Establishing the MAGIC data legacy: adopting standardised data formats and open-source analysis tools

The standardisation of gamma-ray astronomical data emerged in recent years as a necessity for the future generation of gamma-ray observatories. Nevertheless, adopting a common format for gamma-ray instruments can already benefit the current generation of gamma-ray instruments. As the end of their operations approaches, it provides a natural solution for the production of their data legacy. Additionally it eases data combination for multi-instrument analyses, thus enhancing the potential for scientific discovery with the wealth of data so far gathered. In this contribution, we present for the first time the effort to adapt the data of the MAGIC telescopes to the standardised format proposed by the Data Formats for Gamma-ray Astronomy initiative. We validate the data conversion by analysing the standardised data with the open-source software Gammapy and comparing the results obtained against those produced with the MAGIC proprietary software, MARS. For both samples chosen (Crab Nebula and Mrk421 observation), for all the scientific products extracted (spectra and light curves), we observe good agreement between the results of the two software.