Your comments

Dear Becky,

Many thanks for the suggestion! I've put it in our backlog and we'll investigate if it's technically possible to do or if special access to ADS is needed. 


Kind regards,

Deborah on behalf of the ESASky team 

Dear Becky,

We are working on improvements to our sky viewer and in the near future users will be able to visualise many more sources without compromising the speed of your browser.

In the meantime, if you want to obtain a very large number of Gaia sources and plot them in the sky, I would suggest trying pyESASky (our Jupyter widget) along with the Gaia astroquery module (and to at least apply some filters to obtain good quality sources). Here's an example that can be pasted into a jupyter notebook: 

# Import the required python modules:
from pyesasky import ESASkyWidget
from astroquery.gaia import Gaia
# Instantiate and load the pyESASky instance
esasky = ESASkyWidget()
esasky
#Set the target, field of view and background sky
esasky.setFoV(6.6)
esasky.goToRADec('246.805777', '-24.517895')
esasky.setHiPS('AllWise color')
# Query the Gaia catalogue in this region, a conesearch with radius 1.5 degrees and
# apply some quality filters: good astrometry where RUWE < 1.4 and good parallax > 0.
job = Gaia.launch_job_async("SELECT gaia.source_id, gaia.ra, gaia.dec, gaia.parallax, gaia.pmra, gaia.pmdec FROM gaiadr2.gaia_source as gaia \
INNER JOIN gaiadr2.ruwe \
ON gaia.source_id = gaiadr2.ruwe.source_id \
WHERE CONTAINS(POINT('ICRS',gaia.ra,gaia.dec),CIRCLE('ICRS',246.805777, -24.517895, 1.5))=1 \
AND gaiadr2.ruwe.ruwe < 1.4 \
AND gaia.parallax > 0")
Gaia = job.get_results()
Gaia
# Send the catalogue to be viewed in pyESASky
esasky.overlayCatalogueFromAstropyTable('Gaia', 'J2000', '#33c9cc', 5, Gaia, 'ra', 'dec','source_id')

A conesearch of radius 1.5 degrees brings back 88402 Gaia sources and when you send these to pyESASky, this many sources look like this in the sky (i.e. most of them merge into one another, one needs to zoom to see the individual sources):

Information on pyESASky can be found here: 

https://www.cosmos.esa.int/web/esdc/pyesasky

and in this video: 

I hope all this helps,
Regards,

Debbie on behalf of the ESASky team

Dear Maria,

We also have an ESASky javascript API  and we are working with some of the ESA astronomy archives to use this in their UI - keep watching our archives, news will come! More information on the API:

https://www.cosmos.esa.int/web/esdc/esasky-javascript-api

Many thanks for your feedback!

Debbie on behalf of the ESASky team

Dear Becky,

Can you please try working with Gaia DR2 data in this region again? In our latest release of ESASky we have a new strategy, and in large fields like the one you sent, ESASky shows the mission coverage and users are able to apply filters directly on the coverage. For example, the rho Oph field, about 6.6 x 4 degrees, has almost 2.5 million Gaia sources. If I do a rough filter on the pmra and pmdec (-7.5 to -3.5 and -23.7 to -19.7), this brings back less than 2000 sources, which are displayed in the sky and details given in the data panel. The performance/speed should also be better with this release.

Please let us know if this works well for you.


Kind regards,

Debbie on behalf of the ESASky team

Dear Stefanie,

Many thanks for reporting this bug to us. We've just fixed the issue now and you should see the correct name in ESASky when you reload the tool. In our next release we will add the full designation in the name column, with 'GaiaDR2' at the beginning of the name. 

Kind regards,

Deborah on behalf of the ESASky team

Dear Ming Yang,

In the latest release of ESASky it is now possible to switch the equatorial coordinates formats from sexagesimal to decimal. Click on the coordinates in the top left of ESASky and you will see the format changing in the data panel when you have loaded up some data. 


This feature is also shown in our video on the latest updates in ESASky (minute 2:17):



Many thanks for all your really useful suggestions!

Kind regards,

Debbie

on behalf of the ESASky team