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DESI Complete Calibration of the Color-Redshift Relation (DC3R2): Results from early DESI data

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Main Authors:	McCullough, J., Gruen, D., Amon, A., Roodman, A., Masters, D., Raichoor, A., Schlegel, D., Canning, R., Castander, F. J., DeRose, J., Miquel, R., Myles, J., Newman, J. A., Slosar, A., Speagle, J., Wilson, M. J., Aguilar, J., Ahlen, S., Bailey, S., Brooks, D., Claybaugh, T., Cole, S., Dawson, K., de la Macorra, A., Doel, P., Forero-Romero, J. E., Gontcho, S. Gontcho A, Guy, J., Kehoe, R., Kremin, A., Landriau, M., Guillou, L. Le, Levi, M., Manera, M., Martini, P., Meisner, A., Moustakas, J., Nie, J., Percival, W. J., Poppett, C., Prada, F., Rezaie, M., Rossi, G., Sanchez, E., Seo, H., Tarlé, G., Weaver, B. A., Zhou, Z., Zou, H.
Format:	Preprint
Published:	2023
Subjects:	Cosmology and Nongalactic Astrophysics
Online Access:	Acceder al recurso
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_version_	1866916296615002112
author	McCullough, J. Gruen, D. Amon, A. Roodman, A. Masters, D. Raichoor, A. Schlegel, D. Canning, R. Castander, F. J. DeRose, J. Miquel, R. Myles, J. Newman, J. A. Slosar, A. Speagle, J. Wilson, M. J. Aguilar, J. Ahlen, S. Bailey, S. Brooks, D. Claybaugh, T. Cole, S. Dawson, K. de la Macorra, A. Doel, P. Forero-Romero, J. E. Gontcho, S. Gontcho A Guy, J. Kehoe, R. Kremin, A. Landriau, M. Guillou, L. Le Levi, M. Manera, M. Martini, P. Meisner, A. Moustakas, J. Nie, J. Percival, W. J. Poppett, C. Prada, F. Rezaie, M. Rossi, G. Sanchez, E. Seo, H. Tarlé, G. Weaver, B. A. Zhou, Z. Zou, H.
author_facet	McCullough, J. Gruen, D. Amon, A. Roodman, A. Masters, D. Raichoor, A. Schlegel, D. Canning, R. Castander, F. J. DeRose, J. Miquel, R. Myles, J. Newman, J. A. Slosar, A. Speagle, J. Wilson, M. J. Aguilar, J. Ahlen, S. Bailey, S. Brooks, D. Claybaugh, T. Cole, S. Dawson, K. de la Macorra, A. Doel, P. Forero-Romero, J. E. Gontcho, S. Gontcho A Guy, J. Kehoe, R. Kremin, A. Landriau, M. Guillou, L. Le Levi, M. Manera, M. Martini, P. Meisner, A. Moustakas, J. Nie, J. Percival, W. J. Poppett, C. Prada, F. Rezaie, M. Rossi, G. Sanchez, E. Seo, H. Tarlé, G. Weaver, B. A. Zhou, Z. Zou, H.
contents	We present initial results from the Dark Energy Spectroscopic Instrument (DESI) Complete Calibration of the Color-Redshift Relation (DC3R2) secondary target survey. Our analysis uses 230k galaxies that overlap with KiDS-VIKING $ugriZYJHK_s$ photometry to calibrate the color-redshift relation and to inform photometric redshift (photo-z) inference methods of future weak lensing surveys. Together with Emission Line Galaxies (ELGs), Luminous Red Galaxies (LRGs), and the Bright Galaxy Survey (BGS) that provide samples of complementary color, the DC3R2 targets help DESI to span 56% of the color space visible to Euclid and LSST with high confidence spectroscopic redshifts. The effects of spectroscopic completeness and quality are explored, as well as systematic uncertainties introduced with the use of common Self Organizing Maps trained on different photometry than the analysis sample. We further examine the dependence of redshift on magnitude at fixed color, important for the use of bright galaxy spectra to calibrate redshifts in a fainter photometric galaxy sample. We find that noise in the KiDS-VIKING photometry introduces a dominant, apparent magnitude dependence of redshift at fixed color, which indicates a need for carefully chosen deep drilling fields, and survey simulation to model this effect for future weak lensing surveys.
format	Preprint
id	arxiv_https___arxiv_org_abs_2309_13109
institution	arXiv
publishDate	2023
record_format	arxiv
spellingShingle	DESI Complete Calibration of the Color-Redshift Relation (DC3R2): Results from early DESI data McCullough, J. Gruen, D. Amon, A. Roodman, A. Masters, D. Raichoor, A. Schlegel, D. Canning, R. Castander, F. J. DeRose, J. Miquel, R. Myles, J. Newman, J. A. Slosar, A. Speagle, J. Wilson, M. J. Aguilar, J. Ahlen, S. Bailey, S. Brooks, D. Claybaugh, T. Cole, S. Dawson, K. de la Macorra, A. Doel, P. Forero-Romero, J. E. Gontcho, S. Gontcho A Guy, J. Kehoe, R. Kremin, A. Landriau, M. Guillou, L. Le Levi, M. Manera, M. Martini, P. Meisner, A. Moustakas, J. Nie, J. Percival, W. J. Poppett, C. Prada, F. Rezaie, M. Rossi, G. Sanchez, E. Seo, H. Tarlé, G. Weaver, B. A. Zhou, Z. Zou, H. Cosmology and Nongalactic Astrophysics We present initial results from the Dark Energy Spectroscopic Instrument (DESI) Complete Calibration of the Color-Redshift Relation (DC3R2) secondary target survey. Our analysis uses 230k galaxies that overlap with KiDS-VIKING $ugriZYJHK_s$ photometry to calibrate the color-redshift relation and to inform photometric redshift (photo-z) inference methods of future weak lensing surveys. Together with Emission Line Galaxies (ELGs), Luminous Red Galaxies (LRGs), and the Bright Galaxy Survey (BGS) that provide samples of complementary color, the DC3R2 targets help DESI to span 56% of the color space visible to Euclid and LSST with high confidence spectroscopic redshifts. The effects of spectroscopic completeness and quality are explored, as well as systematic uncertainties introduced with the use of common Self Organizing Maps trained on different photometry than the analysis sample. We further examine the dependence of redshift on magnitude at fixed color, important for the use of bright galaxy spectra to calibrate redshifts in a fainter photometric galaxy sample. We find that noise in the KiDS-VIKING photometry introduces a dominant, apparent magnitude dependence of redshift at fixed color, which indicates a need for carefully chosen deep drilling fields, and survey simulation to model this effect for future weak lensing surveys.
title	DESI Complete Calibration of the Color-Redshift Relation (DC3R2): Results from early DESI data
topic	Cosmology and Nongalactic Astrophysics
url	https://arxiv.org/abs/2309.13109