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Cern releases experimental data through Open Data Portal

Cern has announced the launch of its Open Data Portal, where data from real collision events, produced by the LHC experiments will be made publicly availablec. The organisation has also released open-source software to read and analyse the data that has been made available.

CERN Director General Rolf Heuer said: ‘Launching the CERN Open Data Portal is an important step for our organisation. Data from the LHC programme are among the most precious assets of the LHC experiments, that today we start sharing openly with the world. We hope these open data will support and inspire the global research community, including students and citizen scientists.’

Cern have published all LHC publications through Open Access, widening the scope, the LHC collaborations recently approved open data policies and will release collision data over the coming years. The CERN Open Data Portal is built on the open-source Invenio Digital Library software, which powers other CERN Open Science tools and initiatives.

The first high-level and analysable collision data openly released come from the CMS experiment and were originally collected in 2010 during the first LHC run. This data set has now been made publicly available on the CERN Open Data Portal. The CMS collaboration is committed to releasing its data three years after collection, after they have been thoroughly studied by the collaboration.

CMS data preservation coordinator Kati Lassila-Perini said: ‘This is all new and we are curious to see how the data will be re-used. We’ve prepared tools and examples of different levels of complexity from simplified analysis to ready-to-use online applications. We hope these examples will stimulate the creativity of external users.’

In parallel, the CERN Open Data Portal gives access to additional event data sets from the ALICE, ATLAS, CMS and LHCb collaborations, which have been specifically prepared for educational purposes, such as the international masterclasses in particle physics benefiting over ten thousand high-school students every year.

Silvia Amerio, data preservation coordinator of the LHCb experiment said: ‘Our own data policy foresees data preservation and its sharing. We have seen that students are fascinated by being able to analyse LHC data in the past and so, we are very happy to take the first steps and make available some selected data for education.’

All data on is shared under a Creative Commons CC0 public domain dedication; data and software are assigned unique DOI identifiers to make them citable in scientific articles; and software is released under open source licenses.

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