SuperCOSMOS Science Archive

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

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Name Schema Table Database Description Type Length Unit Default Value Unified Content Descriptor

e_score twomass_xsc 2MASS extended score: 1(extended) < e_score < 2(point-like). real 4 CODE_MISC

Ebmv Source PSSA The estimated foreground reddening at this position from Schlegel et al. (1998) real 4 mag PHOT_EXTINCTION_GAL

Ebmv Source SSA The estimated foreground reddening at this position from Schlegel et al. (1998) real 4 mag PHOT_EXTINCTION_GAL

ebv twompzPhotoz TWOMPZ The Galactic dust extinction value measured from the Schlegel, Finkbeiner & Davis (1998) maps. {image primary HDU keyword: EBV} real 4 mag -0.9999995e9 phys.absorption.gal

ebv wiseScosPhotoz, wiseScosPhotozRejects, wiseScosSvm WISExSCOSPZ The Galactic dust extinction value measured from the Schlegel, Finkbeiner & Davis (1998) maps. {image primary HDU keyword: Ebmv} real 4 mag -0.9999995e9 phys.absorption.gal

ellfit_flg twomass_xsc 2MASS ellipse fitting contamination flag. smallint 2 CODE_MISC

ellipB Source F287 Ellipticity of B band detection real 4 -0.99999995e9 PHYS_ELLIPTICITY

ellipB Source PSSA Ellipticity of B band detection real 4 -0.99999995e9 PHYS_ELLIPTICITY

ellipB Source SSA Ellipticity of B band detection real 4 -0.99999995e9 PHYS_ELLIPTICITY

ellipI Source F287 Ellipticity of I band detection real 4 -0.99999995e9 PHYS_ELLIPTICITY

ellipI Source PSSA Ellipticity of I band detection real 4 -0.99999995e9 PHYS_ELLIPTICITY

ellipI Source SSA Ellipticity of I band detection real 4 -0.99999995e9 PHYS_ELLIPTICITY

ellipMax Plate F287 Maximum object ellipticity in IAM file real 4 -0.99999995e9 PHYS_ELLIPTICITY

ellipMax Plate PSSA Maximum object ellipticity in IAM file real 4 PHYS_ELLIPTICITY

ellipMax Plate SSA Maximum object ellipticity in IAM file real 4 PHYS_ELLIPTICITY

ellipMean Plate F287 Mean object ellipticity in IAM file real 4 -0.99999995e9 PHYS_ELLIPTICITY

ellipMean Plate PSSA Mean object ellipticity in IAM file real 4 PHYS_ELLIPTICITY

ellipMean Plate SSA Mean object ellipticity in IAM file real 4 PHYS_ELLIPTICITY

ellipMed Plate F287 Median ellipticity in IAM file real 4 -0.99999995e9 PHYS_ELLIPTICITY

ellipMed Plate PSSA Median ellipticity in IAM file real 4 PHYS_ELLIPTICITY

ellipMed Plate SSA Median ellipticity in IAM file real 4 PHYS_ELLIPTICITY

ellipMin Plate F287 Minimum object ellipticity in IAM file real 4 -0.99999995e9 PHYS_ELLIPTICITY

ellipMin Plate PSSA Minimum object ellipticity in IAM file real 4 PHYS_ELLIPTICITY

ellipMin Plate SSA Minimum object ellipticity in IAM file real 4 PHYS_ELLIPTICITY

ellipMode Plate F287 Modal object ellipticity in IAM file real 4 -0.99999995e9 PHYS_ELLIPTICITY

ellipMode Plate PSSA Modal object ellipticity in IAM file real 4 PHYS_ELLIPTICITY

ellipMode Plate SSA Modal object ellipticity in IAM file real 4 PHYS_ELLIPTICITY

ellipR Source F287 Ellipticity of R band detection real 4 -0.99999995e9 PHYS_ELLIPTICITY

ellipR1 Source PSSA Ellipticity of R1 band detection real 4 -0.99999995e9 PHYS_ELLIPTICITY

ellipR1 Source SSA Ellipticity of R1 band detection real 4 -0.99999995e9 PHYS_ELLIPTICITY

ellipR2 Source PSSA Ellipticity of R2 band detection real 4 -0.99999995e9 PHYS_ELLIPTICITY

ellipR2 Source SSA Ellipticity of R2 band detection real 4 -0.99999995e9 PHYS_ELLIPTICITY

ellipU Source F287 Ellipticity of U band detection real 4 -0.99999995e9 PHYS_ELLIPTICITY

emulpos Plate F287 SuperCOSMOS emulsion position, eg. up varchar 4 None INST_PARAM

emulpos Plate PSSA SuperCOSMOS emulsion position, eg. up varchar 4 INST_PARAM

emulpos Plate SSA SuperCOSMOS emulsion position, eg. up varchar 4 INST_PARAM

emulsion Plate PSSA Kodak emulsion type, eg. 103a-E, IIIa-J, IV-N varchar 8 INST_PLATE_EMULSION

