WFCAM Science Archive

Glossary of WSA attributes

This Glossary alphabetically lists all attributes used in the UKIDSSR1 database(s) held in the WSA. If you would like to have more information about the schema tables please use the UKIDSSR1 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

C

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

c_strat twomass_scn 2MASS Flag indicating the calibration strategy for this night's data. smallint 2 CODE_MISC

calType Plate SSA Intensity calibration wedge fit type, eg. SPLINE varchar 16 INST_PARAM

CalXK Plate SSA Stationary point in profile cal. curve real 4 inst. profile mag FIT_PARAM_VALUE

camReadOut MultiframeDetector WSA Camera readout (CDS|NDR|SAR|RRR) {image extension keyword: READOUT} varchar 3 --- ??

catalogueSchema Programme WSA Script file that describes the catalogue schema varchar 64 ??

catName Multiframe WSA the filename of the associated catalogue MEF, eg. server:/path/filename.fits varchar 256 ID_CATALOG

catName iras_assoc_cats IRAS Source Name varchar 32 ID_MAIN

catNo iras_asc, iras_assoc_cats IRAS Catalog number tinyint 1 ID_CATALOG

cc_100 iras_psc IRAS point source correlation coefficient (100 micron). varchar 1 REMARKS

cc_12 iras_psc IRAS point source correlation coefficient (12 micron). varchar 1 REMARKS

cc_25 iras_psc IRAS point source correlation coefficient (25 micron). varchar 1 REMARKS

cc_60 iras_psc IRAS point source correlation coefficient (60 micron). varchar 1 REMARKS

cc_flg twomass_psc 2MASS Contamination and confusion flag. varchar 3 CODE_MISC

cc_flg twomass_xsc 2MASS indicates artifact contamination and/or confusion. varchar 1 CODE_MISC

cd11 CurrentAstrometry, PreviousAstrometry WSA Element of the linear transformation matrix (with scale) {image extension keyword: CD1_1} float 8 POS_TRANSF_PARAM

cd12 CurrentAstrometry, PreviousAstrometry WSA Element of the linear transformation matrix (with scale) {image extension keyword: CD1_2} float 8 POS_TRANSF_PARAM

cd21 CurrentAstrometry, PreviousAstrometry WSA Element of the linear transformation matrix (with scale) {image extension keyword: CD2_1} float 8 POS_TRANSF_PARAM

cd22 CurrentAstrometry, PreviousAstrometry WSA Element of the linear transformation matrix (with scale) {image extension keyword: CD2_2} float 8 POS_TRANSF_PARAM

centralDec CurrentAstrometry, PreviousAstrometry WSA Dec (J2000) at device centre float 8 Degrees POS_EQ_DEC_MAIN

centralRa CurrentAstrometry, PreviousAstrometry WSA RA (J2000) at device centre float 8 Degrees POS_EQ_RA_MAIN

centrePitch FieldSystem SSA The pitch of the field centres real 4 degrees OBS_DIFF

cEpoch Plate SSA Catalogue epoch real 4 year TIME_EPOCH

cEpTSys Plate SSA Catalogue epoch time system, eg. JULIAN varchar 16 NOTE

cEqTSys Plate SSA Catalogue equinox time system, eg. JULIAN varchar 16 NOTE

cEquinox Plate SSA Catalogue equinox real 4 year TIME_EQUINOX

chi2 Source SSA Chi-squared value of proper motion solution real 4 -0.99999995e9 FIT_CHI2

chi2 commSource, dxsSource, gcsSource, gpsSource, lasSource, udsSource WSA Chi-squared value of proper motion solution real 4 -0.9999995e9 FIT_CHI2

CIR_BVAR MultiframeDetector WSA Latest estimate of background variance {image extension keyword: CIR_BVAR} real 4 -0.9999995e9 INST_BACKGROUND

CIR_SCAL MultiframeDetector WSA Background scale relative to group maximum {image extension keyword: CIR_SCAL} real 4 -0.9999995e9 INST_BACKGROUND

CIR_ZERO MultiframeDetector WSA Pedestal value relative to group average {image extension keyword: CIR_ZERO} real 4 -0.9999995e9 FIT_PARAM_VALUE

