| Reliable, but incomplete, point source catalogue derived from UKIDSS GPS |
| This view defines a reliable subset of point-like sources from the UKIDSS Galactic Plane Survey (GPS). If your application requires a seamless selection of reliable sources consistently classified as point-like (i.e. stars) in the GPS 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 use gpsPointSource since it is optimised for completeness and NOT high reliability. If a very clean, highly reliable selection is required, then use this view. Because reliability is optimised over completeness here, discrete classification codes are used as these are conservative in flagging ojects as point-like. The selection is based on stellar detecions in JHK (e.g. single passband detections will NOT appear in this view). |
SELECT *
FROM gpsSource
/* Seamless selection of unique objects: */
WHERE (priOrSec <= 0 OR priOrSec = frameSetID)
/* High quality (but deblended allowed), highly likely point detection in J, H and K1: */
AND jClass = -1 AND jppErrBits BETWEEN 0 AND 31
AND hClass = -1 AND hppErrBits BETWEEN 0 AND 31
AND k_1Class = -1 AND k_1ppErrBits BETWEEN 0 AND 31
/* High quality, highly likely point detection, OR none, in K2: */
AND (k_2Class=-1 OR k_2Class = -9999) AND k_2ppErrBits <= 31
/* J, H and K (1st epoch) positional coincidence within 0.5 arcsec: */
AND jXi BETWEEN -0.5 AND +0.5 AND jEta BETWEEN -0.5 AND +0.5
AND hXi BETWEEN -0.5 AND +0.5 AND hEta BETWEEN -0.5 AND +0.5
AND k_1Xi BETWEEN -0.5 AND +0.5 AND k_1Eta BETWEEN -0.5 AND +0.5
The details of the table defined by this view are available here.