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Glossary of WSA attributes
This Glossary alphabetically lists all attributes used in the UKIDSSDR9 database(s) held in the WSA. If you would like to have more information about the schema tables please use the UKIDSSDR9 Schema Browser (other Browser versions).

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

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T

U

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X

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Z

X
Name	Schema Table	Database	Description	Type	Length	Unit	Default Value	Unified Content Descriptor
x	UKIDSSDetection	WSA	X coordinate of detection	real	4	pixels		POS_PLATE_X
x	calDetection, calListRemeasurement	WSACalib	X coordinate of detection {catalogue TType keyword: X_coordinate} Intensity-weighted isophotal centre-of-gravity in X.	real	4	pixels		POS_PLATE_X
x	dxsDetection, gcsDetection, gcsListRemeasurement, gpsDetection, gpsListRemeasurement, lasDetection, lasListRemeasurement, 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	ptsDetection	WSATransit	X coordinate of detection {catalogue TType keyword: X_coordinate} Intensity-weighted isophotal centre-of-gravity in X.	real	4	pixels		POS_PLATE_X
x	udsDetection	WSA	X coordinate of detection (SE: X_IMAGE) {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_IMAGE	mgcDetection	MGC	Object x position	real	4	pixel
X_OFF	mgcGalaxyStruct	MGC	X offset of Galaxy Centre	real	4		99.99
X_OFFm	mgcGalaxyStruct	MGC	X offset error (-)	real	4		99.99
X_OFFp	mgcGalaxyStruct	MGC	X offset error (+)	real	4		99.99
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
xErr	UKIDSSDetection	WSA	Error in X coordinate	real	4	pixels		ERROR
xErr	calDetection, calListRemeasurement	WSACalib	Error in X coordinate {catalogue TType keyword: X_coordinate_err} Estimate of centroid error.	real	4	pixels		ERROR
xErr	dxsDetection, gcsDetection, gcsListRemeasurement, gpsDetection, gpsListRemeasurement, lasDetection, lasListRemeasurement, udsListRemeasurement	WSA	Error in X coordinate {catalogue TType keyword: X_coordinate_err} Estimate of centroid error.	real	4	pixels		ERROR
xErr	ptsDetection	WSATransit	Error in X coordinate {catalogue TType keyword: X_coordinate_err} Estimate of centroid error.	real	4	pixels		ERROR
xErr	udsDetection	WSA	Error in X coordinate (SE: ERRX2_IMAGE½) {catalogue TType keyword: X_coordinate_err} Estimate of centroid error.	real	4	pixels		ERROR
xifitrms	dxsAstrometricInfo, udsAstrometricInfo	WSA	RMS errors in fit for xi	float	8	arcsec	-0.9999995e9	??
xisc	dxsAstrometricInfo, udsAstrometricInfo	WSA	Scale factor in xi	float	8		-0.9999995e9	??
xizp	dxsAstrometricInfo, udsAstrometricInfo	WSA	Zeropoint offset in xi	float	8	arcsec	-0.9999995e9	??
xnfitrms	dxsAstrometricInfo, udsAstrometricInfo	WSA	RMS errors in fit for xn	float	8	arcsec	-0.9999995e9	??
xnsc	dxsAstrometricInfo, udsAstrometricInfo	WSA	Scale factor in xn	float	8		-0.9999995e9	??
xnzp	dxsAstrometricInfo, udsAstrometricInfo	WSA	Zeropoint offset in xn	float	8	arcsec	-0.9999995e9	??
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
xPixSize	CurrentAstrometry	WSACalib	Angular size of pixels in X	real	4	Arcseconds	-0.9999995e9	POS_ANG_DIST_GENERAL
xPixSize	CurrentAstrometry	WSATransit	Angular size of pixels in X	real	4	Arcseconds	-0.9999995e9	POS_ANG_DIST_GENERAL
xPixSize	CurrentAstrometry, PreviousAstrometry	WSA	Angular size of pixels in X	real	4	Arcseconds	-0.9999995e9	POS_ANG_DIST_GENERAL
xPos	nvssSource	NVSS	X position (RA direction) of the radio source	real	4	pixels		POS_CCD_X
xscprox	wise_prelimsc	WISE	Distance between the WISE source position and the position of a nearby 2MASS XSC source, if the separation is less than 1.1 times the Ks isophotal radius size of the XSC source This column is default if there is no 2MASS XSC source in proximity to the WISE source	real	4	arcsec	-0.9999995e9
xSize	MultiframeDetector	WSA	Corresponding image size (X); value only available if catalogue file exists {catalogue extension keyword:  NXOUT}	int	4		-99999999	NUMBER
xSize	MultiframeDetector	WSACalib	Corresponding image size (X); value only available if catalogue file exists {catalogue extension keyword:  NXOUT}	int	4		-99999999	NUMBER
xSize	MultiframeDetector	WSATransit	Corresponding image size (X); value only available if catalogue file exists {catalogue extension keyword:  NXOUT}	int	4		-99999999	NUMBER
xTalkFlag	MultiframeDetector	WSA	Xtalk flag, set if xtalk check has been done. {image extension keyword: XTALK}	varchar	32		NONE
xTalkFlag	MultiframeDetector	WSACalib	Xtalk flag, set if xtalk check has been done. {image extension keyword: XTALK}	varchar	32		NONE
xTalkFlag	MultiframeDetector	WSATransit	Xtalk flag, set if xtalk check has been done. {image extension keyword: XTALK}	varchar	32		NONE