CIRMED MultiframeDetector WSA Latest estimate of background {image extension keyword: CIRMED} real 4 -0.9999995e9 INST_BACKGROUND

cirr1 iras_psc IRAS Number of nearby 100 micron only WSDB sources tinyint 1 NUMBER

cirr2 iras_psc IRAS Spatially filtered 100 micron sky brightness ratio to flux density of point source tinyint 1 PHOT_FLUX_RATIO

cirr3 iras_psc IRAS Total 100 micron sky surface brightness smallint 2 MJy/sr PHOT_SB_IR-100

class Detection SSA Classification flag tinyint 1 CLASS_OBJECT

class calDetection, commDetection, dxsDetection, dxsListRemeasurement, gcsDetection, gcsListRemeasurement, gpsDetection, gpsListRemeasurement, lasDetection, lasListRemeasurement, udsDetection, udsListRemeasurement WSA discrete image classification flag {catalogue TType keyword: Classification} smallint 2 CLASS_MISC

class u05a18Detection WSA Flag indicating most probable morphological classification {catalogue TType keyword: Classification}
-1 stellar, +1 non--stellar, 0 noise, -2 borderline stellar, -3 boderline galaxy, -9 saturated smallint 2 CLASS_MISC

A discrete classification code for each detected image, based on various cuts on morphological parameters (see the Glossary entries for classStat and ell for further details). It is primarily based on cuts on the stellar profile statistic classStat and necessarily trades-off completeness against reliability between point-like (stellar) and extended (galaxian) images. The class assignments are as follows:

Flag Meaning

-9 Saturated

-3 Probable galaxy

-2 Probable star

-1 Star

0 Noise

+1 Galaxy

Note that the assignment of the discrete classification flag class is based on a -3.0≤class≤+2.5 (??) cut on this statistic (along with ellipticity and magnitude information??) and hence is conservative in the sense that it defines galaxy samples optimised for completeness, and conversely stellar samples optimised for reliability. For examples of the use of the various classification attributes in sample selection, especially with respect to the trade-off between completeness and reliability for stellar/galaxian samples, see the Views predefined in the WSA schema (these can be examined using the schema browser).

classB Source SSA Image classification from B band detection tinyint 1 0 CLASS_OBJECT

classI Source SSA Image classification from I band detection tinyint 1 0 CLASS_OBJECT

classMagB Source SSA B band magnitude selected by B image class real 4 mag -99.999995 PHOT_PHG_BJ

classMagI Source SSA I band magnitude selected by I image class real 4 mag -99.999995 PHOT_PHG_I

classMagR1 Source SSA R1 band magnitude selected by R1 image class real 4 mag -99.999995 PHOT_PHG_R

classMagR2 Source SSA R2 band magnitude selected by R2 image class real 4 mag -99.999995 PHOT_PHG_R

classR1 Source SSA Image classification from R1 band detection tinyint 1 0 CLASS_OBJECT

classR2 Source SSA Image classification from R2 band detection tinyint 1 0 CLASS_OBJECT

classStat calDetection, commDetection, dxsDetection, dxsListRemeasurement, gcsDetection, gcsListRemeasurement, gpsDetection, gpsListRemeasurement, lasDetection, lasListRemeasurement, udsDetection, udsListRemeasurement WSA N(0,1) stellarness-of-profile statistic {catalogue TType keyword: Statistic} real 4 STAT_PROP

classStat u05a18Detection WSA N(0,1) stellarness-of-profile statistic {catalogue TType keyword: Statistic} real 4 STAT_PROP

An equivalent N(0,1) measure of how stellar-like an image is, used in deriving the class attribute in a 'necessary but not sufficient' sense. Derived mainly from the curve-of-growth of flux using the well-defined stellar locus as a function of magnitude as a benchmark (see Irwin et al. 1994 SPIE 5493 411 for more details). Note that the assignment of the discrete classification flag class is based on a cut of -3.0≤class≤+2.5 (??) cut on this statistic (along with ellipticity and magnitude information??) and hence is conservative in the sense that it defines galaxy samples optimised for completeness, and conversely stellar samples optimised for reliability. For examples of the use of the various classification attributes in sample selection, especially with respect to the trade-off between completeness and reliability for stellar/galaxian samples, see the Views predefined in the WSA schema (these can be examined using the schema browser).

