This table is used by the spatial search functions in order to find the objID of records in the main catalogue that overlap/contained within the search functions,
This table supports both the JHU HTM functions as well as the Microsoft Geography functions and is present in Astronomy catalogues available to query at MAST.
This table is REQUIRED for functions to work but is not recommended to be used by users. The columns listed are NOT always in every catalogue database.
| Field Name | Field Description | Required for spatial functions |
|---|---|---|
| objID | internal DB identifier in main catalogue record | x |
| ra | Right Ascension | |
| dec | Declination | |
| cx | 3-vector x axis | |
| cy | 3-vector y axis | |
| cz | 3-vector z axis | |
| htmID | encoded position as hierarchical triangulated mesh ID | x |
| spatial | encoded position as MS geography object | x |
| zoneID | declination zone for fast object matching | |
| healpixID | encoded position as healPix ID | |
| glon | galactic longitude | |
| glat | galatic latitude | |
| elon | ecliptic longitude | |
| elat | ecliptic latitude | |
| mag | generic magnitude (sometime used in matching) |
