TABLE  vikingVariability

Contains statistical analysis of VIKING primary sources.

Photometric variability statistics. Astrometric fit to all data
Variability statistics in J bands calculated from
matches in vikingSourceXDetectionBestMatch

Required constraints:
  • Primary key is (sourceID)
  • (frameSetID) references vikingMergeLog(frameSetID)

NameTypeLengthUnitDescriptionDefault ValueUnified Content Descriptor
sourceIDbigint8 UID (unique over entire VSA via programme ID prefix) of this merged detection as assigned by merge algorithm meta.id;meta.main
cuEventIDint4 UID of curation event giving rise to this record meta.bib
frameSetID link to glossarybigint8 frame set ID, unique over the whole VSA via programme ID prefix, assigned by merging procedure meta.id;obs.field
ra link to glossaryfloat8DegreesMean Right Ascension pos.eq.ra;meta.main
dec link to glossaryfloat8DegreesMean Declination pos.eq.dec;meta.main
sigRa link to glossaryreal4DegreesUncertainty in mean RA-0.9999995e9stat.error
sigDec link to glossaryreal4DegreesUncertainty in mean Dec-0.9999995e9stat.error
expAstErr link to glossaryreal4arcsecRms calculated from polynomial fit to minimum astrometric RMS as a function of magnitude-0.9999995e9stat.error
epoch link to glossaryfloat8YearsEpoch of measurement time.epoch
muRa link to glossaryreal4mas/yrProper motion in RA-0.9999995e9pos.eq.ra;pos.pm
muDec link to glossaryreal4mas/yrProper motion in Dec-0.9999995e9pos.eq.dec;pos.pm
sigMuRa link to glossaryreal4mas/yrError on proper motion in RA-0.9999995e9stat.error
sigMuDec link to glossaryreal4mas/yrError on proper motion in Dec-0.9999995e9stat.error
parallax link to glossaryreal4masParallax of star-0.9999995e9pos.parallax
minPllx link to glossaryreal4masLower limit of 90% confidence interval for parallax measurement-0.9999995e9pos.parallax;stat.min
maxPllx link to glossaryreal4masUpper limit of 90% confidence interval for parallax measurement-0.9999995e9pos.parallax;stat.max
chi2 link to glossaryreal4 Chi-squared value of astrometric solution-0.9999995e9stat.fit.chi2
nFrames link to glossaryint4 Number of frames with good detections used to calculate astrometric fits0meta.number
jnGoodObs link to glossaryint4 Number of good detections in J band0meta.number;em.IR.J
jnFlaggedObs link to glossaryint4 Number of detections in J band flagged as potentially spurious by vikingDetection.ppErrBits0meta.number;em.IR.J
jnMissingObs link to glossaryint4 Number of J band frames that this object should have been detected on and was not0meta.number;em.IR.J
jbestAper link to glossaryint4 Best aperture (1-6) for photometric statistics in the J band-9999meta.code.class;em.IR.J
jminCadence link to glossaryreal4daysminimum gap between observations-0.9999995e9time.interval;obs;stat.min
jmedCadence link to glossaryreal4daysmedian gap between observations-0.9999995e9time.interval;obs;stat.median
jmaxCadence link to glossaryreal4daysmaximum gap between observations-0.9999995e9time.interval;obs;stat.max
jtotalPeriod link to glossaryreal4daystotal period of observations (last obs-first obs)-0.9999995e9time.duration
jmeanMag link to glossaryreal4magMean J magnitude-0.9999995e9phot.mag;em.IR.J;stat.mean;em.IR.J
jmedianMag link to glossaryreal4magMedian J magnitude-0.9999995e9phot.mag;em.IR.J;stat.median;em.IR.J
jMagRms link to glossaryreal4magrms of J magnitude-0.9999995e9stat.error;phot.mag;em.IR.J
jMagMAD link to glossaryreal4magMedian Absolute Deviation of J magnitude-0.9999995e9stat.err;em.IR.J;phot.mag
jskewness link to glossaryreal4magSkewness in J band (see Sesar et al. 2007)-0.9999995e9stat.param;em.IR.J
jMinMag link to glossaryreal4magMinimum magnitude in J band, of good detections-0.9999995e9phot.mag;em.IR.J;stat.min
jMaxMag link to glossaryreal4magMaximum magnitude in J band, of good detections-0.9999995e9phot.mag;em.IR.J;stat.max
jNgt3sig link to glossarysmallint2 Number of good detections in J-band that are more than 3 sigma deviations (jAperMagN < (jMeanMag-3*jMagRms)-9999meta.number;em.IR.J
jExpRms link to glossaryreal4magRms calculated from polynomial fit to modal RMS as a function of magnitude in J band-0.9999995e9stat.error;em.IR.J
jIntRms link to glossaryreal4magIntrinsic rms in J-band-0.9999995e9stat.error;em.IR.J
jchiSqpd link to glossaryreal4 Chi square (per degree of freedom) fit to data (mean and expected rms)-0.9999995e9stat.fit.chi2;em.IR.J
jndof link to glossarysmallint2 Number of degrees of freedom for chisquare-9999stat.fit.dof;em.IR.J
jprobVar link to glossaryreal4 Probability of variable from chi-square (and other data)-0.9999995e9stat.probability;em.IR.J
jVarClass link to glossarysmallint2 Classification of variability in this band-9999meta.code.class;src.var;em.IR.J
variableClass link to glossaryint4 Classification of objects across all bands.-99999999meta.code.class
Total length178