WSA Browser

Glossary of WSA attributes

This Glossary alphabetically lists all attributes used in the UKIDSSDR11 database(s) held in the WSA. If you would like to have more information about the schema tables please use the UKIDSSDR11 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

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, gcsVariability, gpsVariability, lasVariability, 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.

variableClass uhsVariability WSAUHS 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 MapFrameStatus WSA Version number of the catalogue smallint 2 -9999

versionNum MapFrameStatus WSAUHS Version number of the catalogue smallint 2 -9999

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.

versionNum lasMapRemeasAver WSA Version number of the catalogue smallint 2

versionNum lasMapRemeasurement WSA Version number of the catalogue {catalogue extension keyword: VERSNUM} smallint 2

versNum AstrCalVers WSACalib Version number of current astrometric solution int 4 meta.software

versNum AstrCalVers WSATransit Version number of current astrometric solution int 4 meta.software

versNum AstrCalVers WSAUHS Version number of current astrometric solution int 4 meta.software

versNum AstrCalVers, PreviousAstrometry WSA Version number of current astrometric solution int 4 meta.software

versNum PhotCalVers WSACalib the version number of the calibration int 4 meta.software

versNum PhotCalVers WSATransit the version number of the calibration int 4 meta.software

versNum PhotCalVers WSAUHS the version number of the calibration int 4 meta.software

versNum PhotCalVers, PreviousMFDZP WSA 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

visibility_periods_used gaia_source GAIADR2 Number of visibility periods uased in the astrometric solution smallint 2 meta.number

visibility_periods_used gaia_source GAIAEDR3 Number of visibility periods uased in the astrometric solution smallint 2 meta.number

vMag ukirtFSstars WSA V band total magnitude real 4 mag -0.9999995e9 phot.mag

vMag ukirtFSstars WSACalib V band total magnitude real 4 mag -0.9999995e9 phot.mag

vMag ukirtFSstars WSAUHS V band total magnitude real 4 mag -0.9999995e9 phot.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

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

wsa-support@roe.ac.uk
17/01/2022