HELP: the Herschel Extragalactic Legacy Project
We present the Herschel Extragalactic Legacy Project (HELP). This project collates, curates, homogenizes, and creates derived data products for most of the premium multiwavelength extragalactic data sets. The sky boundaries for the first data release cover 1270 deg2 defined by the Herschel SPIRE ext...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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Oxford University Press
2021
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| _version_ | 1797107601065902080 |
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| author | Shirley, R Duncan, K Campos Varillas, MC Hurley, PD Malek, K Roehlly, Y Smith, MWL Aussel, H Bakx, T Buat, V Burgarella, D Christopher, N Duivenvoorden, S Eales, S Efstathiou, A Gonzalez Solares, EA Griffin, M Jarvis, M Lo Faro, B Marchetti, L McCheyne, I Papadopoulos, A Penner, K Pons, E Prescott, M Rigby, E Rottgering, H Saxena, A Scudder, J Vaccari, M Wang, L Oliver, SJ |
| author_facet | Shirley, R Duncan, K Campos Varillas, MC Hurley, PD Malek, K Roehlly, Y Smith, MWL Aussel, H Bakx, T Buat, V Burgarella, D Christopher, N Duivenvoorden, S Eales, S Efstathiou, A Gonzalez Solares, EA Griffin, M Jarvis, M Lo Faro, B Marchetti, L McCheyne, I Papadopoulos, A Penner, K Pons, E Prescott, M Rigby, E Rottgering, H Saxena, A Scudder, J Vaccari, M Wang, L Oliver, SJ |
| author_sort | Shirley, R |
| collection | OXFORD |
| description | We present the Herschel Extragalactic Legacy Project (HELP). This project collates, curates, homogenizes, and creates derived data products for most of the premium multiwavelength extragalactic data sets. The sky boundaries for the first data release cover 1270 deg2 defined by the Herschel SPIRE extragalactic survey fields; notably the Herschel Multi-tiered Extragalactic Survey (HerMES) and the Herschel Atlas survey (H-ATLAS). Here, we describe the motivation and principal elements in the design of the project. Guiding principles are transparent or 'open' methodologies with care for reproducibility and identification of provenance. A key element of the design focuses around the homogenization of calibration, meta data, and the provision of information required to define the selection of the data for statistical analysis. We apply probabilistic methods that extract information directly from the images at long wavelengths, exploiting the prior information available at shorter wavelengths and providing full posterior distributions rather than maximum-likelihood estimates and associated uncertainties as in traditional catalogues. With this project definition paper, we provide full access to the first data release of HELP; Data Release 1 (DR1), including a monolithic map of the largest SPIRE extragalactic field at 385 deg2 and 18 million measurements of PACS and SPIRE fluxes. We also provide tools to access and analyse the full HELP data base. This new data set includes far-infrared photometry, photometric redshifts, and derived physical properties estimated from modelling the spectral energy distributions over the full HELP sky. All the software and data presented is publicly available. |
| first_indexed | 2024-03-07T07:18:18Z |
| format | Journal article |
| id | oxford-uuid:5ec905e1-8e6c-4d72-81be-828db73bb349 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:18:18Z |
| publishDate | 2021 |
| publisher | Oxford University Press |
| record_format | dspace |
| spelling | oxford-uuid:5ec905e1-8e6c-4d72-81be-828db73bb3492022-09-07T10:09:18ZHELP: the Herschel Extragalactic Legacy ProjectJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:5ec905e1-8e6c-4d72-81be-828db73bb349EnglishSymplectic ElementsOxford University Press2021Shirley, RDuncan, KCampos Varillas, MCHurley, PDMalek, KRoehlly, YSmith, MWLAussel, HBakx, TBuat, VBurgarella, DChristopher, NDuivenvoorden, SEales, SEfstathiou, AGonzalez Solares, EAGriffin, MJarvis, MLo Faro, BMarchetti, LMcCheyne, IPapadopoulos, APenner, KPons, EPrescott, MRigby, ERottgering, HSaxena, AScudder, JVaccari, MWang, LOliver, SJWe present the Herschel Extragalactic Legacy Project (HELP). This project collates, curates, homogenizes, and creates derived data products for most of the premium multiwavelength extragalactic data sets. The sky boundaries for the first data release cover 1270 deg2 defined by the Herschel SPIRE extragalactic survey fields; notably the Herschel Multi-tiered Extragalactic Survey (HerMES) and the Herschel Atlas survey (H-ATLAS). Here, we describe the motivation and principal elements in the design of the project. Guiding principles are transparent or 'open' methodologies with care for reproducibility and identification of provenance. A key element of the design focuses around the homogenization of calibration, meta data, and the provision of information required to define the selection of the data for statistical analysis. We apply probabilistic methods that extract information directly from the images at long wavelengths, exploiting the prior information available at shorter wavelengths and providing full posterior distributions rather than maximum-likelihood estimates and associated uncertainties as in traditional catalogues. With this project definition paper, we provide full access to the first data release of HELP; Data Release 1 (DR1), including a monolithic map of the largest SPIRE extragalactic field at 385 deg2 and 18 million measurements of PACS and SPIRE fluxes. We also provide tools to access and analyse the full HELP data base. This new data set includes far-infrared photometry, photometric redshifts, and derived physical properties estimated from modelling the spectral energy distributions over the full HELP sky. All the software and data presented is publicly available. |
| spellingShingle | Shirley, R Duncan, K Campos Varillas, MC Hurley, PD Malek, K Roehlly, Y Smith, MWL Aussel, H Bakx, T Buat, V Burgarella, D Christopher, N Duivenvoorden, S Eales, S Efstathiou, A Gonzalez Solares, EA Griffin, M Jarvis, M Lo Faro, B Marchetti, L McCheyne, I Papadopoulos, A Penner, K Pons, E Prescott, M Rigby, E Rottgering, H Saxena, A Scudder, J Vaccari, M Wang, L Oliver, SJ HELP: the Herschel Extragalactic Legacy Project |
| title | HELP: the Herschel Extragalactic Legacy Project |
| title_full | HELP: the Herschel Extragalactic Legacy Project |
| title_fullStr | HELP: the Herschel Extragalactic Legacy Project |
| title_full_unstemmed | HELP: the Herschel Extragalactic Legacy Project |
| title_short | HELP: the Herschel Extragalactic Legacy Project |
| title_sort | help the herschel extragalactic legacy project |
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