| Reliable, but incomplete, source catalogue derived from UKIDSS DXS |
| This view defines a reliable subset of all sources from the UKIDSS Deep eXtragalactic Survey (DXS). If your application requires a seamless selection of reliable sources in the DXS then use this view. NB: as always, there is a trade-off between completeness and reliability. If completeness is more important than high reliability, then make your sample selection from dxsSource directly with appropriate predicates. If a very clean, highly reliable selection is required, then use this view. Selection is based on detecions in JK (e.g. single passband detections will NOT appear in this view). |
SELECT *
FROM dxsSource
/* Seamless selection of unique objects: */
WHERE (priOrSec <= 0 OR priOrSec = frameSetID)
/* Good quality detection in both J and K: */
AND jppErrBits BETWEEN 0 AND 255
AND kppErrBits BETWEEN 0 AND 255
/* Good quality detection, OR none, in H: */
-- AND hppErrBits <= 255
/* J and K positional coincidence within 0.5 arcsec: */
AND jXi BETWEEN -0.5 AND +0.5 AND jEta BETWEEN -0.5 AND +0.5
AND kXi BETWEEN -0.5 AND +0.5 AND kEta BETWEEN -0.5 AND +0.5
/* H positional tolerance within 0.5 arcsec if available: */
-- AND ((hXi BETWEEN -0.5 AND +0.5 AND hEta BETWEEN -0.5 AND +0.5) OR (hXi < -0.9e9))
The details of the table defined by this view are available here.