cosmology, P. O. Box 2450, Stanford University, Stanford, CA 94305, USA
  9. Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15312, USA
  10. Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, 08193 Bellaterra (Barcelona) Spain
  11. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA
  12. Département de Physique Théorique and Center for Astroparticle Physics, Université de Genève, 24 quai Ernest Ansermet, CH-1211 Geneva, Switzerland; Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil
  13. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK; Kavli Institute for Cosmology, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
  14. Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UK
  15. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA; Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, 08193 Bellaterra (Barcelona) Spain
  16. Brookhaven National Laboratory, Bldg 510, Upton, NY 11973, USA
  17. Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, IL 60510, USA
  18. Institute for Astronomy, University of Edinburgh, Edinburgh EH9 3HJ, UK
  19. Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UK; Department of Physics and Electronics, Rhodes University, PO Box 94, Grahamstown, 6140, South Africa
  20. Institute of Cosmology & Gravitation, University of Portsmouth, Portsmouth, PO1 3FX, UK
  21. CNRS, UMR 7095, Institut d’Astrophysique de Paris, F-75014, Paris, France; Sorbonne Universités, UPMC Univ Paris 06, UMR 7095, Institut d’Astrophysique de Paris, F-75014, Paris, France
  22. Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil; Observatório Nacional, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil
  23. Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, IL 61801, USA; National Center for Supercomputing Applications, 1205 West Clark St., Urbana, IL 61801, USA
  24. Institut d’Estudis Espacials de Catalunya (IEEC), 08193 Barcelona, Spain; Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, 08193 Barcelona, Spain
  25. Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
  26. Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA; Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA
  27. Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, IL 60510, USA; Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
  28. Instituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, 28049 Madrid, Spain
  29. Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UK; Department of Physics, ETH Zurich, Wolfgang-Pauli-Strasse 16, CH-8093 Zurich, Switzerland
  30. Santa Cruz Institute for Particle Physics, Santa Cruz, CA 95064, USA
  31. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA
  32. Australian Astronomical Observatory, North Ryde, NSW 2113, Australia
  33. Departamento de Física Matemática, Instituto de Física, Universidade de São Paulo, CP 66318, São Paulo, SP, 05314-970, Brazil; Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil
  34. Institució Catalana de Recerca i Estudis Avançats, E-08010 Barcelona, Spain; Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, 08193 Bellaterra (Barcelona) Spain
  35. Excellence Cluster Universe, Boltzmannstr. 2, 85748 Garching, Germany; Faculty of Physics, Ludwig-Maximilians-Universität, Scheinerstr. 1, 81679 Munich, Germany; Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse, 85748 Garching, Germany
  36. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA
  37. SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
  38. School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK
  39. Brandeis University, Physics Department, 415 South Street, Waltham MA 02453
  40. Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, 13083-859, Campinas, SP, Brazil; Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil
  41. Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
  42. National Center for Supercomputing Applications, 1205 West Clark St., Urbana, IL 61801, USA
  43. Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, Casilla 603, La Serena, Chile
  44. Department of Physics, Stanford University, 382 Via Pueblo Mall, Stanford, CA 94305, USA; Kavli Institute for Particle Astrophysics & Cosmology, P. O. Box 2450, Stanford University, Stanford, CA 94305, USA; SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
Publication Date:
Report Number(s):
FERMILAB-PUB-18-128-A-PPD; arXiv:1804.10663
Journal ID: ISSN 1745-3925; 1670861
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society: Letters
Additional Journal Information:
Journal Name: Monthly Notices of the Royal Astronomical Society: Letters; Journal ID: ISSN 1745-3925
Publisher:
Royal Astronomical Society
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
DES Collaboration
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; gravitational lensing: weak; methods: data analysis; methods: statistical
OSTI Identifier:
1439462