Science Users Information

These pages are aimed at ESO community astronomers and contain all the information required in order to prepare, execute, process and exploit observations with ESO facilities. They also provide information on the scientific activities taking place at ESO. Details can be accessed via the navigation menu.


ESO Science Announcements

New Data from the Kilo-Degree Survey: KiDS Data Release 5

Published: 21 Mar 2025

KiDS is an ESO Public Survey carried out with the VLT Survey Telescope and OmegaCAM camera, that has imaged 1347 square degrees in four filters (u, g, r, i). Single epoch observations are provided in u,g,r. Multi-epoch imaging is provided in the i-band, with the two observations, denoted i1 and i2, typically separated by several years. KiDS was designed as a weak lensing tomography survey, with a core science driver to map and constrain the properties of the evolving large-scale matter distribution in the Universe. The median r-band 5σ limiting magnitude is 24.8 with median seeing 0.7”. Additional science cases are manifold, ranging from galaxy evolution to Milky Way structure, and from the detection of white dwarfs to high-redshift quasars.

Release of VST/OMEGACAM Imaging Products from the Collaboration with INAF

Published: 21 Mar 2025

The VLT Survey Telescope (VST) at Paranal is now owned and managed by INAF which processes the data and releases them via the ESO Archive. The imaging data included in this DR1 are obtained using the wide-field camera OmegaCAM in the filters: u, g, r, i, z, H_α. They span a wide range of celestial objects, from distant galaxy clusters to nearby galaxies and star clusters.

Status Update on "The ALMA 2030 Wideband Sensitivity Upgrade" at the Upcoming EAS 2025 Meeting

Published: 21 Mar 2025

Lunch session LS6 on "The ALMA 2030 Wideband Sensitivity Upgrade: status update" will take place on the 26th of June, during the European Astronomical Society (EAS) 2025 annual meeting in Cork (Ireland). The ALMA Wideband Sensitivity Upgrade (WSU for short) constitutes the top priority of the ALMA 2030 development roadmap.

Proposals for ESO 2026 Workshops

Published: 11 Mar 2025

In its efforts to promote the scientific exchange among astronomers, the Directorate for Science at ESO continues to provide support and funding for the organisation of scientific workshops in Santiago and in Garching as well as co-funding for some external workshops. Science workshops are an essential component of ESO's programmes and represent a unique opportunity to promote and foster ideas and collaborations within the scientific community.

2025 Users Committee Meeting

Published: 24 Feb 2025

The Users Committee (UC) represents ESO's astronomical community at large and acts as an advisory body to the ESO Director General on matters related to the performance, scientific access, operation and data management facilities to the La Silla Paranal Observatory and ALMA. The annual meeting of the UC is scheduled on 28 and 29 April 2025. During the UC meeting updates from ESO and feedback from the user community are exchanged and openly discussed. Each year one topic is explored in more detail and this year the Special Topic session is dedicated to Quality Assurance and Data Quality.

The Messenger

The Messenger 193 is now available. Highlights include:

  • Bonaldi, A., Zwaan, M. et al.: SKAO, SKA Precursors/pathfinders and ESO Facilities
  • Breen, S., Schödel, R. et al.: ESO–SKAO Coordinated Surveys: the Galaxy
  • Prandoni, I., Sargent, M. et al.: An ESO–SKAO Synergistic Approach to Galaxy Formation and Evolution Studies
  • Santos, M., Camera, S. et al.: Cosmology with ESO–SKAO Synergies
  • Mesinger, A., Ciardi, B. et al.: ESO–SKAO Synergies for the Epoch of Reionisation and Cosmic Dawn
  • Patat, F., Leibundgut, B. et al.: Yearly Call and Fast Track Channel at ESO

The ESO Science Newsletter

The February 2025 issue is now available.

The ESO Science Newsletter, mailed approximately once per month, presents the most recent announcements. Subscription is controlled through the Manage Profile link on the User Portal. Back issues (2013-) are archived.


Citing ESO data in research papers

Researchers are kindly asked to indicate the identifiers (programme IDs or Data DOIs) of the (new or archival) observations they used in their papers as explained in ESO’s data citation policy. This enables the telbib curators to cross-link research output to make data Findabie, Accessible, Interoperable, and Reusable as suggested by the FAIR Principles.  


Pitch Your Research to ESO COMM

Are you an author on an upcoming scientific study based on ESO data that could be relevant to journalists or the wider public? Or are you a Principal Investigator on ESO observations with potential to become stunning images? If so, please consider sending to ESO your paper and/or a preview of the image(s) obtained with ESO telescopes.