X
Name	Schema Table	Database	Description	Type	Length	Unit	Default Value	Unified Content Descriptor
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	PSSA	Intensity-weighted X-centroid of image	float	8	microns		POS_PLATE_X
xCen	Detection	SSA	Intensity-weighted X-centroid of image	float	8	microns		POS_PLATE_X
xmax	Detection	PSSA	Rightmost extent of image on plate	float	8	microns		POS_PLATE_X
xmax	Detection	SSA	Rightmost extent of image on plate	float	8	microns		POS_PLATE_X
xmin	Detection	PSSA	Leftmost 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
xph	twomass_sixx2_scn	2MASS	downgrade from DB photom. overlap compar. (non-cloud) (0|1)	smallint	2
xPnt	Plate	PSSA	Centre of scan area in X	real	4	microns		POS_PLATE_Y
xPnt	Plate	SSA	Centre of scan area in X	real	4	microns		POS_PLATE_Y
xscID	CrossNeighbours2MASSXSC	SSA	The object identifier (ext_key) from TWOMASS.twomass_xsc	int	4			ID_CATALOG