index files for Gaia 5200 series - LITE?

[Cliff Kotnik]

I am running the astrometry.net code locally on my ubuntu server.  I want to try using Gaia for the index files.  My understanding from looking at other posts on this group is that a combination of Gaia and Tycho would be the way to do this.  Looking at the index files at https://portal.nersc.gov/project/cosmo/temp/dstn/index-5200/ I note the subdirectory "LITE".  What are the implications of using the somewhat smaller files in this subdirectory?

thanks,

Cliff

[Dustin Lang]

Hi,

The "LITE" ones will be equally good for astrometric solving.  The "heavy" ones carry some extra Gaia catalog data, which I think get carried into the "rdls" or "corr" files.

And IIRC, the 5200 series do merge Tycho-2 and Gaia-DR2 stars.

cheers,

--dustin

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