# Testing Hipscat Gaia vs ESA Gaia Service

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Author: Andy Tzanidakis ([e-mail])

Here I run a very simple test to check it the `epyc.washington` hipscatted Gaia DR3 catalog is consistent with the official ESA gaia_dr3.source catalog.

### Testing Locally

We will first begin with our local version:

gaia = lsdb.read_hipscat("/data3/epyc/data3/hipscat/catalogs/gaia_dr3/gaia")

We will query a 100" cone search around an open cluster:

# Coordinates to open cluster
ra, dec = 132.8460000, +11.8140000

rad = 100 # in arcseconds
_sample = gaia.cone_search(
    ra=ra,
    dec=dec, radius_arcsec=100)

print (_sample.compute().shape())
>> (61, 155)

**From the above we can see that we have found 61 sources in the following query.**

Now, we will perform the same search on the ESA Gaia service

### Testing with ESA `gaia_dr3.source`

Now we will run a simple AQDL query of the same search:

SELECT * 
FROM gaiadr3.gaia_source 
WHERE 
CONTAINS(
	POINT('ICRS',gaiadr3.gaia_source.ra,gaiadr3.gaia_source.dec),
	CIRCLE('ICRS',132.846,11.814,0.027777777777777776)
)=1


**hooray!** From the above we can see that there's also 61 rows (i.e., 61 sources found within this cone search radius)