Your comments

Dear Roland,

I'm happy to announce that the latest version of ESASky allows the overlay of catalogues from VizieR (CDS)! All details can be found here:

Kind regards,


Dear Andy,

Many thanks for your suggestion and good to hear from you! Yes, we agree this would be a great feature to add to ESASky and we will include it to our backlog list.

Depending on the catalogue, it may require expert knowledge, or at least feedback from the catalogue experts, since each catalogue and mission provide different types of columns and errors. My question to you is, do you know the columns in the Chandra and XMM catalogues that you would use, or that you are indeed using now, to compute the size of the error region? I see that CSC2 provides columns for the major and minor radius of error ellipse (in arcsec) and the position angle error ellipse (in degrees), however 4XMM-DR12 has different columns.

Many thanks and I’m happy you’re still using ESASky!


Dear Adriano Palenga,

Unfortunately we don't have that functionality at the moment in ESASky but we have it in our list of features to add! 

The closest functionality ESASky currently has is if you right click on the object and select SIMBAD or NED, you'll then be directed to these name resolver websites and can find the name of the objects there. Also, if you load some catalogues in ESASky and click on the source, you'll be shown the name:

Image 102

We'll let you know when object names can be shown in the sky with ESASky.

Many thanks for you feedback and interest in ESASky.

Kind regards,


Dear Bruno, 

Many thanks for reporting the bug. After some investigation the team has discovered that it's related to a publication lacking a title in ADS. We'll work on the issue and let you know when it's fixed.

Best regards,

Debbie, on behalf of the ESASky team

Dear User,

ESASky displays the most recent Gaia Data Release catalogue, currently this is the gaia_source catalogue from Data Release 3 (DR3):  

The Gaia documentation points out the following (see here, section 'Gaia source identifiers': ):

'[...] As explained in previous announcements, there are various reasons why the identifier of a specific source may change or disappear when going from the Gaia DR1 to the Gaia DR2 source list and on to the Gaia DR3 source list. Users of Gaia data should thus be aware that the source list for Gaia DR3 should be treated as independent from Gaia DR2 and from Gaia DR1. With each new Gaia data release, the source list is becoming progressively more stable. [...]' 

Therefore, you may be encountering this problem, you are trying to search for source identifiers in the DR2 gaia_source catalogue that no longer have the same identifier in the DR3 gaia_source catalogue.

I've gone to the Gaia archive ( ) and searched the Gaia DR2 gaia_source table for the 6 source_ids you provide and I can only find four of them, I do not find Gaia DR2 341867587319687808080 nor Gaia DR2 332351565654370895104. I used the following ADQL: 

SELECT source_id, ra, dec FROM gaiadr2.gaia_source
where source_id = 341867587319687808080

Or you can do this from the basic search form if you are not familiar with ADQL and the Gaia archive:

There is also a table in the Gaia archive called gaiaedr3.dr2_neighbourhood, that has both the Gaia DR2 and Gaia E/DR3 names. Looking at this table, and also the coordinates of the DR2 and DR3 sources, I believe the DR3 equivalent source_ids are these (again, I can not find the same two sources Gaia DR2 341867587319687808080 nor Gaia DR2 332351565654370895104) :

Gaia DR2 3347696388965946752 -> Gaia DR3 3347696388966821504

Gaia DR2 3335642026377082496 -> Gaia DR3 3335642030674836992

Gaia DR2 154466544592085888 -> Gaia DR3 154466544593135616

Gaia DR2 3419692199896487680 -> Gaia DR3 3419692204194118272

(I used the following ADQL: 

SELECT * FROM gaiaedr3.dr2_neighbourhood
where dr2_source_id = 3335642026377082496 


And I can confirm these four DR3 source ids are there in ESASky. 

If you need any help with the ESA Gaia archive, please check the FAQs ( or contact our colleagues here:

Please let us know if there is anything else we can help you with in ESASky and many thanks for using the tool!

Kind regards,

Deborah, on behalf of the ESASky team


Yes, we plan on supporting VOTable uploads as well.

We'll let you know when this is available!

Kind regards,


Dear User,

It is possible to upload a user table via the target lists feature: in Science mode click on the scroll icon in the search field (in Explorer mode, there is also a dedicated icon in the top left). Then select 'Upload Target List' and load your list of targets (either names that can be resolved by Simbad, or a list of coordinates). Each target will show as a green square and you can scroll or play through your list. Help on the feature can be found here:

The format needed to display uploaded target lists, and some examples, can be found here: Target lists - ESDC - Cosmos (

And next year we are planning to add user areas to ESASky, where you'll be able to upload and save your own user tables. 

I hope this is what you are looking for.

Kind regards,

Debbie, on behalf of the ESASky team

I'm glad we found it, and glad it wasn't an ESASky bug in the end!

Many thanks for contacting us!

Best regards,


Hi Andy,

Could it be your SIMBAD output format options here? : 

Do you have the file output selected? 

Can you also test from this direct link, does it also download a file? :"

Many thanks,


Dear Andy,

Good to hear from you, but sorry you're experiencing a bug! We don't seem to be able to reproduce this, trying a number of browsers and operating systems. Can you tell us which Gaia source you're trying and with which browser, browser version and Operating System you're using? 

Many thanks and regards,