Assessing the photometric redshift precision of the S-PLUS survey : the Stripe-82 as a test-case
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/220858 |
Resumo: | In this paper we present a thorough discussion about the photometric redshift (photo-z) performance of the Southern Photometric Local Universe Survey (S-PLUS). This survey combines a seven narrow +5 broad passband filter system, with a typical photometric-depth of r ∼ 21 AB. For this exercise, we utilize the Data Release 1 (DR1), corresponding to 336 deg2 from the Stripe-82 region. We rely on the BPZ2 code to compute our estimates, using a new library of SED models, which includes additional templates for quiescent galaxies. When compared to a spectroscopic redshift control sample of ∼100 k galaxies, we find a precision of σz <0.8 per cent, <2.0 per cent, or <3.0 per cent for galaxies with magnitudes r < 17, <19, and <21, respectively. A precision of 0.6 per cent is attained for galaxies with the highest Odds values. These estimates have a negligible bias and a fraction of catastrophic outliers inferior to 1 per cent. We identify a redshift window (i.e. 0.26 <z< 0.32) where our estimates double their precision, due to the simultaneous detection of two emission lines in two distinct narrow bands; representing a window opportunity to conduct statistical studies such as luminosity functions. We forecast a total of ∼2 M, ∼16 M and ∼32 M galaxies in the S-PLUS survey with a photo-z precision of σz <1.0 per cent, <2.0 per cent, and <2.5 per cent after observing 8000 deg2. We also derive redshift probability density functions, proving their reliability encoding redshift uncertainties and their potential recovering the n(z) of galaxies at z < 0.4, with an unprecedented precision for a photometric survey in the Southern hemisphere |
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Molino, AlbertoSchoenell, WilliamChies-Santos, Ana LeonorAbramo, L. Raul2021-05-13T04:27:02Z20200035-8711http://hdl.handle.net/10183/220858001122990In this paper we present a thorough discussion about the photometric redshift (photo-z) performance of the Southern Photometric Local Universe Survey (S-PLUS). This survey combines a seven narrow +5 broad passband filter system, with a typical photometric-depth of r ∼ 21 AB. For this exercise, we utilize the Data Release 1 (DR1), corresponding to 336 deg2 from the Stripe-82 region. We rely on the BPZ2 code to compute our estimates, using a new library of SED models, which includes additional templates for quiescent galaxies. When compared to a spectroscopic redshift control sample of ∼100 k galaxies, we find a precision of σz <0.8 per cent, <2.0 per cent, or <3.0 per cent for galaxies with magnitudes r < 17, <19, and <21, respectively. A precision of 0.6 per cent is attained for galaxies with the highest Odds values. These estimates have a negligible bias and a fraction of catastrophic outliers inferior to 1 per cent. We identify a redshift window (i.e. 0.26 <z< 0.32) where our estimates double their precision, due to the simultaneous detection of two emission lines in two distinct narrow bands; representing a window opportunity to conduct statistical studies such as luminosity functions. We forecast a total of ∼2 M, ∼16 M and ∼32 M galaxies in the S-PLUS survey with a photo-z precision of σz <1.0 per cent, <2.0 per cent, and <2.5 per cent after observing 8000 deg2. We also derive redshift probability density functions, proving their reliability encoding redshift uncertainties and their potential recovering the n(z) of galaxies at z < 0.4, with an unprecedented precision for a photometric survey in the Southern hemisphereapplication/pdfengMonthly notices of the royal astronomical society. Oxford. Vol. 499, no. 3 (Dec. 2020), p. 3884-3908Aglomerados de galaxiasDeslocamento para o vermelhoFotometria astronômicaSurveysGalaxies: clusters : generalGalaxies: distances and redshiftsCosmology: large-scale structure of UniverseTechniques: photometricAssessing the photometric redshift precision of the S-PLUS survey : the Stripe-82 as a test-caseEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001122990.pdf.txt001122990.pdf.txtExtracted Texttext/plain132271http://www.lume.ufrgs.br/bitstream/10183/220858/2/001122990.pdf.txtbd36d2de907de2f3575bfe7b2278e8b9MD52ORIGINAL001122990.pdfTexto completo (inglês)application/pdf11714618http://www.lume.ufrgs.br/bitstream/10183/220858/1/001122990.pdf19c3dc800a6576a2f602e72b811f0a83MD5110183/2208582021-05-26 04:42:00.994945oai:www.lume.ufrgs.br:10183/220858Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2021-05-26T07:42Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Assessing the photometric redshift precision of the S-PLUS survey : the Stripe-82 as a test-case |
