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Title: Dark Energy Survey Year 1 Results: redshift distributions of the weak-lensing source galaxies

Abstract

We describe the derivation and validation of redshift distribution estimates and their uncertainties for the galaxies used as weak lensing sources in the Dark Energy Survey (DES) Year 1 cosmological analyses. The Bayesian Photometric Redshift (BPZ) code is used to assign galaxies to four redshift bins between z=0.2 and 1.3, and to produce initial estimates of the lensing-weighted redshift distributions $$n^i_{PZ}(z)$$ for bin i. Accurate determination of cosmological parameters depends critically on knowledge of $n^i$ but is insensitive to bin assignments or redshift errors for individual galaxies. The cosmological analyses allow for shifts $$n^i(z)=n^i_{PZ}(z-\Delta z^i)$$ to correct the mean redshift of $n^i(z)$ for biases in $$n^i_{\rm PZ}$$. The $$\Delta z^i$$ are constrained by comparison of independently estimated 30-band photometric redshifts of galaxies in the COSMOS field to BPZ estimates made from the DES griz fluxes, for a sample matched in fluxes, pre-seeing size, and lensing weight to the DES weak-lensing sources. In companion papers, the $$\Delta z^i$$ are further constrained by the angular clustering of the source galaxies around red galaxies with secure photometric redshifts at 0.15

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [10];  [7];  [9]; ORCiD logo [11];  [11];  [12];  [13];  [14];  [8];  [11];  [15] more »;  [16];  [17];  [7];  [18];  [18];  [19];  [14];  [20];  [11];  [21];  [15];  [22];  [22];  [23];  [22];  [24];  [25];  [26];  [20];  [22];  [15];  [27];  [28];  [29];  [30];  [15];  [31];  [2];  [32];  [33];  [2];  [31];  [5];  [34];  [29];  [29];  [35];  [1];  [11];  [29];  [29];  [36];  [37];  [20];  [20];  [38];  [39];  [40];  [41];  [20];  [2];  [10];  [30];  [11];  [7];  [3];  [15];  [42];  [43];  [20];  [41];  [44];  [20];  [45];  [11];  [20];  [7];  [46];  [47];  [45];  [48];  [49];  [17];  [20];  [9];  [50];  [3];  [51];  [52];  [52];  [41];  [10];  [53];  [20];  [41];  [20];  [54];  [3];  [42];  [55];  [17];  [56];  [20];  [14];  [57];  [58];  [3];  [5];  [59];  [20];  [60];  [61];  [19];  [36];  [20];  [62];  [63];  [52];  [61];  [30];  [20];  [53];  [36];  [64];  [20];  [3];  [20];  [65] « less
  1. Universitäts-Sternwarte, Fakultät für Physik, Ludwig-Maximilians Universität München, Scheinerstr. 1, D-81679 München, Germany; Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse, D-85748 Garching, Germany
  2. Kavli Institute for Particle Astrophysics and Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA; SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
  3. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA
  4. Universitäts-Sternwarte, Fakultät für Physik, Ludwig-Maximilians Universität München, Scheinerstr. 1, D-81679 München, Germany
  5. Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
  6. Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, UK; Department of Physics, ETH Zurich, Wolfgang-Pauli-Strasse 16, CH-8093 Zurich, Switzerland
  7. Institute of Space Sciences, IEEC-CSIC, Campus UAB, Carrer de Can Magrans, s/n, E-08193 Barcelona, Spain
  8. Kavli Institute for Particle Astrophysics and Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA; Department of Physics, Stanford University, 382 Via Pueblo Mall, Stanford, CA 94305, USA
  9. 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
  10. Kavli Institute for Particle Astrophysics and Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA
  11. Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra (Barcelona) Spain
  12. Brookhaven National Laboratory, Bldg 510, Upton, NY 11973, USA
  13. Kavli Institute for Particle Astrophysics and Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA; SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA; Department of Physics, Stanford University, 382 Via Pueblo Mall, Stanford, CA 94305, USA
  14. ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), University of Syndey; School of Mathematics and Physics, University of Queensland, Brisbane, QLD 4072, Australia
  15. 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
  16. ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), University of Syndey; INAF – Osservatorio Astrofisico di Torino, Pino Torinese, Italy
  17. Department of Astronomy, University of Illinois, 1002 W. Green Street, Urbana, IL 61801, USA; National Center for Supercomputing Applications, 1205 West Clark St., Urbana, IL 61801, USA
  18. Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
  19. School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK
  20. Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA
  21. Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Victoria 3122, Australia