emulsion Plate SSA Kodak emulsion type, eg. 103a-E, IIIa-J, IV-N varchar 8 INST_PLATE_EMULSION

endDate IsoCalVersion PSSA End date at which the calibration was superseded datetime 8 MM-DD-YYYY 12-31-9999 TIME_DATE

endDate IsoCalVersion SSA End date at which the calibration was superseded datetime 8 MM-DD-YYYY 12-31-9999 TIME_DATE

epoch Plate F287 Epoch of observation real 4 years -0.99999995e9 TIME_EPOCH

epoch Plate PSSA Epoch of observation real 4 years TIME_EPOCH

epoch Plate SSA Epoch of observation real 4 years TIME_EPOCH

epoch Source PSSA Epoch of position (variance weighted mean epoch of available measures) real 4 year TIME_EPOCH

epoch Source SSA Epoch of position (variance weighted mean epoch of available measures) real 4 year TIME_EPOCH

epochMax Survey PSSA Maximum epoch of observations real 4 year TIME_EPOCH

epochMax Survey SSA Maximum epoch of observations real 4 year TIME_EPOCH

epochMin Survey PSSA Minimum epoch of observations real 4 year TIME_EPOCH

epochMin Survey SSA Minimum epoch of observations real 4 year TIME_EPOCH

epTsys Survey PSSA Time system for epoch values in SurveyCatalog varchar 16 NOTE

epTsys Survey SSA Time system for epoch values in SurveyCatalog varchar 16 NOTE

eqTsys Plate F287 Time system of equinox, eg. BESSELIAN varchar 12 None NOTE

eqTsys Plate PSSA Time system of equinox, eg. BESSELIAN varchar 12 NOTE

eqTsys Plate SSA Time system of equinox, eg. BESSELIAN varchar 12 NOTE

eqTsys Survey PSSA Time system for equinox in SurveyCatalog varchar 16 NOTE

eqTsys Survey SSA Time system for equinox in SurveyCatalog varchar 16 NOTE

equinox Plate F287 Equinox of raPnt and decPnt real 4 year -0.99999995e9 TIME_EQUINOX

equinox Plate PSSA Equinox of raPnt and decPnt real 4 year TIME_EQUINOX

equinox Plate SSA Equinox of raPnt and decPnt real 4 year TIME_EQUINOX

equinox Survey PSSA Equinox for positions in SurveyCatalog real 4 year TIME_EQUINOX

equinox Survey SSA Equinox for positions in SurveyCatalog real 4 year TIME_EQUINOX

equinRef Plate F287 Equinox of refstar positions real 4 -0.99999995e9 TIME_EQUINOX

equinRef Plate PSSA Equinox of refstar positions real 4 TIME_EQUINOX

equinRef Plate SSA Equinox of refstar positions real 4 TIME_EQUINOX

err_ang twomass_psc 2MASS Position angle on the sky of the semi-major axis of the position uncertainty ellipse (East of North) smallint 2 degrees POS_POS-ANG

err_ang twomass_sixx2_psc 2MASS angle of error ellipse major axis (E of N) smallint 2 deg

err_maj twomass_psc 2MASS Semi-major axis length of the one sigma position uncertainty ellipse real 4 arcsec EXTENSION_RAD

err_maj twomass_sixx2_psc 2MASS major axis of 1-sigma error ellipse real 4 arcsec

err_min twomass_psc 2MASS Semi-minor axis length of the one sigma position uncertainty ellipse real 4 arcsec EXTENSION_RAD

err_min twomass_sixx2_psc 2MASS minor axis of 1-sigma error ellipse real 4 arcsec

event Quality F287 Descriptions of the events text -1 None

expLength Plate F287 Exposure time real 4 minutes -0.99999995e9 TIME_EXPTIME

expLength Plate PSSA Exposure time real 4 minutes TIME_EXPTIME

expLength Plate SSA Exposure time real 4 minutes TIME_EXPTIME

ext_key twomass_psc 2MASS Unique identification number of the record in the XSC that corresponds to this point source. int 4 ID_NUMBER

ext_key twomass_xsc 2MASS entry counter (key) number (unique within table). int 4 ID_NUMBER

