The catalogues were matched sequentially in the order listed. Relevant object parameters were transferred to existing records and then new objects added.
Step | GSC2 objects | Catalogue Matched | Catalogue Objects | Objects Matched | Objects Added |
---|---|---|---|---|---|
1 | 945,443,930 | GAIA dr1 | |||
2 | 1,402,202,680 | APASS dr9 | 61,176,401 | ||
3 | 1,402,202,680 | UCAC5 | |||
4 | 1,402,202,680 | 2MASS | |||
5 | 1,449,951,394 | SDSS | |||
6 | 1,757,241,273 | VISTA VHS dr4 | |||
7 | VISTA VIKING | ||||
8 | VST ATLASS | ||||