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Pixinsight Image Annotation with GAIA DR2 - how to find objects with Vizier?


dan_adi

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Hello,

I used PIs Image Annotation script with GAIA DR2 catalogue on my image. 

I get quite a few objects annotated, somewhere around 3000 of them. Luckily the script also generates a txt file with the objects.

The object ID id like: 1635992831624107008

When I go to Vizier->GAIA DR2 catalogue and enter the IDs provided by PI I don't get a return, the object is not found.

I must be doing something wrong on the vizier website

 These are the first IDs from the list if anyone knows how to search for them in Vizier:

1635992831624107008
1635992831624107776
1635992870279767552
1635993248235648896
1635993278300714752
1635993209581371392
Also the link to vizier: Vizier

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What does the .txt file look like? Mine looks like below with Gaia DR2 annotation:

Capture123123.JPG.6d54decc4280f7e40e006dba97a9fdb6.JPG

You could search with the coordinates instead of the SourceID (if that is what you pasted). But i think there is no mistake and a page for the star you searched simply does not exist. I dont think all of the catalogue is uploaded to vizier or simbad because there is just so much to upload and 99.9% of the objects are just another star.

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27 minutes ago, ONIKKINEN said:

What does the .txt file look like? Mine looks like below with Gaia DR2 annotation:

Capture123123.JPG.6d54decc4280f7e40e006dba97a9fdb6.JPG

You could search with the coordinates instead of the SourceID (if that is what you pasted). But i think there is no mistake and a page for the star you searched simply does not exist. I dont think all of the catalogue is uploaded to vizier or simbad because there is just so much to upload and 99.9% of the objects are just another star.

That is strange ... my text file looks like yours but my Name/SourceID doesn't  start with 3 but 1

Gaia Data Release 2 (Gaia collaboration et al., 2018, 1,692,919,135 sources)
Name;RA(deg);Dec(deg);PixelX;PixelY;SourceID;RPmag;Gmag;BPmag;Parallax;RadialVelocity;Radius;Luminosity
1635992831624107008;250.016699;65.791918;133.377575;7815.995706;1635992831624107008;17.7037;18.1383;18.3954;0.0374;;;
 

Edited by dan_adi
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1 hour ago, dan_adi said:

That is strange ... my text file looks like yours but my Name/SourceID doesn't  start with 3 but 1

Gaia Data Release 2 (Gaia collaboration et al., 2018, 1,692,919,135 sources)
Name;RA(deg);Dec(deg);PixelX;PixelY;SourceID;RPmag;Gmag;BPmag;Parallax;RadialVelocity;Radius;Luminosity
1635992831624107008;250.016699;65.791918;133.377575;7815.995706;1635992831624107008;17.7037;18.1383;18.3954;0.0374;;;
 

It looks like the Gaia name ID is based on the RA coordinates, both numbers are very similar at least. Makes sense to catalogue the stars with the coordinates in the name and not give each new object its own arbitrary catalogue number.

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11 hours ago, ONIKKINEN said:

Makes sense to catalogue the stars with the coordinates in the name

The same is common for galaxies, where the ID is a combination of a prefix and RA and DEC in hrs:mins:secs+/-degs:mins:secs

J22293917-1945018

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