OzDES multifibre spectroscopy for the Dark Energy Survey : 3-yr results and first data release
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/178295 |
Resumo: | We present results for the first three years of OzDES, a six year programme to obtain redshifts for objects in the Dark Energy Survey (DES) supernova fields using the 2dF fibre positioner and AAOmega spectrograph on the Anglo-Australian Telescope. OzDES is a multi-object spectroscopic survey targeting multiple types of targets at multiple epochs over a multiyear baseline and is one of the first multi-object spectroscopic surveys to dynamically include transients into the target list soon after their discovery. At the end of three years, OzDES has spectroscopically confirmed almost 100 supernovae, and has measured redshifts for 17 000 objects, including the redshifts of 2566 supernova hosts. We examine how our ability to measure redshifts for targets of various types depends on signal-to-noise ratio (S/N), magnitude and exposure time, finding that our redshift success rate increases significantly at a S/N of 2–3 per 1-Å bin. We also find that the change in S/N with exposure time closely matches the Poisson limit for stacked exposures as long as 10 h. We use these results to predict the redshift yield of the full OzDES survey, as well as the potential yields of future surveys on other facilities such as (i.e. the 4-m Multi-Object Spectroscopic Telescope, the Subaru Prime Focus Spectrograph and the Maunakea Spectroscopic Explorer). This work marks the first OzDES data release, comprising 14 693 redshifts. OzDES is on target to obtain over 30 000 redshifts over the 6-yr duration of the survey, including a yield of approximately 5700 supernova host-galaxy redshifts. |
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Childress, MichaelOstrovski, F.DES Collaboration2018-05-17T02:25:31Z20170035-8711http://hdl.handle.net/10183/178295001061007We present results for the first three years of OzDES, a six year programme to obtain redshifts for objects in the Dark Energy Survey (DES) supernova fields using the 2dF fibre positioner and AAOmega spectrograph on the Anglo-Australian Telescope. OzDES is a multi-object spectroscopic survey targeting multiple types of targets at multiple epochs over a multiyear baseline and is one of the first multi-object spectroscopic surveys to dynamically include transients into the target list soon after their discovery. At the end of three years, OzDES has spectroscopically confirmed almost 100 supernovae, and has measured redshifts for 17 000 objects, including the redshifts of 2566 supernova hosts. We examine how our ability to measure redshifts for targets of various types depends on signal-to-noise ratio (S/N), magnitude and exposure time, finding that our redshift success rate increases significantly at a S/N of 2–3 per 1-Å bin. We also find that the change in S/N with exposure time closely matches the Poisson limit for stacked exposures as long as 10 h. We use these results to predict the redshift yield of the full OzDES survey, as well as the potential yields of future surveys on other facilities such as (i.e. the 4-m Multi-Object Spectroscopic Telescope, the Subaru Prime Focus Spectrograph and the Maunakea Spectroscopic Explorer). This work marks the first OzDES data release, comprising 14 693 redshifts. OzDES is on target to obtain over 30 000 redshifts over the 6-yr duration of the survey, including a yield of approximately 5700 supernova host-galaxy redshifts.application/pdfengMonthly notices of the Royal Astronomical Society. Oxford. Vol. 472, no. 1 (Nov. 2017), p. 273–288Deslocamento para o vermelhoEnergia escuraSupernovaSupernovae: generalDark energyOzDES multifibre spectroscopy for the Dark Energy Survey : 3-yr results and first data releaseEstrangeiroinfo: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:UFRGSORIGINAL001061007.pdf001061007.pdfTexto completo (inglês)application/pdf1004309http://www.lume.ufrgs.br/bitstream/10183/178295/1/001061007.pdf2e840e6db2699b07ba761f2bba95b947MD51TEXT001061007.pdf.txt001061007.pdf.txtExtracted Texttext/plain80855http://www.lume.ufrgs.br/bitstream/10183/178295/2/001061007.pdf.txt8924488645b055bd2e231e336af3057eMD5210183/1782952019-05-24 02:36:21.24379oai:www.lume.ufrgs.br:10183/178295Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2019-05-24T05:36:21Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
OzDES multifibre spectroscopy for the Dark Energy Survey : 3-yr results and first data release |
title |
OzDES multifibre spectroscopy for the Dark Energy Survey : 3-yr results and first data release |
spellingShingle |
OzDES multifibre spectroscopy for the Dark Energy Survey : 3-yr results and first data release Childress, Michael Deslocamento para o vermelho Energia escura Supernova Supernovae: general Dark energy |
title_short |
OzDES multifibre spectroscopy for the Dark Energy Survey : 3-yr results and first data release |
title_full |
OzDES multifibre spectroscopy for the Dark Energy Survey : 3-yr results and first data release |
title_fullStr |
OzDES multifibre spectroscopy for the Dark Energy Survey : 3-yr results and first data release |
title_full_unstemmed |
OzDES multifibre spectroscopy for the Dark Energy Survey : 3-yr results and first data release |
title_sort |
OzDES multifibre spectroscopy for the Dark Energy Survey : 3-yr results and first data release |
author |
Childress, Michael |
author_facet |
Childress, Michael Ostrovski, F. DES Collaboration |
author_role |
author |
author2 |
Ostrovski, F. DES Collaboration |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Childress, Michael Ostrovski, F. DES Collaboration |
dc.subject.por.fl_str_mv |
Deslocamento para o vermelho Energia escura Supernova |
topic |
Deslocamento para o vermelho Energia escura Supernova Supernovae: general Dark energy |
dc.subject.eng.fl_str_mv |
Supernovae: general Dark energy |
description |
We present results for the first three years of OzDES, a six year programme to obtain redshifts for objects in the Dark Energy Survey (DES) supernova fields using the 2dF fibre positioner and AAOmega spectrograph on the Anglo-Australian Telescope. OzDES is a multi-object spectroscopic survey targeting multiple types of targets at multiple epochs over a multiyear baseline and is one of the first multi-object spectroscopic surveys to dynamically include transients into the target list soon after their discovery. At the end of three years, OzDES has spectroscopically confirmed almost 100 supernovae, and has measured redshifts for 17 000 objects, including the redshifts of 2566 supernova hosts. We examine how our ability to measure redshifts for targets of various types depends on signal-to-noise ratio (S/N), magnitude and exposure time, finding that our redshift success rate increases significantly at a S/N of 2–3 per 1-Å bin. We also find that the change in S/N with exposure time closely matches the Poisson limit for stacked exposures as long as 10 h. We use these results to predict the redshift yield of the full OzDES survey, as well as the potential yields of future surveys on other facilities such as (i.e. the 4-m Multi-Object Spectroscopic Telescope, the Subaru Prime Focus Spectrograph and the Maunakea Spectroscopic Explorer). This work marks the first OzDES data release, comprising 14 693 redshifts. OzDES is on target to obtain over 30 000 redshifts over the 6-yr duration of the survey, including a yield of approximately 5700 supernova host-galaxy redshifts. |
publishDate |
2017 |
dc.date.issued.fl_str_mv |
2017 |
dc.date.accessioned.fl_str_mv |
2018-05-17T02:25:31Z |
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Estrangeiro info:eu-repo/semantics/article |
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http://hdl.handle.net/10183/178295 |
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0035-8711 |
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001061007 |
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http://hdl.handle.net/10183/178295 |
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eng |
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dc.relation.ispartof.pt_BR.fl_str_mv |
Monthly notices of the Royal Astronomical Society. Oxford. Vol. 472, no. 1 (Nov. 2017), p. 273–288 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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