cld twomass_scn 2MASS Special flag indicating whether or not a cloud was found in the scan after comparison of its photometry to that of overlapping scans in the database. smallint 2 CODE_MISC

clip RequiredStack WSA CASU stacking tool option to perform 3-sigma (robustly estimated) clipping before stacking pixels (y/n; recommended value=y) varchar 1 ??

coadd twomass_psc 2MASS Sequence number of the Atlas Image in which the position of this source falls. smallint 2 NUMBER

coadd twomass_xsc 2MASS 3-digit coadd number (unique within scan). smallint 2 NUMBER

coadd_key twomass_psc 2MASS Unique identification number of the record in the Atlas Image Data Table (NOT YET AVAILABLE) that corresponds to Image in which the position of this source falls. int 4 ID_NUMBER

coadd_key twomass_xsc 2MASS key to coadd data record in "scan DB". int 4 ID_NUMBER

coeffA CurrentNightlyExt WSA the first-order extinction coefficient float 8 1.0 PHOT_ATM_EXT

coeffA PreviousNightlyExt WSA the first-order extinction coefficient float 8 PHOT_ATM_EXT

coeffB CurrentNightlyExt WSA the second-order extinction coefficient float 8 0.0 PHOT_ATM_EXT

coeffB PreviousNightlyExt WSA the second-order extinction coefficient float 8 PHOT_ATM_EXT

coeffC CurrentNightlyExt WSA colour dependent extinction coefficient float 8 0.0 PHOT_ATM_EXT

coeffC PreviousNightlyExt WSA colour dependent extinction coefficient float 8 PHOT_ATM_EXT

coeffs1 Plate SSA 1st coefficient of astrometric fit for XY to obs. xi,eta float 8 FIT_PARAM_VALUE

coeffs2 Plate SSA 2nd coefficient of astrometric fit for XY to obs. xi,eta float 8 FIT_PARAM_VALUE

coeffs3 Plate SSA 3rd coefficient of astrometric fit for XY to obs. xi,eta float 8 FIT_PARAM_VALUE

coeffs4 Plate SSA 4th coefficient of astrometric fit for XY to obs. xi,eta float 8 FIT_PARAM_VALUE

coeffs5 Plate SSA 5th coefficient of astrometric fit for XY to obs. xi,eta float 8 FIT_PARAM_VALUE

coeffs6 Plate SSA 6th coefficient of astrometric fit for XY to obs. xi,eta float 8 FIT_PARAM_VALUE

colour Survey SSA Survey colour, eg. blue, red or near-infrared varchar 16 OBS_BAND

combiframeID Provenance WSA the UID of the combined frame (=combiframe) bigint 8 ID_FRAME

comment ArchiveCurationHistory WSA Comment string supplied by the curator varchar 256 ??

compFile MultiframeDetector WSA Filename of the compressed image of this image frame, eg. server:/path/filename.jpg varchar 256 ID_FILE

confID Multiframe WSA UID of library calibration confidence frame {image extension keyword: CIR_CPM} bigint 8 -99999999 ID_FRAME

configIndex Multiframe WSA Configuration index {image primary HDU keyword: CNFINDEX} int 4 -99999999 SPECT_INDEX_MISC

confLimit RequiredMosaic WSA CASU mosaic tool option to override the default 10% minimum confidence level for a contributing pixel tinyint 1 percent ??

confuse_100 iras_psc IRAS Confusion flag (100 micron) tinyint 1 REMARKS

confuse_12 iras_psc IRAS Confusion flag (12 micron) tinyint 1 REMARKS

confuse_25 iras_psc IRAS Confusion flag (25 micron) tinyint 1 REMARKS

confuse_60 iras_psc IRAS Confusion flag (60 micron) tinyint 1 REMARKS

contam_flg twomass_xsc 2MASS contamination flag: 0=no stars, 1=stellar flux incl. in mag. smallint 2 CODE_MISC

cosmag Detection SSA Isophotal magnitude real 4 instrumental units PHOT_PHG_MAG

creationDate DifferenceImage, MosaicImage, StackImage WSA the date that this difference image was created in the format MM-DD-YYYY-Thh.mm.ss datetime 8 MM-DD-YYYY-Thh.mm.ss TIME_DATE

creationDate MultiframeDetector WSA Creation date/time of file {catalogue extension keyword: DATE} datetime 8 MM-DD-YYYY:hh:mm:ss.sss 12-31-9999 ??

