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

D
Name	Schema Table	Database	Description	Type	Length	Unit	Default Value	Unified Content Descriptor
d	Source	SSA	The great-circle distance of the source from the Galactic centre	real	4	degrees		POS_ANG_DIST_REL
date	twomass_psc, twomass_xsc	2MASS	The observation reference date for this source expressed in ISO standard format. (YYYY-MM-DD)	datetime	8	yyyy-mm-dd		TIME_DATE
date	twomass_scn	2MASS	The observation reference date for this scan expressed in ISO standard format. (YYYY-MM-DD)	datetime	8	yyyy-mm-dd		TIME_DATE
dateMeas	Plate	SSA	Measurement date	datetime	8	MM-DD-YYYY	12-31-9999	TIME_DATE
dbAcut	Plate	SSA	Minimum area of deblended object detection	tinyint	1	pixels		REDUCT_PARAM
dbAmax	Plate	SSA	Maximum area of parent image that can be deblended	int	4	pixels		REDUCT_PARAM
dbAmin	Plate	SSA	Minimum area of parent image that can be deblended	tinyint	1	pixels		REDUCT_PARAM
dbLevel	Plate	SSA	No. of rethresholding levels for deblending	tinyint	1			REDUCT_PARAM
dbParam	Plate	SSA	Deblending parameter	real	4			REDUCT_PARAM
dec	Detection	SSA	Celestial Declination	float	8	degrees		POS_EQ_DEC_MAIN
dec	Source	SSA	Mean Dec, computed from detections merged in this catalogue	float	8	degrees		POS_EQ_DEC_MAIN
dec	twomass_psc	2MASS	J2000 declination with respect to the ICRS	float	8	degrees		POS_EQ_DEC_MAIN
dec	twomass_scn	2MASS	Declination of scan center for equinox J2000.	float	8	degrees		POS_EQ_DEC_MAIN
dec	twomass_xsc	2MASS	Declination (J2000 decimal deg) based on peak pixel.	float	8	degrees		POS_EQ_DEC_MAIN
dec_1	twomass_scn	2MASS	J2000 declination of the eastern corner at start of scan.	float	8	degrees		POS_EQ_DEC_MAIN
dec_2	twomass_scn	2MASS	J2000 declination of the western corner at start of scan.	float	8	degrees		POS_EQ_DEC_MAIN
dec_3	twomass_scn	2MASS	J2000 declination of the eastern corner at end of scan.	float	8	degrees		POS_EQ_DEC_MAIN
dec_4	twomass_scn	2MASS	J2000 declination of the western corner at end of scan.	float	8	degrees		POS_EQ_DEC_MAIN
decCol	Plate	SSA	Name of Dec column in reference catalogue	varchar	16			REMARKS
decMax	Survey	SSA	Northern (Dec) limit of survey	float	8	degrees		POS_EQ_DEC
decMin	Survey	SSA	Southern (Dec) limit of survey	float	8	degrees		POS_EQ_DEC
decPMCol	Plate	SSA	Name of Dec proper motion column in reference catalogue	varchar	16			REMARKS
decPnt	Plate	SSA	Mean plate centre Dec	real	4	degrees		POS_EQ_DEC_MAIN
density	twomass_xsc	2MASS	Coadd log(density) of stars with k<14 mag.	real	4			PHYS_DENSITY_NUMBER
designation	twomass_psc	2MASS	Sexagesimal, equatorial position-based source name in the form: hhmmssss+ddmmsss[ABC...].	varchar	17			NAME
designation	twomass_xsc	2MASS	Source designation formed from sexigesimal coordinates.	varchar	17			NAME
directory	Plate	SSA	Name of directory in flat-file system of source data.	varchar	80			ID_FILE
dist_edge_ew	twomass_psc	2MASS	The distance from the source to the nearest East or West scan edge.	int	4	arcsec		INST_PLATE_DIST
dist_edge_ew	twomass_xsc	2MASS	The distance from the source to the nearest East or West scan edge.	smallint	2	arcsec		INST_PLATE_DIST
dist_edge_flg	twomass_psc	2MASS	Two character flag that specifies to which scan edges a source lies closest, and to which edges the dist_edge_ns and dist_edge_ew values refer.	varchar	2			INST_PLATE_DIST
dist_edge_flg	twomass_xsc	2MASS	flag indicating which edges ([n|s][e|w]) are nearest to src.	varchar	2			INST_PLATE_DIST
dist_edge_ns	twomass_psc, twomass_xsc	2MASS	The distance from the source to the nearest North or South scan edge.	int	4	arcsec		INST_PLATE_DIST
dist_opt	twomass_psc	2MASS	Distance separating TWOMASS source position and associated optical source within 5".	real	4	arcsec		INST_PLATE_DIST
distanceMins	CrossNeighbours2MASSPSC, CrossNeighbours2MASSXSC, CrossNeighboursDR2, CrossNeighboursDR5	SSA	The angular separation of the cross-neighbour	real	4	arcminutes		POS_ANG_DIST_GENERAL
distType	Plate	SSA	Radial distortion term in solution, eg. R/TAN(R)	varchar	80			MODEL_CORRECTION
domeHumid	Plate	SSA	Dome relative humidity at obsevation time	real	4			OBS_CONDITIONS
domePressure	Plate	SSA	Dome pressure at observation	real	4	mBar		OBS_CONDITIONS
domeTemp	Plate	SSA	Dome temp at observation	real	4	Kelvin		OBS_CONDITIONS
dup_src	twomass_psc, twomass_xsc	2MASS	Duplicate source flag.	smallint	2			CODE_MISC