  22. School of Mathematics and Physics, University of Queensland, Brisbane, QLD 4072, Australia
  23. Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
  24. Australian Astronomical Observatory, North Ryde, NSW 2113, Australia
  25. ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), University of Syndey; Sydney Institute for Astronomy, School of Physics, A28, The University of Sydney, NSW 2006, Australia
  26. ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), University of Syndey; Australian Astronomical Observatory, North Ryde, NSW 2113, Australia
  27. Center for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USA; Department of Astronomy, The Ohio State University, Columbus, OH 43210, USA
  28. Department of Astronomy, The Ohio State University, Columbus, OH 43210, USA
  29. ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), University of Syndey; The Research School of Astronomy and Astrophysics, Australian National University, ACT 2601, Australia
  30. Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth, PO1 3FX, UK
  31. Jodrell Bank Center for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
  32. Center for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USA
  33. Department of Physics, University of Arizona, Tucson, AZ 85721, USA
  34. The Research School of Astronomy and Astrophysics, Australian National University, ACT 2601, Australia
  35. ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), University of Syndey; Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, Jiangshu 210008, China
  36. Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, Casilla 603, La Serena, Chile
  37. Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, UK; Department of Physics and Electronics, Rhodes University, PO Box 94, Grahamstown 6140, South Africa
  38. LSST, 933 North Cherry Avenue, Tucson, AZ 85721, USA
  39. Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, UK; CNRS, UMR 7095, Institut d’Astrophysique de Paris, F-75014, Paris, France; Institut d’Astrophysique de Paris, Sorbonne Universités, UPMC Univ Paris 06, UMR 7095, F-75014, Paris, France
  40. CNRS, UMR 7095, Institut d’Astrophysique de Paris, F-75014, Paris, France; Institut d’Astrophysique de Paris, Sorbonne Universités, UPMC Univ Paris 06, UMR 7095, F-75014, Paris, France
  41. Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, UK
  42. George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, and Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USA
  43. Department of Physics, IIT Hyderabad, Kandi, Telangana 502285, India
  44. Department of Physics, California Institute of Technology, Pasadena, CA 91125, USA; Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA
  45. Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA; Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA
  46. Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA; Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA
  47. Instituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, 28049 Madrid, Spain
  48. Universitäts-Sternwarte, Fakultät für Physik, Ludwig-Maximilians Universität München, Scheinerstr. 1, D-81679 München, Germany; 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
  49. Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA; Department of Astronomy, University of California, Berkeley, 501 Campbell Hall, Berkeley, CA 94720, USA
  50. Astronomy Department, University of Washington, Box 351580, Seattle, WA 98195, USA
  51. Santa Cruz Institute for Particle Physics, Santa Cruz, CA 95064, USA
  52. National Center for Supercomputing Applications, 1205 West Clark St., Urbana, IL 61801, USA
  53. Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439, USA
  54. Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil; Departamento de Física Matemática, Instituto de Física, Universidade de São Paulo, CP 66318, São Paulo, SP 05314-970, Brazil
  55. Department of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton, NJ 08544, USA
  56. Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra (Barcelona) Spain; Institució Catalana de Recerca i Estudis Avançats, E-08010 Barcelona, Spain
  57. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA
  58. Department of Physics and Astronomy, Pevensey Building, University of Sussex, Brighton, BN1 9QH, UK
  59. Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil; Instituto de Física, UFRGS, Caixa Postal 15051, Porto Alegre, RS - 91501-970, Brazil
  60. SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
  61. Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA
  62. Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil; Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, 13083-859, Campinas, SP, Brazil
  63. Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