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Name	Schema Table	Database	Description	Type	Length	Unit	Default Value	Unified Content Descriptor
e_score	twomass_xsc	2MASS	extended score: 1(extended) < e_score < 2(point-like).	real	4			CODE_MISC
Ebmv	Source	PSSA	The estimated foreground reddening at this position from Schlegel et al. (1998)	real	4	mag		PHOT_EXTINCTION_GAL
Ebmv	Source	SSA	The estimated foreground reddening at this position from Schlegel et al. (1998)	real	4	mag		PHOT_EXTINCTION_GAL
ebv	twompzPhotoz	TWOMPZ	The Galactic dust extinction value measured from the Schlegel, Finkbeiner & Davis (1998) maps. {image primary HDU keyword: EBV}	real	4	mag	-0.9999995e9	phys.absorption.gal
ebv	wiseScosPhotoz, wiseScosPhotozRejects, wiseScosSvm	WISExSCOSPZ	The Galactic dust extinction value measured from the Schlegel, Finkbeiner & Davis (1998) maps. {image primary HDU keyword: Ebmv}	real	4	mag	-0.9999995e9	phys.absorption.gal
ellfit_flg	twomass_xsc	2MASS	ellipse fitting contamination flag.	smallint	2			CODE_MISC
ellipB	Source	F287	Ellipticity of B band detection	real	4		-0.99999995e9	PHYS_ELLIPTICITY
ellipB	Source	PSSA	Ellipticity of B band detection	real	4		-0.99999995e9	PHYS_ELLIPTICITY
ellipB	Source	SSA	Ellipticity of B band detection	real	4		-0.99999995e9	PHYS_ELLIPTICITY
ellipI	Source	F287	Ellipticity of I band detection	real	4		-0.99999995e9	PHYS_ELLIPTICITY
ellipI	Source	PSSA	Ellipticity of I band detection	real	4		-0.99999995e9	PHYS_ELLIPTICITY
ellipI	Source	SSA	Ellipticity of I band detection	real	4		-0.99999995e9	PHYS_ELLIPTICITY
ellipMax	Plate	F287	Maximum object ellipticity in IAM file	real	4		-0.99999995e9	PHYS_ELLIPTICITY
ellipMax	Plate	PSSA	Maximum object ellipticity in IAM file	real	4			PHYS_ELLIPTICITY
ellipMax	Plate	SSA	Maximum object ellipticity in IAM file	real	4			PHYS_ELLIPTICITY
ellipMean	Plate	F287	Mean object ellipticity in IAM file	real	4		-0.99999995e9	PHYS_ELLIPTICITY
ellipMean	Plate	PSSA	Mean object ellipticity in IAM file	real	4			PHYS_ELLIPTICITY
ellipMean	Plate	SSA	Mean object ellipticity in IAM file	real	4			PHYS_ELLIPTICITY
ellipMed	Plate	F287	Median ellipticity in IAM file	real	4		-0.99999995e9	PHYS_ELLIPTICITY
ellipMed	Plate	PSSA	Median ellipticity in IAM file	real	4			PHYS_ELLIPTICITY
ellipMed	Plate	SSA	Median ellipticity in IAM file	real	4			PHYS_ELLIPTICITY
ellipMin	Plate	F287	Minimum object ellipticity in IAM file	real	4		-0.99999995e9	PHYS_ELLIPTICITY
ellipMin	Plate	PSSA	Minimum object ellipticity in IAM file	real	4			PHYS_ELLIPTICITY
ellipMin	Plate	SSA	Minimum object ellipticity in IAM file	real	4			PHYS_ELLIPTICITY
ellipMode	Plate	F287	Modal object ellipticity in IAM file	real	4		-0.99999995e9	PHYS_ELLIPTICITY
ellipMode	Plate	PSSA	Modal object ellipticity in IAM file	real	4			PHYS_ELLIPTICITY
ellipMode	Plate	SSA	Modal object ellipticity in IAM file	real	4			PHYS_ELLIPTICITY
ellipR	Source	F287	Ellipticity of R band detection	real	4		-0.99999995e9	PHYS_ELLIPTICITY
ellipR1	Source	PSSA	Ellipticity of R1 band detection	real	4		-0.99999995e9	PHYS_ELLIPTICITY
ellipR1	Source	SSA	Ellipticity of R1 band detection	real	4		-0.99999995e9	PHYS_ELLIPTICITY
ellipR2	Source	PSSA	Ellipticity of R2 band detection	real	4		-0.99999995e9	PHYS_ELLIPTICITY
ellipR2	Source	SSA	Ellipticity of R2 band detection	real	4		-0.99999995e9	PHYS_ELLIPTICITY
ellipU	Source	F287	Ellipticity of U band detection	real	4		-0.99999995e9	PHYS_ELLIPTICITY
emulpos	Plate	F287	SuperCOSMOS emulsion position, eg. up	varchar	4		None	INST_PARAM
emulpos	Plate	PSSA	SuperCOSMOS emulsion position, eg. up	varchar	4			INST_PARAM
emulpos	Plate	SSA	SuperCOSMOS emulsion position, eg. up	varchar	4			INST_PARAM
