Welcome to the ESO Science Archive Facility
The ESO Science Archive Facility contains data from ESO telescopes at La Silla Paranal Observatory, including the APEX submillimeter telescope on Llano de Chajnantor. In addition, the raw UKIDSS/WFCAM data obtained at the UK Infrared Telescope facility in Hawaii are available.
The Principal Investigators of successful proposals for time on ESO telescopes have exclusive access to their scientific data for the duration of a proprietary period, normally of one year, after which the data becomes available to the community at large. Please read the ESO Data Access Policy statement for more information, along with the relevant FAQs.
Browsing the archive does not require authentication, but to request and download data you have to log in to the ESO User Portal. Please acknowledge the use of archive data in any publication.
Latest News and Updates 
To browse the archive
Currently, raw data and various types of data products can be reached via different interfaces:
| Category | Query Forms | Data collection | Data Type | Instruments |
|---|---|---|---|---|
| LPO Raw Data | Raw data query form (all instruments) Instrument specific query forms Direct retrieval of raw data by file name |
All ESO raw data | Various | Many La Silla Paranal instruments |
| LPO Data Products | Phase 3 main query form Phase 3 imaging query form Phase 3 instrument specific query form |
Phase 3 Data Products (ESO Public Surveys) | Currently, Imaging | Currently, VISTA/VIRCAM |
| Catalogue Facility query interface | Phase 3 Catalogues [ESO User Portal authentication required also when browsing] | Catalogues | Currently, VISTA/VIRCAM | |
| Advanced Data Products query form | GOODS (C.Cesarsky) |
Imaging, Spectroscopy | FORS2/ISAAC/VIMOS | |
| zCOSMOS (S.Lilly) |
Spectroscopy | VIMOS | ||
| Observation of Corot astroseismologically-selected HD stars (E.Poretti) |
Spectroscopy (time series) | FEROS | ||
| UVES reprocessed | Spectroscopy | UVES | ||
| Time-domain survey of NGC 2547 (S.Aigrain) |
Imaging | FEROS | ||
| FEROS/HARPS pipeline processed data query form | FEROS/HARPS pipeline processed data | Spectroscopy | FEROS, HARPS | |
| Science Verification, Commissioning, EIS, etc. | Full list of available data packages | Various | Many | |
| APEX Quick Look Products | APEX query form | APEX | Heterodyne, Bolometer | APEX-2A, LABOCA, SABOCA, SHeFI |
| ALMA Data |
ALMA Science Archive | All ALMA data | Cube | ALMA |
The ESO Science Archive Facility was developed in partnership with the Space Telescope – European Coordinating Facility (ST-ECF). It was operated jointly until the closure of the ST-ECF in December 2010.