  64. Universitäts-Sternwarte, Fakultät für Physik, Ludwig-Maximilians Universität München, Scheinerstr. 1, D-81679 München, Germany; Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse, D-85748 Garching, Germany; Excellence Cluster Universe, Boltzmannstr. 2, D-85748 Garching, Germany
  65. Institute for Astronomy, University of Edinburgh, Edinburgh EH9 3HJ, UK
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); 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 Org.:
DES Collaboration
OSTI Identifier:
1375907
Report Number(s):
FERMILAB-PUB-17-293-AE; arXiv:1708.01532
Journal ID: ISSN 0035-8711; 1614455
Grant/Contract Number:
AC02-07CH11359
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Volume: 478; Journal Issue: 1; Journal ID: ISSN 0035-8711
Publisher:
Royal Astronomical Society
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; methods: data analysis; catalogues; surveys

Citation Formats

Hoyle, B., Gruen, D., Bernstein, G. M., Rau, M. M., De Vicente, J., Hartley, W. G., Gaztanaga, E., DeRose, J., Troxel, M. A., Davis, C., Alarcon, A., MacCrann, N., Prat, J., Sánchez, C., Sheldon, E., Wechsler, R. H., Asorey, J., Becker, M. R., Bonnett, C., Rosell, A. Carnero, Carollo, D., Kind, M. Carrasco, Castander, F. J., Cawthon, R., Chang, C., Childress, M., Davis, T. M., Drlica-Wagner, A., Gatti, M., Glazebrook, K., Gschwend, J., Hinton, S. R., Hoormann, J. K., Kim, A. G., King, A., Kuehn, K., Lewis, G., Lidman, C., Lin, H., Macaulay, E., Maia, M. A. G., Martini, P., Mudd, D., Möller, A., Nichol, R. C., Ogando, R. L. C., Rollins, R. P., Roodman, A., Ross, A. J., Rozo, E., Rykoff, E. S., Samuroff, S., Sevilla-Noarbe, I., Sharp, R., Sommer, N. E., Tucker, B. E., Uddin, S. A., Varga, T. N., Vielzeuf, P., Yuan, F., Zhang, B., Abbott, T. M. C., Abdalla, F. B., Allam, S., Annis, J., Bechtol, K., Benoit-Lévy, A., Bertin, E., Brooks, D., Buckley-Geer, E., Burke, D. L., Busha, M. T., Capozzi, D., Carretero, J., Crocce, M., D’Andrea, C. B., da Costa, L. N., DePoy, D. L., Desai, S., Diehl, H. T., Doel, P., Eifler, T. F., Estrada, J., Evrard, A. E., Fernandez, E., Flaugher, B., Fosalba, P., Frieman, J., García-Bellido, J., Gerdes, D. W., Giannantonio, T., Goldstein, D. A., Gruendl, R. A., Gutierrez, G., Honscheid, K., James, D. J., Jarvis, M., Jeltema, T., Johnson, M. W. G., Johnson, M. D., Kirk, D., Krause, E., Kuhlmann, S., Kuropatkin, N., Lahav, O., Li, T. S., Lima, M., March, M., Marshall, J. L., Melchior, P., Menanteau, F., Miquel, R., Nord, B., O’Neill, C. R., Plazas, A. A., Romer, A. K., Sako, M., Sanchez, E., Santiago, B., Scarpine, V., Schindler, R., Schubnell, M., Smith, M., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Tucker, D. L., Vikram, V., Walker, A. R., Weller, J., Wester, W., Wolf, R. C., Yanny, B., and Zuntz, J. Dark Energy Survey Year 1 Results: redshift distributions of the weak-lensing source galaxies. United States: N. p., 2018. Web. doi:10.1093/mnras/sty957.
Hoyle, B., Gruen, D., Bernstein, G. M., Rau, M. M., De Vicente, J., Hartley, W. G., Gaztanaga, E., DeRose, J., Troxel, M. A., Davis, C., Alarcon, A., MacCrann, N., Prat, J., Sánchez, C., Sheldon, E., Wechsler, R. H., Asorey, J., Becker, M. R., Bonnett, C., Rosell, A. Carnero, Carollo, D., Kind, M. Carrasco, Castander, F. J., Cawthon, R., Chang, C., Childress, M., Davis, T. M., Drlica-Wagner, A., Gatti, M., Glazebrook, K., Gschwend, J., Hinton, S. R., Hoormann, J. K., Kim, A. G., King, A., Kuehn, K., Lewis, G., Lidman, C., Lin, H., Macaulay, E., Maia, M. A. G., Martini, P., Mudd, D., Möller, A., Nichol, R. C., Ogando, R. L. C., Rollins, R. P., Roodman, A., Ross, A. J., Rozo, E., Rykoff, E. S., Samuroff, S., Sevilla-Noarbe, I., Sharp, R., Sommer, N. E., Tucker, B. E., Uddin, S. A., Varga, T. N., Vielzeuf, P., Yuan, F., Zhang, B., Abbott, T. M. C., Abdalla, F. B., Allam, S., Annis, J., Bechtol, K., Benoit-Lévy, A., Bertin, E., Brooks, D., Buckley-Geer, E., Burke, D. L., Busha, M. T., Capozzi, D., Carretero, J., Crocce, M., D’Andrea, C. B., da Costa, L. N., DePoy, D. L., Desai, S., Diehl, H. T., Doel, P., Eifler, T. F., Estrada, J., Evrard, A. E., Fernandez, E., Flaugher, B., Fosalba, P., Frieman, J., García-Bellido, J., Gerdes, D. W., Giannantonio, T., Goldstein, D. A., Gruendl, R. A., Gutierrez, G., Honscheid, K., James, D. J., Jarvis, M., Jeltema, T., Johnson, M. W. G., Johnson, M. D., Kirk, D., Krause, E., Kuhlmann, S., Kuropatkin, N., Lahav, O., Li, T. S., Lima, M., March, M., Marshall, J. L., Melchior, P., Menanteau, F., Miquel, R., Nord, B., O’Neill, C. R., Plazas, A. A., Romer, A. K., Sako, M., Sanchez, E., Santiago, B., Scarpine, V., Schindler, R., Schubnell, M., Smith, M., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Tucker, D. L., Vikram, V., Walker, A. R., Weller, J., Wester, W., Wolf, R. C., Yanny, B., & Zuntz, J. Dark Energy Survey Year 1 Results: redshift distributions of the weak-lensing source galaxies. United States. doi:10.1093/mnras/sty957.
