CatalogQuerier

class CatalogQuerier[source]

Class to handle external data queries using Astroquery Vizier. This class is a wrapper for the Astroquery Vizier and Skybot classes. This class providies

Vizier catalog query (SDSS, GAIA, 2MASS, AllWISE, PS1)
- SDSS: SDSS DR17
- GAIA: Gaia DR3
- 2MASS: 2MASS All-Sky Point Source Catalog
- AllWISE: AllWISE Data Release
- PS1: PanSTARRS DR1
Skybot catalog query (SKYBOT)
- SKYBOT: Skybot

__init__(catalog_key=None)[source]

Methods

query(self, coord, epoch=None, radius_arcsec=3600)

Query a specific catalog around given coordinates.

This method will search for the catalog in the catalog defined by the current_catalog_key. If the current_catalog_key is ‘SKYBOT’, it will use the Skybot catalog query. Otherwise, it will use the Vizier catalog query.

Parameters:

coord (SkyCoord) – The coordinates to query.
epoch (Time, optional) – The epoch to query.
radius_arcsec (float, optional) – The radius to query in arcseconds.

Returns:

The catalog table.

Return type:

Table

change_catalog(self, catalog_key)

Change the current catalog to query.

Parameters:: catalog_key (str) – The catalog key to change to.
Return type:: None

show_available_catalogs(self)

Display available catalogs.

Returns:: list of catalog keys – List of available catalogs.
Return type:: list

Properties

Key Properties

Property	Description
`catalog_ids`	Get the available catalog IDs.
`config`	Get the configuration of the CatalogQuerier.
`current_catalog_id`	Get the current catalog ID.