Dear ESASky user,

Many thanks for letting us know about this issue. Something had changed in the MAST TAP service, however, it should now be working again for you in ESASky.

Please let us know if you are still experiencing issues.

Best regards,

Deborah

Dear ESASky User,

Yes, it is possible to overlay a circle using CIRCLE, the central coordinates and radius (in degrees). E.g.:

{event: 'overlayFootprints', content:{'overlaySet': {'type': 'FootprintListOverlay', 'overlayName': 'test footprints', 'cooframe': 'J2000', 'color': 'red', 'lineWidth': 5, 'skyObjectList': [{'name': 'test footprint1', 'id': 1, 'stcs': 'CIRCLE ICRS 187.33912535049 -62.6616054228651 0.02', 'ra_deg': '187.287228500645', 'dec_deg': '-62.6876148176328'}]}}}

Here are some more examples of STCS strings (taken from the search tools information):

"BOX ICRS 11.421 41.764 10.071 41.765 10.079 40.864 11.411 40.863"

"POLYGON ICRS 9.97 41.04 11.13 41.94 11.45 42.0 11.34 41.51 10.15 40.53 9.79 40.80 9.97 41.03 9.97 41.03"

"CIRCLE ICRS 10.76 41.28 0.8"

In general, a BOX is the following:
BOX ICRS RA(1) DEC(1) RA(2) DEC(2) RA(3) DEC(3) RA(4) DEC(4).

A POLYGON can have more than 4 sets of coordinates: 
POLYGON ICRS RA(1) DEC(1).... RA(n) DEC(n).

And a CIRCLE has the coordinates and radius:

CIRCLE ICRS RA(1) DEC(1) Radius

Finally, I'm afraid the ESASky source code is not currently available.

I hope all this helps.

Kind regards,

Deborah on behalf of the ESASky team

We're happy to report that the issue has now been fixed and the Hubble and Webb images can again be viewed in ESASky!

Dear Casey,

We're happy to report that the issue has now been fixed and the Hubble and Webb images can again be viewed in ESASky!

This turned out to be a CORS issue with the CDN that has been fixed.

Many thanks for your patience and for reporting the issue to us.

Best regards,

Debbie on behalf of the ESASky team

Dear ESASky user,

The dotted lines indicate the direction of motion of the stars that have proper motion values in the Gaia DR3 catalogue. However, these dotted lines only change to the solid line when you zoom in enough to see the actual proper motion (or at least the position from epoch J2000 to J2016, the Gaia DR3 epoch). See these two screenshots as an example of zooming in on a star:

More information about this feature and the astrometric catalogues in ESASky can be found in the documentation here: https://www.cosmos.esa.int/web/esdc/esasky-interface#datapanel

I hope this answers your question and we hope you're finding ESASky useful.

Best regards,

Deborah

Dear Becky,

Thank you for your message. Please note that these outreach images are created by the HST mission for outreach purposes, and their astrometry will therefore sometimes not be as precise as Gaia. We will pass this information on to the Hubble Outreach team and see if there is anything that can be done to improve the astrometry of the images within ESASky. 

Kind regards,

Debbie, on behalf of the ESASky team

Hi, 

I'm afraid I can't reproduce the issue you are having with the Publications feature, I'm trying in the region you gave GAL 223.5904988 -08.6562613 with almost the same field of view: 9.6° X 4.8° (see image below). Perhaps you experienced a connection error between ESASky and the service we use to collect the publication data? Can you try again and if you're still having this issue, please provide us with a few more details (your operating system and the browsers you are trying).:

Regarding the blue shadows you see in the background image, these are indeed instrumental. The colour image you see in the background of ESASky comes from the second Digitized Sky Survey (DSS2), which is a digitized version of several photographic ground-based surveys of the sky, produced by the Space Telescope Science Institute between 1983 and 2006. The colour background (HiPS) in ESASky was created by the Strasboug astronomical Data Center (CDS) by combining the three DSS2 filters in the red, blue and infrared. What you're seeing here looks like a reflection of part of the telescope instrumentation in the blue filter images. 

Another user had a similar question about a different strange artifact in the same background sky, which might help answer your question: https://esdc.userecho.com/communities/1/topics/222-curious-as-to-what-this-is

Many thanks for contacting us and for using ESASky!

Kind regards,

Deborah on behalf of the ESASky team

Hi,

You can do this by right clicking in the sky (or press and hold if you are using a tablet or mobile) and a window appears with the coordinates and 5 icons: 

If you click on the SIMBAD or the NED icon, you will be taken to these tools and shown a list of objects that are in the region and how far away these objects lie from your cursor position. More information about this feature can be found here: 

https://www.cosmos.esa.int/web/esdc/esasky-interface#MODES

I hope this helps and many thanks for using ESASky.

Kind regards,

Debbie on behalf of the ESASky team

Hi, 

Many thanks for your message. Unfortunately the machines used to create the background skies (HiPS) were being upgraded last week and it took longer than expected, and all HiPS updates were on hold (including the M42 region). 

The updating of all HiPS has been restarted again and these images will be generated and visible soon in ESASky. Sorry for the inconvenience.

Many thanks for contacting us and for using ESASky.

Best regards,

Debbie, on behalf of the ESASky team

Dear Richard,

Many thanks for your message. Yes, it seems the outreach image functionality (where ESASky displays the entire image and goes to the centre of the image) is overruling the field of view and coordinate information. 

We'll work on solving this issue and let you know when it's fixed. 

Kind regards,

Debbie on behalf of the ESASky team