Comments (3)
These correspond to the number of tables in the catalog. Here II/335
has 5 tables whereas II/312
has 2. It looks like you only get matches from the first table of the catalog each time.
[Edit]
I looked into these two catalogs:
II/355
: the first table has way more sources, so it makes sense that it would match more.II/312
:the two tables have the same sources, so they should both match. There might be something strange here, I'm investigating.Also don't have the same sources, and you have matches only in the first table here too
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So, the results of the investigation (I got lots of explanations from @glandais). Actually, if the results matched in all tables, we'd expect [1,1,1,1,1,2,2,2,2,2...]
for a catalog with 5 tables and [1,1,2,2,3,3...]
for a catalog with 2 tables. So this is indeed a bug, likely a counter that does not increment in the right place) that @glandais will try to fix upstream.
Possible workarounds while waiting for the fix upstream
- you can add the
_1
column that contains the position you sent if needed, and this one has no bug - If you do the
query_region
search on single tables (II/335/galex_ais
) rather than on catalogs (II/335
) the_q
counter works without issues
from astroquery.vizier import Vizier
t = Vizier(catalog="II/335", columns=['*', '_RAJ2000', '_DEJ2000']).query_constraints()[0][:10]
# query them in the catalog 'II/335'
result = Vizier(columns=["_1"]).query_region(t, width="5s", catalog=["II/335/galex_ais"])[0]
<Table length=10>
_q _1 RAJ2000 DEJ2000 Name r.fov b FUVmag ... e_NUVmag Fafl Nafl Fexf Nexf Fr Nr
deg deg deg mag ... mag deg deg
int32 str24 float64 float64 str22 float64 uint8 float64 ... float32 int16 int16 int16 int16 float64 float64
----- ---------------------- ---------- ---------- ---------------------- --------- ----- ------- ... -------- ----- ----- ----- ----- --------- ---------
1 45.39319700+0.83199900 45.393197 0.831999 GALEX J030134.3+004955 0.462940 1 -- ... 0.1268 256 0 0 0 -- 0.002794
2 45.37659800+0.83901900 45.376598 0.839019 GALEX J030130.3+005020 0.465953 1 -- ... 0.4780 256 1 0 0 -- 0.002680
3 45.38394100+0.84482200 45.383941 0.844822 GALEX J030132.1+005041 0.529154 1 -- ... 0.4722 0 0 0 0 -- 0.001294
4 45.40180000+0.84974100 45.401800 0.849741 GALEX J030136.4+005059 0.482279 3 22.1674 ... 0.3064 0 0 0 0 0.002074 0.004597
5 45.31170800+0.79905800 45.311708 0.799058 GALEX J030114.8+004756 0.416818 3 20.2951 ... 0.0783 0 0 0 0 0.004551 0.002193
6 45.30472100+0.80272300 45.304721 0.802723 GALEX J030113.1+004809 0.419970 1 -- ... 0.4482 0 0 0 0 -- 0.002482
7 45.32065300+0.81063500 45.320653 0.810635 GALEX J030116.9+004838 0.429153 1 -- ... 0.4141 0 1 0 0 -- 0.002241
8 45.32989800+0.81712200 45.329898 0.817122 GALEX J030119.1+004901 0.436609 3 21.5729 ... 0.4035 0 1 0 0 0.003513 0.004100
9 45.33925000+0.81810400 45.339250 0.818104 GALEX J030121.4+004905 0.438789 1 -- ... 0.3703 0 0 0 0 -- 0.004177
10 45.32492500+0.83517700 45.324925 0.835177 GALEX J030117.9+005006 0.454001 1 -- ... 0.3431 0 1 0 0 -- 0.002732
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Many thanks for explaining this!
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