ARI's Gaia Services

All last new events (e.g. new feature, new data, bug correction) in the ARI's Gaia Services.

5th March 2021 Additional EDR3 crossmatches available
Additional crossmatches with EDR3 data have been added.

Additional crossmatches with EDR3 have been added, all of which are accessible through our  TAP service. The corresponding datasets are:

For more information on them you can check their composition in Data & Statistics

4th February 2021 Updates on EDR3 data
Additional EDR3 tables based on the existing data wil soon be provided.

In the next coming days, some updates made to the EDR3 data served in the ARI Gaia Archive will be publicly available in our  TAP service

Two new tables complementary to the EDR3 already available on ARI's Gaia Services will be added:

More columns from gaiaedr3.gaia_source have been indexed, so queries should run better provided you use those fields. On the other hand, the gaiaedr3.gaia_universe_model will finally not be available here due to disk space issues.

More information on the tables in Data & Statistics

3rd December 2020 Gaia EDR3 online!
The early third Gaia Data Release is now available on ARI's Gaia Services.

The Gaia EDR3 is now available on ARI's Gaia Services.

On this server you can get query and use the data of the Gaia early Data Release 3. As of 2020-12-03, 22 tables are queriable, as described in detail on  Data & statistics. The Gaia Universe Model table is not yet available on this mirror; it will be added over the christmas holidays.

At ARI, in addition to the interactive web page, three services are offered (of which two are useful for Virtual Observatory users):

As an extra, in order to support the Single Source service from Python, a small script has been developed, alongside a usage example.

16th October 2020 Improvements on single source visualisation
An error where the time series was not plotted was detected. An improved, albeit with an slightly different design, has been deployed.

An error where the time series failed to be plotted has been detected recently. A new, improved tool had been on the works on the background, using a slightly different design and improving some bugs like zooming and panning, has been deployed.

The tool is located in the Single Source Search page. It will plot one or many timeseries (depending on your searchcriteria) for sources which have them available. For more information on this, there is a news item below. If you want to know how the single source service works, please check FAQ ยง Single Source Search.

If you happen to find new bugs, please let me know by sending an email to

Update 2020-10-21:

Aladin visualisation has been faulty since the deployment of the new time series visualisation functionality. It has been now fixed.

web singlesource
8th January 2019 Re-normalised Unit Weight Error (RUWE) data added
The gaiadr2.gaia_source table from the second Gaia data release now contains the information relevant to the Re-normalised Unit Weight Error (RUWE).

The ARI Gaia DR2 has decided to add support to the weighted errors which give us information about the quality of the data.

The Re-normalised Unit Weight Error or RUWE is a normalisation of the chi-square distribution (or Unit Weight Error) as an statistical indicator of the quality of the data. However this UWE is highly dependant on magnitude and colour. Thus the normalisation works as an goodness-of-fit statistic. More on the RUWE on the technical note GAIA-C3-TN-LU-LL-124-01 (Re-normalising the astrometric chi-square in Gaia DR2) (Lindegren, L. 2018b).

We have added two new fields ruwe and low_ruwe which will be useful on TAP queries.


The RUWE information is now contained in a new table called gaiadr2.ruwe, same as the main ESA archive and other partner data centres. The field is still named ruwe. Our low_ruwe field is not supported anymore. You should update your code accordingly for future queries. For reference, an example which uses one of the fields can be accessed through the  TAP service.

For more information on this, please check Data & Statistics

25th April 2018 Gaia DR2 online!
The second Gaia Data Release is now available on ARI's Gaia Services.

The full Gaia DR2 is now available on ARI's Gaia Services.

On this website you can get all information about the content of this release. All of the 39 tables (16 main tables + 23 crossmatch tables) are described in details on  Data & Statistics. In addition of a detailed textual description, you will find statistics and sky-maps for all numerical columns of all available tables.

To query these data, the ARI provides three services:

27th February 2018 ADQL auto-completion
On the web interface of TAP, the ADQL editor has been enhanced with an auto-completion mechanism.

