Toward a Spanish SKA Regional Centre fully engaged with open science

Garrido, Julián; Darriba, L.; Sánchez–Expósito, S.; Parra-Royon, Manuel; Moldón, J.; Mendoza, María Á.; Sebastian, Luna-Valero,; Alberdi, A.; Márquez, I.; Verdes–Montenegro, L.

doi:10.1117/1.jatis.8.1.011004

Cited by 4 publications

(1 citation statement)

References 23 publications

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“…Discussions about the precise roles of the SRCs are still ongoing but the SKAO has always had a very strong commitment toward implementing Open Science (Garrido et al, 2021 ):…”

Section: The Ska Project In Africamentioning

confidence: 99%

Open science and Big Data in South Africa

Hey

2022

Front. Res. Metr. Anal.

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With the Square Kilometer Array (SKA) project and the new Multi-Purpose Reactor (MPR) soon coming on-line, South Africa and other collaborating countries in Africa will need to make the management, analysis, publication, and curation of “Big Scientific Data” a priority. In addition, the recent draft Open Science policy from the South African Department of Science and Innovation (DSI) requires both Open Access to scholarly publications and research outputs, and an Open Data policy that facilitates equal opportunity of access to research data. The policy also endorses the deposit, discovery and dissemination of data and metadata in a manner consistent with the FAIR principles – making data Findable, Accessible, Interoperable and Re-usable (FAIR). The challenge to achieve Open Science in Africa starts with open access for research publications and the provision of persistent links to the supporting data. With the deluge of research data expected from the new experimental facilities in South Africa, the problem of how to make such data FAIR takes center stage. One promising approach to make such scientific datasets more “Findable” and “Interoperable” is to rely on the Dataset representation of the Schema.org vocabulary which has been endorsed by all the major search engines. The approach adds some semantic markup to Web pages and makes scientific datasets more “Findable” by search engines. This paper does not address all aspects of the Open Science agenda but instead is focused on the management and analysis challenges of the “Big Scientific Data” that will be produced by the SKA project. The paper summarizes the role of the SKA Regional Centers (SRCs) and then discusses the goal of ensuring reproducibility for the SKA data products. Experiments at the new MPR neutron source will also have to conform to the DSI's Open Science policy. The Open Science and FAIR data practices used at the ISIS Neutron source at the Rutherford Appleton Laboratory in the UK are then briefly described. The paper concludes with some remarks about the important role of interdisciplinary teams of research software engineers, data engineers and research librarians in research data management.

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“…Discussions about the precise roles of the SRCs are still ongoing but the SKAO has always had a very strong commitment toward implementing Open Science (Garrido et al, 2021 ):…”

Section: The Ska Project In Africamentioning

confidence: 99%

Open science and Big Data in South Africa

Hey

2022

Front. Res. Metr. Anal.

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SKA Science Data Challenge 2: analysis and results

Hartley

Braun

et al. 2023

Monthly Notices of the Royal Astronomical Society

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The Square Kilometre Array Observatory (SKAO) will explore the radio sky to new depths in order to conduct transformational science. SKAO data products made available to astronomers will be correspondingly large and complex, requiring the application of advanced analysis techniques to extract key science findings. To this end, SKAO is conducting a series of Science Data Challenges, each designed to familiarise the scientific community with SKAO data and to drive the development of new analysis techniques. We present the results from Science Data Challenge 2 (SDC2), which invited participants to find and characterise 233245 neutral hydrogen (H i) sources in a simulated data product representing a 2000 h SKA-Mid spectral line observation from redshifts 0.25 to 0.5. Through the generous support of eight international supercomputing facilities, participants were able to undertake the Challenge using dedicated computational resources. Alongside the main challenge, ‘reproducibility awards’ were made in recognition of those pipelines which demonstrated Open Science best practice. The Challenge saw over 100 participants develop a range of new and existing techniques, with results that highlight the strengths of multidisciplinary and collaborative effort. The winning strategy – which combined predictions from two independent machine learning techniques to yield a 20 per cent improvement in overall performance – underscores one of the main Challenge outcomes: that of method complementarity. It is likely that the combination of methods in a so-called ensemble approach will be key to exploiting very large astronomical datasets.

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The AMIGA sample of isolated galaxies – effects of environment on angular momentum

Sorgho,

Verdes-Montenegro,

Hess

et al. 2024

Monthly Notices of the Royal Astronomical Society

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We investigate the relationship between the baryonic angular momentum and mass for a sample of 36 isolated disc galaxies with resolved H i kinematics and infrared WISE photometry drawn from – and representative in terms of morphologies, stellar masses and H i-to-star fraction of – the carefully-constructed AMIGA sample of isolated galaxies. Similarly to previous studies performed on non-isolated galaxies, we find that the relation is well described by a power law $j_{\rm bar} \propto M_{\rm bar}^\alpha$. We also find a slope of α = 0.54 ± 0.08 for the AMIGA galaxies, in line with previous studies in the literature; however, we find that the specific angular momenta of the AMIGA galaxies are on average higher than those of non-isolated galaxies in the literature. This is consistent with theories stipulating that environmental processes involving galaxy-galaxy interaction are able to impact the angular momentum content of galaxies. However, no correlation was found between the angular momentum and the degree of isolation, suggesting that there may exist a threshold local number density beyond which the effects of the environment on the angular momentum become important.

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Toward a Spanish SKA Regional Centre fully engaged with open science

Cited by 4 publications

References 23 publications

Open science and Big Data in South Africa

Open science and Big Data in South Africa

SKA Science Data Challenge 2: analysis and results

The AMIGA sample of isolated galaxies – effects of environment on angular momentum

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