During the European week of Astronomy 2020 the ESO Archive Science Group presented the new possibilities of the ESO archive in two contributed talks as part of the session SS18a - Scientific use of the spectroscopic archive in the long-term future. The videos of the two talks will be available online on the conference web-site until the end of July 2020 (search for Laura Mascetti and Emanuele Paolo Farina), but you will be able to find the presentations in pdf format here:
The ESO archive is a powerful scientific resource for the astronomical community. It stores more than forty years of raw data generated by all ESO instruments, as well as the corresponding science-ready products and catalogues. Spectroscopic products from surveys and instruments like MUSE, UVES, XSHOOTER, FLAMES/GIRAFFE, HARPS and FEROS are regularly ingested and published. All spectra are stored in an homogeneous, VO-compliant format defined in the Phase 3 standard and are released together with an extended documentation, their release description. The aim of this presentation is to show how an homogeneous and well characterized archive content allows to build enhance functionalities for data discovery and exploitation. I will conclude presenting how the ESO archive is coping with the relentlessly increase in volume and complexity of the archive holdings, focusing on the handling of data from the new multi-object spectrograph 4MOST.
The ESO Archive currently contains half a million images, two millions spectra and more than ten thousands datacubes. This incredible dataset is publicly available for data mining for a variety of scientific purposes, ranging from the local Universe to the first object emerging from the cosmic dark ages.
As an example, by selecting a sub-sample of high quality spectra collected with both MUSE and XSHOOTER, I will show how combining information coming from different instruments can shed new light on the properties of well known objects such as spectro-photometric standard stars.
In the near future, this approach would be fundamental to cross-validate the tens of millions of spectra foreseen to be collected with the 4MOST instrument on the ESO/VISTA telescope
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