ESASky Legacy TAP: EU-funded Projects - ESDC
ESASky Legacy TAP: EU-funded Projects
ESASky legacy is a TAP (Table Access Protocol) service to provide the community access to complete, self-standing catalogues and data collections from ESA astronomy legacy missions, ensuring their long-term preservation. This service, which is an IVOA standard for most modern science archives, is an entry point to data products and their successors that can be exposed by ESASky.
The European Commission Research Executive Agency) (H2020 and FP7) projects available in the ESASky legacy TAP are:
Herschel Extragalactic Legacy Project (HELP):
The Herschel Extragalactic Legacy Project ([HELP] http://www.herschel.sussex.ac.uk) is a European Commission Research Executive Agency funded programme specifically targeted to analysing the far infrared extragalactic observations made with the ESA Observatory Herschel. This project collates, curates, homogenises, and creates derived data products for most of the premium multi-wavelength extragalactic data sets. The sky boundaries for the first data release (DR1) 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), Herschel Guaranteed and Open Time Key Programmes, respectively.
The 23 HELP fields are described in the following table:
Records Main Catalogue
SED fit objects
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. The most relevant highly processed data products from HELP have been included as part of the ESASky TAP-based Legacy Archive, namely the catalogues with a total of 172 million photometric measurements from optical to far-infrared (herschelhelp_XXX) with a master table (herschelhelp) that includes the links and datalinks to the best fit SEDs provided by the CIGALE tool, the global catalogue of blind sources from Matched Filtered (MF) SPIRE maps (spire_blind_matched), and the HiPS SPIRE RGB map that may be inspected via ESASky linked via the url http://skies.esac.esa.int/Herschel/help_spire_rgb/.
Shirley et al. 2021 is the publication that presents the Herschel Extragalactic Legacy Project (HELP) Data Release 1 (DR1) and details the pipelines and methods used to tackle the challenges of complexity and volume size inherent to collating large, deep heterogeneous survey data.
HELP is designed to create a framework for wide-area multi-wavelength studies that can be continuously updated with new observations. The scope for Data Release 1, DR1, is to curate object catalogues and photometry at near-IR and optical wavelengths that have been provided by the survey teams from images at mid to far-IR wavelengths alongside spectroscopic redshifts. To that extent, HELP has various example Jupyter Notebooks that may be adapted to learn about the exploitation of these data sets in combination with other ESASky data sets.