The ADQL editor on the Web interface of the TAP service of ARI has been enhanced with an auto-completion mechanism. It is able to automatically complete ADQL keywords, ADQL functions, schema/table/column names as well as additional functions (i.e. UDF = User Defined Functions) provided by ARI. You can trigger it with the common keys combination: Ctrl + Space.

13th December 2017 Online time-series visualization
It is now possible to visualize the time-series of matching sources on the Single Source Search service.

As you may know, Gaia DR1 provides time-series for variable sources, although it concerns only very few sources (i.e. all identified as part of Cepheids and RR-Lyrae, so: 3,194 sources in DR1). It is however expected to have much more time-series in Gaia DR2 :)

So, in preparation for DR2+, a new feature is now available on the Single Source Search page: a simple interactive time-series visualizer. It does not aim to do advance manipulation but only to give good preview of the time-series of the sources you are interested in.

This plot appears automatically when searching by object name, position or ID ONLY IF any time-serie is available for all the matching sources.

With this tool, you can:

25th July 2017 Cone Search Estimation
The size of a cone search query can now be quickly estimated.

On the web page of the Cone Search Service, an estimation of the query result size (in sources and bytes) is now proposed when setting the cone parameters in the form.

The first number gives the maximum number of sources that can be returned by the Cone Search query. The second value is the estimated size of the resulting VOTable based on the maximum number of sources.

The color of the estimated size may change: orange for GiB, red for TiB and grey otherwise.

Besides, if the estimated size is bigger than the limit of the Cone Search service, then a red OVERFLOW label is displayed. Thus, you will know that if you run the Cone Search query, the result will probably be truncated. Then, you should probably choose a smaller radius or decrease the verbosity flag (i.e. the number of columns you want to get).

13th December 2016 TAP examples with STILTS scripts
A STILTS script is now available for all query examples provided along the TAP service.

From the Gaia DR1, the ARI's TAP service has a special resource providing a list of query examples. This list is visible and usable in TOPCAT as described in the help page: "How to get ADQL examples in TOPCAT?" .

TOPCAT is developed together with a derived command line tool of the same author: STILTS . Thanks to this tool, you can easily reproduce queries, crossmatches, plots and anything you do in TOPCAT with just a single script file.

So, now, all examples provided by the TAP service are now associated with a STILTS script that you can download, and execute in order to easily and quickly reproduce the example and its figure(s). Do not hesitate to take inspiration from these scripts to fulfill your own use-cases.

TAP Examples

14th September 2016 Gaia DR1 online!
The first Gaia Data Release is now available on ARI's Gaia Services.

The full Gaia DR1 is now available on ARI's Gaia Services.

On this website you can get all information about the content of this release. All of the eight tables are described in details on  Data & Statistics. In addition of a detailed textual description, you will find statistics and sky-maps for all numerical columns of all available tables.

To query these data, the ARI provides three services:

26th August 2016 TAP Upload enabled in the Web interface
A new feature in the Web interface for TAP queries.

The TAP Web interface has now a new feature: the ability to upload one or several table when submitting an ADQL query.

However, there are some limitations you should be aware of:

  • The TAP protocol supports ONLY the VOTable format for uploaded tables. The Web form has then the same constraint.
  • When selecting a file, you will be asked a table name. This table name must start with a latin letter ({aA-zZ}) and may be followed only by an underscore (_), another latin letter ({aA-zZ}) or a digit ({0-9}).
  • There is no limit on the number of tables you can submit. However, you are limited on the size of the whole requests (2MB) and on the total number of rows (see the Capabilities of the TAP service).
9th August 2016 Rehearsal Gaia data ready for testing
The rehearsal Gaia data are simulated data aiming to help testing Gaia data access services before the real Gaia data release.

The rehearsal Gaia data for the first release are now accessible through the ARI's Gaia services. These data are simulated just for test purpose. Thus, you can see how services provided by ARI work and how you could use them for your own scientific purpose.