Offset between Euclid and Gaia

Hi Vasily,

Thanks for reporting this issue. The catalogues should align with the images, so you are definitely experiencing a bug. 

It has proven to be very difficult to reproduce the issue. Would you mind sharing some additional information to help us resolve it?

1. Does this issue happen every time you use ESASky (i.e. does it remain after reloading ESASky)?
2. Which browser and browser version are you using?
3. Do you see the same issue in other browsers?
4. What is your MacOS version?

Cheers,

Henrik Norman

ESASky

Just tried in Chrome - same offset

Offset is perisitent for any catalog I want to overplot

Do you get the correct positions?

That is very helpful! Yes, all catalogues align nicely for me and all the others except one. We've now been able to reproduce it on one MacOS 10.15, but no other Macbooks (or other computers) so far. So the issue seems to only affect a few Macbooks. I bet you won't see the offset if you try it on your phone. 

Anyway, hopefully, this is enough information to track down the issue. We'll keep you posted. 

Thank you!

Thanks, Henrik!

We've identified the issue as being related to Aladin Lite, and we've notified the developers of that tool. You can see the progress here: https://github.com/cds-astro/aladin-lite/issues/266

Thanks, Henrik!

So far, 

1. every time

2. Safari

3. Let me try

4. 15.3.2 (24D81)

Safari version Version 18.3.1 (20620.2.4.11.6)

Wait, this is not about Gaia. All catalogues, including Euclid, are offset from the images. Why?

Clearly, Gaia sources do not line up with their Euclid images