Hoyle, B., Gruen, D., Bernstein, G. M., Rau, M. M., De Vicente, J., Hartley, W. G., Gaztanaga, E., DeRose, J., Troxel, M. A., Davis, C., Alarcon, A., MacCrann, N., Prat, J., Sánchez, C., Sheldon, E., Wechsler, R. H., Asorey, J., Becker, M. R., Bonnett, C., Rosell, A. Carnero, Carollo, D., Kind, M. Carrasco, Castander, F. J., Cawthon, R., Chang, C., Childress, M., Davis, T. M., Drlica-Wagner, A., Gatti, M., Glazebrook, K., Gschwend, J., Hinton, S. R., Hoormann, J. K., Kim, A. G., King, A., Kuehn, K., Lewis, G., Lidman, C., Lin, H., Macaulay, E., Maia, M. A. G., Martini, P., Mudd, D., Möller, A., Nichol, R. C., Ogando, R. L. C., Rollins, R. P., Roodman, A., Ross, A. J., Rozo, E., Rykoff, E. S., Samuroff, S., Sevilla-Noarbe, I., Sharp, R., Sommer, N. E., Tucker, B. E., Uddin, S. A., Varga, T. N., Vielzeuf, P., Yuan, F., Zhang, B., Abbott, T. M. C., Abdalla, F. B., Allam, S., Annis, J., Bechtol, K., Benoit-Lévy, A., Bertin, E., Brooks, D., Buckley-Geer, E., Burke, D. L., Busha, M. T., Capozzi, D., Carretero, J., Crocce, M., D’Andrea, C. B., da Costa, L. N., DePoy, D. L., Desai, S., Diehl, H. T., Doel, P., Eifler, T. F., Estrada, J., Evrard, A. E., Fernandez, E., Flaugher, B., Fosalba, P., Frieman, J., García-Bellido, J., Gerdes, D. W., Giannantonio, T., Goldstein, D. A., Gruendl, R. A., Gutierrez, G., Honscheid, K., James, D. J., Jarvis, M., Jeltema, T., Johnson, M. W. G., Johnson, M. D., Kirk, D., Krause, E., Kuhlmann, S., Kuropatkin, N., Lahav, O., Li, T. S., Lima, M., March, M., Marshall, J. L., Melchior, P., Menanteau, F., Miquel, R., Nord, B., O’Neill, C. R., Plazas, A. A., Romer, A. K., Sako, M., Sanchez, E., Santiago, B., Scarpine, V., Schindler, R., Schubnell, M., Smith, M., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Tucker, D. L., Vikram, V., Walker, A. R., Weller, J., Wester, W., Wolf, R. C., Yanny, B., and Zuntz, J. Wed . "Dark Energy Survey Year 1 Results: redshift distributions of the weak-lensing source galaxies". United States. doi:10.1093/mnras/sty957.
