| 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:
|
| Name | Type | Length | Unit | Description | Default Value | Unified Content Descriptor |
|---|---|---|---|---|---|---|
| sourceID | bigint | 8 | UID (unique over entire VSA via programme ID prefix) of this merged detection as assigned by merge algorithm | meta.id;meta.main | ||
| cuEventID | int | 4 | UID of curation event giving rise to this record | meta.bib | ||
| frameSetID | bigint | 8 | frame set ID, unique over the whole VSA via programme ID prefix, assigned by merging procedure | meta.id;obs.field | ||
| ra | float | 8 | Degrees | Mean Right Ascension | pos.eq.ra;meta.main | |
| dec | float | 8 | Degrees | Mean Declination | pos.eq.dec;meta.main | |
| sigRa | real | 4 | Degrees | Uncertainty in mean RA | -0.9999995e9 | stat.error |
| sigDec | real | 4 | Degrees | Uncertainty in mean Dec | -0.9999995e9 | stat.error |
| expAstErr | real | 4 | arcsec | Rms calculated from polynomial fit to minimum astrometric RMS as a function of magnitude | -0.9999995e9 | stat.error |
| epoch | float | 8 | Years | Epoch of measurement | time.epoch | |
| muRa | real | 4 | mas/yr | Proper motion in RA | -0.9999995e9 | pos.eq.ra;pos.pm |
| muDec | real | 4 | mas/yr | Proper motion in Dec | -0.9999995e9 | pos.eq.dec;pos.pm |
| sigMuRa | real | 4 | mas/yr | Error on proper motion in RA | -0.9999995e9 | stat.error |
| sigMuDec | real | 4 | mas/yr | Error on proper motion in Dec | -0.9999995e9 | stat.error |
| parallax | real | 4 | mas | Parallax of star | -0.9999995e9 | pos.parallax |
| minPllx | real | 4 | mas | Lower limit of 90% confidence interval for parallax measurement | -0.9999995e9 | pos.parallax;stat.min |
| maxPllx | real | 4 | mas | Upper limit of 90% confidence interval for parallax measurement | -0.9999995e9 | pos.parallax;stat.max |
| chi2 | real | 4 | Chi-squared value of astrometric solution | -0.9999995e9 | stat.fit.chi2 | |
| nFrames | int | 4 | Number of frames with good detections used to calculate astrometric fits | 0 | meta.number | |
| jnGoodObs | int | 4 | Number of good detections in J band | 0 | meta.number;em.IR.J | |
| jnFlaggedObs | int | 4 | Number of detections in J band flagged as potentially spurious by vikingDetection.ppErrBits | 0 | meta.number;em.IR.J | |
| jnMissingObs | int | 4 | Number of J band frames that this object should have been detected on and was not | 0 | meta.number;em.IR.J | |
| jbestAper | int | 4 | Best aperture (1-6) for photometric statistics in the J band | -9999 | meta.code.class;em.IR.J | |
| jminCadence | real | 4 | days | minimum gap between observations | -0.9999995e9 | time.interval;obs;stat.min |
| jmedCadence | real | 4 | days | median gap between observations | -0.9999995e9 | time.interval;obs;stat.median |
| jmaxCadence | real | 4 | days | maximum gap between observations | -0.9999995e9 | time.interval;obs;stat.max |
| jtotalPeriod | real | 4 | days | total period of observations (last obs-first obs) | -0.9999995e9 | time.duration |
| jmeanMag | real | 4 | mag | Mean J magnitude | -0.9999995e9 | phot.mag;em.IR.J;stat.mean;em.IR.J |
| jmedianMag | real | 4 | mag | Median J magnitude | -0.9999995e9 | phot.mag;em.IR.J;stat.median;em.IR.J |
| jMagRms | real | 4 | mag | rms of J magnitude | -0.9999995e9 | stat.error;em.IR.J;phot.mag |
| jMagMAD | real | 4 | mag | Median Absolute Deviation of J magnitude | -0.9999995e9 | stat.err;em.IR.J;phot.mag |
| jskewness | real | 4 | mag | Skewness in J band (see Sesar et al. 2007) | -0.9999995e9 | stat.param;em.IR.J |
| jMinMag | real | 4 | mag | Minimum magnitude in J band, of good detections | -0.9999995e9 | phot.mag;em.IR.J;stat.min |
| jMaxMag | real | 4 | mag | Maximum magnitude in J band, of good detections | -0.9999995e9 | phot.mag;em.IR.J;stat.max |
| jNgt3sig | smallint | 2 | Number of good detections in J-band that are more than 3 sigma deviations | -9999 | meta.number;em.IR.J | |
| jExpRms | real | 4 | mag | Rms calculated from polynomial fit to modal RMS as a function of magnitude in J band | -0.9999995e9 | stat.error;em.IR.J |
| jIntRms | real | 4 | mag | Intrinsic rms in J-band | -0.9999995e9 | stat.error;em.IR.J |
| jchiSqpd | real | 4 | Chi square (per degree of freedom) fit to data (mean and expected rms) | -0.9999995e9 | stat.fit.chi2;em.IR.J | |
| jndof | smallint | 2 | Number of degrees of freedom for chisquare | -9999 | stat.fit.dof;em.IR.J | |
| jprobVar | real | 4 | Probability of variable from chi-square (and other data) | -0.9999995e9 | stat.probability;em.IR.J | |
| jVarClass | smallint | 2 | Classification of variability in this band | -9999 | meta.code.class;src.var;em.IR.J | |
| variableClass | int | 4 | Classification of objects across all bands. | -99999999 | meta.code.class | |
| Total length | 178 |