crowd RequiredMosaic, RequiredStack WSA CASU source extraction tool option to switch on/off (1/0) crowded field analysis (recommended value=1) tinyint 1 0 ??

crPixX CurrentAstrometry, PreviousAstrometry WSA Pixel coordinate of the reference point on axis 1 {image extension keyword: CRPIX1} float 8 pixels POS_CCD_X

crPixY CurrentAstrometry, PreviousAstrometry WSA Pixel coordinate of the reference point on axis 2 {image extension keyword: CRPIX2} float 8 pixels POS_CCD_Y

crValX CurrentAstrometry, PreviousAstrometry WSA Coordinate value at reference point on axis 1 {image extension keyword: CRVAL1} float 8 POS_CCD_X

crValY CurrentAstrometry, PreviousAstrometry WSA Coordinate value at reference point on axis 2 {image extension keyword: CRVAL2} float 8 POS_CCD_Y

cTypeX CurrentAstrometry, PreviousAstrometry WSA G&C WCS type, eg 'RA---ZPN' {image extension keyword: CTYPE1} varchar 8 POS_EQ_RA_MAIN

cTypeY CurrentAstrometry, PreviousAstrometry WSA G&C WCS type, eg 'DEC--ZPN' {image extension keyword: CTYPE2} varchar 8 POS_EQ_DEC_MAIN

cubicDist Plate SSA Cubic coefficient of radial distortion float 8 FIT_PARAM_VALUE

cuEventID ArchiveCurationHistory, ProgrammeFrame WSA UID of the curation event int 4 ID_MAIN

cuEventID AstrCalVers, CurrentAstrometry, CurrentNightlyExt, CurrentNightlyZP, calDetection, calMergeLog, commDetection, commMergeLog, commSource, DetectorSetUp, DifferenceImage, dxsDetection, dxsListRemeasurement, dxsMergeLog, dxsSource, dxsSourceRemeasurement, gcsDetection, gcsListRemeasurement, gcsMergeLog, gcsSource, gcsSourceRemeasurement, gpsDetection, gpsListRemeasurement, gpsMergeLog, gpsSource, gpsSourceRemeasurement, lasDetection, lasListRemeasurement, lasMergeLog, lasSource, lasSourceRemeasurement, MosaicImage, MultiframeDetector, MultiframeSetUp, PhotCalVers, PreviousAstrometry, PreviousNightlyExt, PreviousNightlyZP, Provenance, StackImage, u05a18Detection, udsDetection, udsListRemeasurement, udsMergeLog, udsSource, udsSourceRemeasurement WSA UID of curation event giving rise to this record int 4 REFER_CODE

cuEventID Multiframe WSA UID of curation event yielding ingest of these data int 4 REFER_CODE

cuEventID ProgrammeCurationHistory WSA the unique curation event ID int 4 ID_MAIN

cuID ArchiveCurationHistory WSA the unique curation task ID smallint 2 ID_MISC

cuID CurationTask, RequiredCurationTask WSA the unique curation task ID smallint 2 ID_MAIN

curator ArchiveCurationHistory WSA The archive curation scientist responsible for this event varchar 16 ??

cutOff Filter WSA The 50% cut-off wavelength of the filter real 4 microns ??

cutOn Filter WSA The 50% cut-on wavelength of the filter real 4 microns ??