@article{osti_1375907,
title = {Dark Energy Survey Year 1 Results: redshift distributions of the weak-lensing source galaxies},
author = {Hoyle, B. and Gruen, D. and Bernstein, G. M. and Rau, M. M. and De Vicente, J. and Hartley, W. G. and Gaztanaga, E. and DeRose, J. and Troxel, M. A. and Davis, C. and Alarcon, A. and MacCrann, N. and Prat, J. and Sánchez, C. and Sheldon, E. and Wechsler, R. H. and Asorey, J. and Becker, M. R. and Bonnett, C. and Rosell, A. Carnero and Carollo, D. and Kind, M. Carrasco and Castander, F. J. and Cawthon, R. and Chang, C. and Childress, M. and Davis, T. M. and Drlica-Wagner, A. and Gatti, M. and Glazebrook, K. and Gschwend, J. and Hinton, S. R. and Hoormann, J. K. and Kim, A. G. and King, A. and Kuehn, K. and Lewis, G. and Lidman, C. and Lin, H. and Macaulay, E. and Maia, M. A. G. and Martini, P. and Mudd, D. and Möller, A. and Nichol, R. C. and Ogando, R. L. C. and Rollins, R. P. and Roodman, A. and Ross, A. J. and Rozo, E. and Rykoff, E. S. and Samuroff, S. and Sevilla-Noarbe, I. and Sharp, R. and Sommer, N. E. and Tucker, B. E. and Uddin, S. A. and Varga, T. N. and Vielzeuf, P. and Yuan, F. and Zhang, B. and Abbott, T. M. C. and Abdalla, F. B. and Allam, S. and Annis, J. and Bechtol, K. and Benoit-Lévy, A. and Bertin, E. and Brooks, D. and Buckley-Geer, E. and Burke, D. L. and Busha, M. T. and Capozzi, D. and Carretero, J. and Crocce, M. and D’Andrea, C. B. and da Costa, L. N. and DePoy, D. L. and Desai, S. and Diehl, H. T. and Doel, P. and Eifler, T. F. and Estrada, J. and Evrard, A. E. and Fernandez, E. and Flaugher, B. and Fosalba, P. and Frieman, J. and García-Bellido, J. and Gerdes, D. W. and Giannantonio, T. and Goldstein, D. A. and Gruendl, R. A. and Gutierrez, G. and Honscheid, K. and James, D. J. and Jarvis, M. and Jeltema, T. and Johnson, M. W. G. and Johnson, M. D. and Kirk, D. and Krause, E. and Kuhlmann, S. and Kuropatkin, N. and Lahav, O. and Li, T. S. and Lima, M. and March, M. and Marshall, J. L. and Melchior, P. and Menanteau, F. and Miquel, R. and Nord, B. and O’Neill, C. R. and Plazas, A. A. and Romer, A. K. and Sako, M. and Sanchez, E. and Santiago, B. and Scarpine, V. and Schindler, R. and Schubnell, M. and Smith, M. and Smith, R. C. and Soares-Santos, M. and Sobreira, F. and Suchyta, E. and Swanson, M. E. C. and Tarle, G. and Thomas, D. and Tucker, D. L. and Vikram, V. and Walker, A. R. and Weller, J. and Wester, W. and Wolf, R. C. and Yanny, B. and Zuntz, J.},
abstractNote = {We describe the derivation and validation of redshift distribution estimates and their uncertainties for the galaxies used as weak lensing sources in the Dark Energy Survey (DES) Year 1 cosmological analyses. The Bayesian Photometric Redshift (BPZ) code is used to assign galaxies to four redshift bins between z=0.2 and 1.3, and to produce initial estimates of the lensing-weighted redshift distributions $n^i_{PZ}(z)$ for bin i. Accurate determination of cosmological parameters depends critically on knowledge of $n^i$ but is insensitive to bin assignments or redshift errors for individual galaxies. The cosmological analyses allow for shifts $n^i(z)=n^i_{PZ}(z-\Delta z^i)$ to correct the mean redshift of $n^i(z)$ for biases in $n^i_{\rm PZ}$. The $\Delta z^i$ are constrained by comparison of independently estimated 30-band photometric redshifts of galaxies in the COSMOS field to BPZ estimates made from the DES griz fluxes, for a sample matched in fluxes, pre-seeing size, and lensing weight to the DES weak-lensing sources. In companion papers, the $\Delta z^i$ are further constrained by the angular clustering of the source galaxies around red galaxies with secure photometric redshifts at 0.15},
doi = {10.1093/mnras/sty957},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 1,
volume = 478,
place = {United States},
year = {Wed Apr 18 00:00:00 EDT 2018},
month = {Wed Apr 18 00:00:00 EDT 2018}
}

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