Data Release scenario

On this webpage, the target release scenario is presented, based on the current status of processing. A firmer release schedule will be issued when a definite date for the first intermediate Gaia data release has been decided.

Photometric science alerts are already being issued and the plan is to release new asteroid notifications in the not too distant future.

In general, individual epoch observations and transits will be released only with the final catalogue. However, when variable star solutions, etc. are released, relevant subsets of epoch data may also be released. Additionally, where the release of epoch data is of immediate scientific interest, such release will be made on an individual source-by-source basis through the science alerts.

After production of the catalogue for release, a validation exercise will be executed. The final, detailed release contents will be decided on only after completion of the validation work.

Warning: dense fields will not be fully populated in early releases, especially for stars fainter than ~15th magnitude.

 

First release: end of summer 2016  

 

Subject to successful validation, the catalogue will be consisting of:

 
Second release: second half of 2017  

 

Potentially, the catalogue will be consisting of:

  • Five-parameter astrometric solutions of objects with single-star behaviour will be released under the assumption that at least 90% of the sky can be covered.
  • Integrated BP/RP photometry, with appropriate standard errors for sources where basic astrophysical parameter estimation has been verified (these parameters will also be released).
  • Mean radial velocities will be released for objects showing no radial-velocity variation and for which an adequate synthetic template could be selected, under the assumption that this can be done for 90% of the bright stars on the sky.
 
Third release: summer 2018 (TBC)  

 

Potentially, the catalogue will be consisting of:

  • Orbital solutions, together with the system radial velocity and five-parameter astrometric solutions, for binaries having periods between 2 months and 75% of the observing time will be released.
  • Object classification and astrophysical parameters, together with BP/RP spectra and/or RVS spectra they are based on, will be released for spectroscopically and (spectro-)photometrically well-behaved objects.
  • Mean radial velocities will be released for those stars not showing variability and with available atmospheric-parameter estimates.
 
Fourth release: summer 2019 (TBC)  

 

Potentially, the catalogue will be consisting of:

  • Variable-star classifications will be released together with the epoch photometry used for the stars.
  • Solar-system results will be released with preliminary orbital solutions and individual epoch observations.
  • Non-single star catalogues will be released.
 
Final release: 2022 (TBC)  

 

The catalogue will be consisting of:

  • Full astrometric, photometric, and radial-velocity catalogues.
  • All available variable-star and non-single-star solutions.
  • Source classifications (probabilities) plus multiple astrophysical parameters (derived from BP/RP, RVS, and astrometry) for stars, unresolved binaries, galaxies, and quasars. Some parameters may not be available for faint(er) stars.
  • An exo-planet list.
  • All epoch and transit data for all sources.
  • All ground-based observations made for data-processing purposes.