| Merged, seamless extended source catalogue derived from the UKIDSS LAS |
| This view defines a subset of extended sources from the UKIDSS Large Area Survey (LAS). If your science application requires a seamless, reliable selection of sources consistently classified as extended in the LAS (e.g. galaxies) then use this view. Detection is required in all bands except Y, and selection is based on discrete classification codes "Galaxy" (+1) or "Probable Galaxy" (-3). |
SELECT *
FROM lasSource
/* Seamless selection of unique sources: */
WHERE (priOrSec <= 0 or priOrSec = frameSetID)
/* Good quality, extended detection in J1, H and K: */
AND (j_1Class = +1 OR j_1Class = -3) AND j_1ppErrBits < 256
AND (hClass = +1 OR hClass = -3) AND hppErrBits < 256
AND (kClass = +1 OR kClass = -3) AND kppErrBits < 256
/* Good quality, extended detection, or no detection, in Y and J2: */
AND (yClass = +1 OR yClass = -3 OR yClass = -9999) AND yppErrBits < 256
AND (j_2Class = +1 OR j_2Class = -3 OR j_2Class = -9999) AND j_2ppErrBits < 256
The details of the table defined by this view are available here.