title |
Assessing the photometric redshift precision of the S-PLUS survey : the Stripe-82 as a test-case |
spellingShingle |
Assessing the photometric redshift precision of the S-PLUS survey : the Stripe-82 as a test-case Molino, Alberto Aglomerados de galaxias Deslocamento para o vermelho Fotometria astronômica Surveys Galaxies: clusters : general Galaxies: distances and redshifts Cosmology: large-scale structure of Universe Techniques: photometric |
title_short |
Assessing the photometric redshift precision of the S-PLUS survey : the Stripe-82 as a test-case |
title_full |
Assessing the photometric redshift precision of the S-PLUS survey : the Stripe-82 as a test-case |
title_fullStr |
Assessing the photometric redshift precision of the S-PLUS survey : the Stripe-82 as a test-case |
title_full_unstemmed |
Assessing the photometric redshift precision of the S-PLUS survey : the Stripe-82 as a test-case |
title_sort |
Assessing the photometric redshift precision of the S-PLUS survey : the Stripe-82 as a test-case |
author |
Molino, Alberto |
author_facet |
Molino, Alberto Schoenell, William Chies-Santos, Ana Leonor Abramo, L. Raul |
author_role |
author |
author2 |
Schoenell, William Chies-Santos, Ana Leonor Abramo, L. Raul |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Molino, Alberto Schoenell, William Chies-Santos, Ana Leonor Abramo, L. Raul |
dc.subject.por.fl_str_mv |
Aglomerados de galaxias Deslocamento para o vermelho Fotometria astronômica |
topic |
Aglomerados de galaxias Deslocamento para o vermelho Fotometria astronômica Surveys Galaxies: clusters : general Galaxies: distances and redshifts Cosmology: large-scale structure of Universe Techniques: photometric |
dc.subject.eng.fl_str_mv |
Surveys Galaxies: clusters : general Galaxies: distances and redshifts Cosmology: large-scale structure of Universe Techniques: photometric |
description |
In this paper we present a thorough discussion about the photometric redshift (photo-z) performance of the Southern Photometric Local Universe Survey (S-PLUS). This survey combines a seven narrow +5 broad passband filter system, with a typical photometric-depth of r ∼ 21 AB. For this exercise, we utilize the Data Release 1 (DR1), corresponding to 336 deg2 from the Stripe-82 region. We rely on the BPZ2 code to compute our estimates, using a new library of SED models, which includes additional templates for quiescent galaxies. When compared to a spectroscopic redshift control sample of ∼100 k galaxies, we find a precision of σz <0.8 per cent, <2.0 per cent, or <3.0 per cent for galaxies with magnitudes r < 17, <19, and <21, respectively. A precision of 0.6 per cent is attained for galaxies with the highest Odds values. These estimates have a negligible bias and a fraction of catastrophic outliers inferior to 1 per cent. We identify a redshift window (i.e. 0.26 <z< 0.32) where our estimates double their precision, due to the simultaneous detection of two emission lines in two distinct narrow bands; representing a window opportunity to conduct statistical studies such as luminosity functions. We forecast a total of ∼2 M, ∼16 M and ∼32 M galaxies in the S-PLUS survey with a photo-z precision of σz <1.0 per cent, <2.0 per cent, and <2.5 per cent after observing 8000 deg2. We also derive redshift probability density functions, proving their reliability encoding redshift uncertainties and their potential recovering the n(z) of galaxies at z < 0.4, with an unprecedented precision for a photometric survey in the Southern hemisphere |
publishDate |
2020 |
dc.date.issued.fl_str_mv |
2020 |
dc.date.accessioned.fl_str_mv |
2021-05-13T04:27:02Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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http://hdl.handle.net/10183/220858 |
dc.identifier.issn.pt_BR.fl_str_mv |
0035-8711 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001122990 |
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0035-8711 001122990 |
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http://hdl.handle.net/10183/220858 |
dc.language.iso.fl_str_mv |
eng |
language |
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dc.relation.ispartof.pt_BR.fl_str_mv |
Monthly notices of the royal astronomical society. Oxford. Vol. 499, no. 3 (Dec. 2020), p. 3884-3908 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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