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** Announcement - Workshop: Science from UKIDSS II, 15-17 Dec 2008, London UK **
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Glossary of WSA attributes

This Glossary alphabetically lists all attributes used in the UKIDSSEDR database(s) held in the WSA. If you would like to have more information about the schema tables please use the UKIDSSEDR Schema Browser (other Browser versions).
A B C D E F G H I J K L M
N O P Q R S T U V W X Y Z

X

NameSchema TableDatabaseDescriptionTypeLengthUnitDefault ValueUnified Content Descriptor
x dxsDetection, dxsListRemeasurement, gcsDetection, gcsListRemeasurement, gpsDetection, gpsListRemeasurement, lasDetection, lasListRemeasurement, udsDetection, udsListRemeasurement WSA X coordinate of detection {catalogue TType keyword: X_coordinate}
Intensity-weighted isophotal centre-of-gravity in X.
real 4 pixels   POS_PLATE_X
x_coadd twomass_xsc 2MASS x (cross-scan) position (coadd coord.). real 4 arcsec   INST_POS
x_scan twomass_psc 2MASS Mean cross-scan focal plane position of the source in the Universal scan (U-scan) coordinate system. real 4 arcsec   INST_POS
xCen Detection SSA Intensity-weighted X-centroid of image float 8 microns   POS_PLATE_X
xErr dxsDetection, dxsListRemeasurement, gcsDetection, gcsListRemeasurement, gpsDetection, gpsListRemeasurement, lasDetection, lasListRemeasurement, udsDetection, udsListRemeasurement WSA Error in X coordinate {catalogue TType keyword: X_coordinate_err}
Estimate of centroid error.
real 4 pixels   ERROR
xmax Detection SSA Rightmost extent of image on plate float 8 microns   POS_PLATE_X
xmin Detection SSA Leftmost extent of image on plate float 8 microns   POS_PLATE_X
xph twomass_scn 2MASS Special flag indicating whether or not another photometric problem, not obviously cloud related, was found in the scan after comparing its photometry to that of overlapping scans. smallint 2     CODE_MISC
xPixSize CurrentAstrometry, PreviousAstrometry WSA Angular size of pixels in X real 4 Arcseconds -0.9999995e9 POS_ANG_DIST_GENERAL
xPnt Plate SSA Centre of scan area in X real 4 microns   POS_PLATE_Y
xSize MultiframeDetector WSA Corresponding image size (X); value only available if catalogue file exists {catalogue extension keyword:  NXOUT} int 4   -99999999 NUMBER



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27/01/2009