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Glossary of WSA attributes

This Glossary alphabetically lists all attributes used in the UKIDSSDR10 database(s) held in the WSA. If you would like to have more information about the schema tables please use the UKIDSSDR10 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

NameSchema TableDatabaseDescriptionTypeLengthUnitDefault ValueUnified Content Descriptor
v_i hipparcos_new_reduction GAIADR1 V-I colour index float 8 mag   phot.color;em.opt.V;em.opt.I
va hipparcos_new_reduction GAIADR1 Reference to variability annex int 4     meta.note
var hipparcos_new_reduction GAIADR1 Cosmic dispersion added (stochastc solution) float 8     stat.fit.residual
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_EXP_ID xmm3dr4 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 50      
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_FLAG xmm3dr4 XMM The flag is set to 1 if this source was detected as variable (Chi² probability < 1E-5, see PN_CHI2PROB, M1_CHI2PROB, M2_CHI2PROB) in at least one exposure. bit 1      
var_flg allwise_sc WISE Variability flag. The variability flag is a four-character string, one character per band, in which the value for each band is related to the probability that the source flux measured on the individual WISE exposures was not constant with time. The probability calculation uses the standard deviation of the single exposure flux measurements, w?sigp1, as well as the band-to-band flux correlation significance, q12,q23,q34. CAUTION: Estimation of flux variability is unreliable for sources that are extended (ext_flg>0), and sources whose measurements are contaminated by image artifacts in a band (cc_flags[b] != '0'). varchar 4      
The probability is computed for a band only when there are at least six single-exposure measurements available that satisfy minimum quality criteria. A value of "n" in a band indicates insufficient or inadequate data to make a determination of possible variability. Values of "0" through "9" indicate increasing probabilities of variation. Values of "0" through "5" are most likely not variables. Sources with values of "6" and "7" are likely flux variables, but are the most susceptible to false-positive variability. Var_flg values greater than "7" have the highest probability of being true flux variables in a band.
var_flg wise_allskysc WISE Variability flag.
The variability flag is a four-character string, one character per band, in which the value for each band is related to the probability that the source flux measured on the individual WISE exposures was not constant with time.
char 4   NONE  
var_flg wise_prelimsc WISE Variability flag
The variability flag is a four-character string, one character per band, in which the value for each band is related to the probability that the source flux measured on the individual WISE exposures was not constant with time
char 4   NONE  
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      
VAR_INST_ID xmm3dr4 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 50      
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     ??
variabilityTable Programme WSAUHS 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  
vegaToAB Filter WSAUHS 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 meta.id
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 meta.id
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 meta.id
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 WSAUHS a version number for this frame (if available) real 4   -0.9999995e9 meta.id
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 WSA Version number of current astrometric solution int 4     ID_VERSION
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 WSAUHS Version number of current astrometric solution int 4     ID_VERSION
versNum PhotCalVers WSA the version number of the calibration 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 WSAUHS the version number of the calibration int 4     ID_VERSION
versNum PreviousAstrometry WSA Version number of current astrometric solution int 4     meta.software
versNum PreviousAstrometry WSACalib Version number of current astrometric solution int 4     meta.software
versNum PreviousAstrometry WSATransit Version number of current astrometric solution int 4     meta.software
versNum PreviousAstrometry WSAUHS Version number of current astrometric solution int 4     meta.software
versNum PreviousMFDZP WSA the version number of the calibration int 4     meta.software
versNum PreviousMFDZP WSACalib the version number of the calibration int 4     meta.software
versNum PreviousMFDZP WSAUHS the version number of the calibration int 4     meta.software
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
vMag ukirtFSstars WSAUHS 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
vt_mag tycho2 GAIADR1 Tycho2 VT magnitude real 4 mag   phot.mag;em.opt.V



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07/11/2017