emulsion	Plate	PSSA	Kodak emulsion type, eg. 103a-E, IIIa-J, IV-N	varchar	8			INST_PLATE_EMULSION
emulsion	Plate	SSA	Kodak emulsion type, eg. 103a-E, IIIa-J, IV-N	varchar	8			INST_PLATE_EMULSION
endDate	IsoCalVersion	PSSA	End date at which the calibration was superseded	datetime	8	MM-DD-YYYY	12-31-9999	TIME_DATE
endDate	IsoCalVersion	SSA	End date at which the calibration was superseded	datetime	8	MM-DD-YYYY	12-31-9999	TIME_DATE
epoch	Plate	F287	Epoch of observation	real	4	years	-0.99999995e9	TIME_EPOCH
epoch	Plate	PSSA	Epoch of observation	real	4	years		TIME_EPOCH
epoch	Plate	SSA	Epoch of observation	real	4	years		TIME_EPOCH
epoch	Source	PSSA	Epoch of position (variance weighted mean epoch of available measures)	real	4	year		TIME_EPOCH
epoch	Source	SSA	Epoch of position (variance weighted mean epoch of available measures)	real	4	year		TIME_EPOCH
epochMax	Survey	PSSA	Maximum epoch of observations	real	4	year		TIME_EPOCH
epochMax	Survey	SSA	Maximum epoch of observations	real	4	year		TIME_EPOCH
epochMin	Survey	PSSA	Minimum epoch of observations	real	4	year		TIME_EPOCH
epochMin	Survey	SSA	Minimum epoch of observations	real	4	year		TIME_EPOCH
epTsys	Survey	PSSA	Time system for epoch values in SurveyCatalog	varchar	16			NOTE
epTsys	Survey	SSA	Time system for epoch values in SurveyCatalog	varchar	16			NOTE
eqTsys	Plate	F287	Time system of equinox, eg. BESSELIAN	varchar	12		None	NOTE
eqTsys	Plate	PSSA	Time system of equinox, eg. BESSELIAN	varchar	12			NOTE
eqTsys	Plate	SSA	Time system of equinox, eg. BESSELIAN	varchar	12			NOTE
eqTsys	Survey	PSSA	Time system for equinox in SurveyCatalog	varchar	16			NOTE
eqTsys	Survey	SSA	Time system for equinox in SurveyCatalog	varchar	16			NOTE
equinox	Plate	F287	Equinox of raPnt and decPnt	real	4	year	-0.99999995e9	TIME_EQUINOX
equinox	Plate	PSSA	Equinox of raPnt and decPnt	real	4	year		TIME_EQUINOX
equinox	Plate	SSA	Equinox of raPnt and decPnt	real	4	year		TIME_EQUINOX
equinox	Survey	PSSA	Equinox for positions in SurveyCatalog	real	4	year		TIME_EQUINOX
equinox	Survey	SSA	Equinox for positions in SurveyCatalog	real	4	year		TIME_EQUINOX
equinRef	Plate	F287	Equinox of refstar positions	real	4		-0.99999995e9	TIME_EQUINOX
equinRef	Plate	PSSA	Equinox of refstar positions	real	4			TIME_EQUINOX
equinRef	Plate	SSA	Equinox of refstar positions	real	4			TIME_EQUINOX
err_ang	twomass_psc	2MASS	Position angle on the sky of the semi-major axis of the position uncertainty ellipse (East of North)	smallint	2	degrees		POS_POS-ANG
err_ang	twomass_sixx2_psc	2MASS	angle of error ellipse major axis (E of N)	smallint	2	deg
err_maj	twomass_psc	2MASS	Semi-major axis length of the one sigma position uncertainty ellipse	real	4	arcsec		EXTENSION_RAD
err_maj	twomass_sixx2_psc	2MASS	major axis of 1-sigma error ellipse	real	4	arcsec
err_min	twomass_psc	2MASS	Semi-minor axis length of the one sigma position uncertainty ellipse	real	4	arcsec		EXTENSION_RAD
err_min	twomass_sixx2_psc	2MASS	minor axis of 1-sigma error ellipse	real	4	arcsec
event	Quality	F287	Descriptions of the events	text	-1		None
expLength	Plate	F287	Exposure time	real	4	minutes	-0.99999995e9	TIME_EXPTIME
expLength	Plate	PSSA	Exposure time	real	4	minutes		TIME_EXPTIME
expLength	Plate	SSA	Exposure time	real	4	minutes		TIME_EXPTIME
ext_key	twomass_psc	2MASS	Unique identification number of the record in the XSC that corresponds to this point source.	int	4			ID_NUMBER
ext_key	twomass_xsc	2MASS	entry counter (key) number (unique within table).	int	4			ID_NUMBER

WFAU, Institute for Astronomy,
Royal Observatory, Blackford Hill
Edinburgh, EH9 3HJ, UK

mar@roe.ac.uk
16/01/2026

Glossary of SSA attributes

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

E