get_catalog

stcal.tweakreg.astrometric_utils.get_catalog(right_ascension, declination, epoch=2016.0, search_radius=0.1, catalog='GAIADR3', timeout=30.0)[source]

Extract catalog from VO web service.

Parameters:

  • right_ascension (float) – Right Ascension (RA) of center of field-of-view (in decimal degrees)

  • declination (float) – Declination (Dec) of center of field-of-view (in decimal degrees)

  • epoch (float, optional) – Reference epoch used to update the coordinates for proper motion (in decimal year). Default: 2016.0

  • search_radius (float, optional) – Search radius (in decimal degrees) from field-of-view center to use for sources from catalog. Default: 0.1 degrees

  • catalog (str, optional) – Name of catalog to query, as defined by web-service. Default: ‘GAIADR3’

  • timeout (float, optional) – Timeout in seconds to wait for the catalog web service to respond. Default: 30.0 s

Returns:

csv – CSV object of returned sources with all columns as provided by catalog

Return type:

~astropy.table.Table