cx CurrentAstrometry, calDetection, commDetection, commSource, dxsDetection, dxsListRemeasurement, dxsSource, dxsSourceRemeasurement, gcsDetection, gcsListRemeasurement, gcsSource, gcsSourceRemeasurement, gpsDetection, gpsListRemeasurement, gpsSource, gpsSourceRemeasurement, lasDetection, lasListRemeasurement, lasSource, lasSourceRemeasurement, PreviousAstrometry, u05a18Detection, udsDetection, udsListRemeasurement, udsSource, udsSourceRemeasurement WSA unit vector of spherical co-ordinate float 8 POS_EQ_X

cx Detection, Field, Source SSA Cartesian x of unit (ra,dec) vector on celestial sphere float 8 POS_EQ_X

cx calMergeLog, commMergeLog, dxsMergeLog, gcsMergeLog, gpsMergeLog, lasMergeLog, udsMergeLog WSA unit vector of spherical co-ordinates float 8 POS_EQ_X

cx firstSource FIRST unit vector of spherical co-ordinate float 8 POS_EQ_X

cx iras_psc IRAS unit vector of spherical co-ordinate float 8 POS_EQ_X

cx rosat_bsc, rosat_fsc ROSAT unit vector of spherical co-ordinate float 8 POS_EQ_X

cx twomass_psc 2MASS unit vector of spherical co-ordinate float 8 POS_EQ_X

cx twomass_scn, twomass_xsc 2MASS unit vector of spherical co-ordinate POS_EQ_X float 8 POS_EQ_X

cy CurrentAstrometry, calDetection, commDetection, commSource, dxsDetection, dxsListRemeasurement, dxsSource, dxsSourceRemeasurement, gcsDetection, gcsListRemeasurement, gcsSource, gcsSourceRemeasurement, gpsDetection, gpsListRemeasurement, gpsSource, gpsSourceRemeasurement, lasDetection, lasListRemeasurement, lasSource, lasSourceRemeasurement, PreviousAstrometry, u05a18Detection, udsDetection, udsListRemeasurement, udsSource, udsSourceRemeasurement WSA unit vector of spherical co-ordinate float 8 POS_EQ_Y

cy Detection, Field, Source SSA Cartesian y of unit (ra,dec) vector on celestial sphere float 8 POS_EQ_Y

cy calMergeLog, commMergeLog, dxsMergeLog, gcsMergeLog, gpsMergeLog, lasMergeLog, udsMergeLog WSA unit vector of spherical co-ordinates float 8 POS_EQ_Y

cy firstSource FIRST unit vector of spherical co-ordinate float 8 POS_EQ_Y

cy iras_psc IRAS unit vector of spherical co-ordinate float 8 POS_EQ_Y

cy rosat_bsc, rosat_fsc ROSAT unit vector of spherical co-ordinate float 8 POS_EQ_Y

cy twomass_psc 2MASS unit vector of spherical co-ordinate float 8 POS_EQ_Y

cy twomass_scn, twomass_xsc 2MASS unit vector of spherical co-ordinate POS_EQ_Y float 8 POS_EQ_Y

cz CurrentAstrometry, calDetection, commDetection, commSource, dxsDetection, dxsListRemeasurement, dxsSource, dxsSourceRemeasurement, gcsDetection, gcsListRemeasurement, gcsSource, gcsSourceRemeasurement, gpsDetection, gpsListRemeasurement, gpsSource, gpsSourceRemeasurement, lasDetection, lasListRemeasurement, lasSource, lasSourceRemeasurement, PreviousAstrometry, u05a18Detection, udsDetection, udsListRemeasurement, udsSource, udsSourceRemeasurement WSA unit vector of spherical co-ordinate float 8 POS_EQ_Z

cz Detection, Field, Source SSA Cartesian z of unit (ra,dec) vector on celestial sphere float 8 POS_EQ_Z

cz calMergeLog, commMergeLog, dxsMergeLog, gcsMergeLog, gpsMergeLog, lasMergeLog, udsMergeLog WSA unit vector of spherical co-ordinates float 8 POS_EQ_Z

cz firstSource FIRST unit vector of spherical co-ordinate float 8 POS_EQ_Z

cz iras_psc IRAS unit vector of spherical co-ordinate float 8 POS_EQ_Z

cz rosat_bsc, rosat_fsc ROSAT unit vector of spherical co-ordinate float 8 POS_EQ_Z

cz twomass_psc 2MASS unit vector of spherical co-ordinate float 8 POS_EQ_Z

cz twomass_scn, twomass_xsc 2MASS unit vector of spherical co-ordinate POS_EQ_Z float 8 POS_EQ_Z

WFAU, Institute for Astronomy,
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wsa-support@roe.ac.uk
27/01/2009