GaiaQueryStep

If you don’t have an absolute astrometric catalog to hand, this automates grabbing a Gaia DR3 catalogue around your target. You need to make sure your target is resolvable, and for large sources (or far away backgrounds) you may need to bump up the radius value.

API

class pjpipe.GaiaQueryStep(target, out_dir, row_limit=-1, radius=15, overwrite=False)[source]

Query Gaia to get sources for astrometric alignment

Parameters:

  • target – Target to get GAIA sources for

  • out_dir – Where to save GAIA catalog to

  • row_limit – Maximum number of rows to return. Defaults to -1, which will return everything

  • radius – Radius in arcmin to query. Defaults to 15

  • overwrite – Whether to overwrite or not. Defaults to False

do_step()[source]

Run Gaia catalog query

make_catalog(out_name)[source]

Create a Gaia catalog

Parameters:

out_name – Name to save catalog to