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Glossary of WSA attributes
This Glossary alphabetically lists all attributes used in the UKIDSSDR8 database(s) held in the WSA. If you would like to have more information about the schema tables please use the UKIDSSDR8 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

V
Name	Schema Table	Database	Description	Type	Length	Unit	Default Value	Unified Content Descriptor
var	iras_psc	IRAS	percent Likelihood of Variability	smallint	2			CODE_VARIAB
VAR_EXP_ID	twoxmm, twoxmm_v1_2, twoxmmi_dr3_v1_0	XMM	If the source is detected as variable (that is, if VAR_FLAG is set to True), the exposure ID ('S' or 'U' followed by a three-digit number) of the exposure with the smallest Chi² probability is given here.	varchar	4
VAR_FLAG	twoxmm, twoxmm_v1_2, twoxmmi_dr3_v1_0	XMM	The flag is set to True if this source was detected as variable (Chi² probability < 1E-5, see PN_CHI2PROB, M1_CHI2PROB, M2_CHI2PROB) in at least one exposure.	varchar	5
VAR_INST_ID	twoxmm, twoxmm_v1_2, twoxmmi_dr3_v1_0	XMM	If the source is detected as variable (that is, if VAR_FLAG is set to True), the instrument ID (PN, M1, M2) of the exposure given in VAR_EXP_ID is listed here.	varchar	2
variabilityTable	Programme	WSA	Table name of merged variable sources	varchar	64			??
variabilityTable	Programme	WSACalib	Table name of merged variable sources	varchar	64			??
variabilityTable	Programme	WSATransit	Table name of merged variable sources	varchar	64			??
variableClass	calVariability	WSACalib	Classification of objects across all bands.	int	4		-99999999
			This gives an overall classification. Currently the weighted intrinsicRMS/expectedRMS (wsrms) is calculated across all bands, where the weighting is directly proportional to the number of good observations in each band, where any bands with <5 observations have w=0 and the band with the most observations has a weighting of 1. If wsrms>3, then variableClass=1 (i.e. the source is variable), else variableClass=0. In the future, the classification will take into account other statistics, such as correlations between bands and will also include motion and skew, and will not be limited to 0 or 1.
variableClass	dxsVariability, udsVariability	WSA	Classification of objects across all bands.	int	4		-99999999
			This gives an overall classification. Currently the weighted intrinsicRMS/expectedRMS (wsrms) is calculated across all bands, where the weighting is directly proportional to the number of good observations in each band, where any bands with <5 observations have w=0 and the band with the most observations has a weighting of 1. If wsrms>3, then variableClass=1 (i.e. the source is variable), else variableClass=0. In the future, the classification will take into account other statistics, such as correlations between bands and will also include motion and skew, and will not be limited to 0 or 1.
vc	twomass_sixx2_xsc	2MASS	visual verification score for source	smallint	2
vc	twomass_xsc	2MASS	visual verification score for source.	smallint	2			CODE_MISC
vegaToAB	Filter	WSA	The constant to convert Vega magnitudes to AB magnitudes.	real	4	mag	-0.9999995e9
vegaToAB	Filter	WSACalib	The constant to convert Vega magnitudes to AB magnitudes.	real	4	mag	-0.9999995e9
vegaToAB	Filter	WSATransit	The constant to convert Vega magnitudes to AB magnitudes.	real	4	mag	-0.9999995e9
versionNum	Multiframe	WSA	a version number for this frame (if available)	real	4		-0.9999995e9	VERSNUM
			For deep stacks and mosaics produced in Edinburgh, (frameType=deep%stack, fileName=eYYYYMMDD_%) this refers to the database release number. For all other files, the versNum refers to the CASU pipeline version number.
versionNum	Multiframe	WSACalib	a version number for this frame (if available)	real	4		-0.9999995e9	VERSNUM
			For deep stacks and mosaics produced in Edinburgh, (frameType=deep%stack, fileName=eYYYYMMDD_%) this refers to the database release number. For all other files, the versNum refers to the CASU pipeline version number.
versionNum	Multiframe	WSATransit	a version number for this frame (if available)	real	4		-0.9999995e9	VERSNUM
			For deep stacks and mosaics produced in Edinburgh, (frameType=deep%stack, fileName=eYYYYMMDD_%) this refers to the database release number. For all other files, the versNum refers to the CASU pipeline version number.
versNum	AstrCalVers	WSACalib	Version number of current astrometric solution	int	4			ID_VERSION
versNum	AstrCalVers	WSATransit	Version number of current astrometric solution	int	4			ID_VERSION
versNum	AstrCalVers, PreviousAstrometry	WSA	Version number of current astrometric solution	int	4			ID_VERSION
versNum	PhotCalVers	WSACalib	the version number of the calibration	int	4			ID_VERSION
versNum	PhotCalVers	WSATransit	the version number of the calibration	int	4			ID_VERSION
versNum	PhotCalVers, PreviousMFDZP	WSA	the version number of the calibration	int	4			ID_VERSION
vFlag	rosat_bsc, rosat_fsc	ROSAT	variability flag	varchar	1			CODE_MISC
vigF	rosat_fsc	ROSAT	vignetting factor	float	8			INST_CORR-FACTOR
vigf	rosat_bsc	ROSAT	vignetting factor	float	8			INST_CORR-FACTOR
vMag	ukirtFSstars	WSA	V band total magnitude	real	4	mag	-0.9999995e9	PHOT_INT-MAG
vMag	ukirtFSstars	WSACalib	V band total magnitude	real	4	mag	-0.9999995e9	PHOT_INT-MAG
vr_m_opt	twomass_psc	2MASS	Visual or red magnitude of the associated optical source.	real	4	mag		SPECT_FLUX_VALUE