Alert Production Database

The Alert Production Database (APDB) contains the catalogs resulting from image differencing during nightly Prompt Processing as well as the results of daily Solar System Processing.


metadata

Table containing various metadata key:value pairs for APDB.

Column Name Data Type Unit Description UCD Index Principal
name text Name or key for a metadata item.
value text Content of the metadata item in string representation.

DiaObject

The DiaObject table contains descriptions of the astronomical objects detected on one or more difference images.

Column Name Data Type Unit Description UCD Index Principal
diaObjectId long Unique identifier of this DiaObject. meta.id;src
validityStart timestamp Processing time when validity of this diaObject starts.
validityEnd timestamp Processing time when validity of this diaObject ends.
ra double deg Right ascension coordinate of the position of the object at time radecMjdTai. pos.eq.ra
raErr float deg Uncertainty of ra. stat.error;pos.eq.ra
dec double deg Declination coordinate of the position of the object at time radecMjdTai. pos.eq.dec
decErr float deg Uncertainty of dec. stat.error;pos.eq.dec
ra_dec_Cov float deg**2 Covariance between ra and dec.
radecMjdTai double Time at which the object was at a position ra/dec, expressed as Modified Julian Date, International Atomic Time. time.epoch
pmRa float mas/yr Proper motion in right ascension. pos.pm
pmRaErr float mas/yr Uncertainty of pmRa. stat.error;pos.pm
pmDec float mas/yr Proper motion of declination. pos.pm
pmDecErr float mas/yr Uncertainty of pmDec. stat.error;pos.pm
parallax float mas Parallax. pos.parallax
parallaxErr float mas Uncertainty of parallax. stat.error;pos.parallax
pmRa_pmDec_Cov float mas**2/yr**2 Covariance of pmRa and pmDec. stat.covariance;pos.eq
pmRa_parallax_Cov float mas**2/yr Covariance of pmRa and parallax. stat.covariance
pmDec_parallax_Cov float mas**2/yr Covariance of pmDec and parallax. stat.covariance
pmParallaxLnL float Natural log of the likelihood of the linear proper motion parallax fit. stat.likelihood
pmParallaxChi2 float Chi^2 static of the model fit. stat.fit.chi2
pmParallaxNdata int The number of data points used to fit the model.
u_psfFluxMean float nJy Weighted mean point-source model magnitude for u filter. phot.count
u_psfFluxMeanErr float nJy Standard error of u_psfFluxMean. stat.error
u_psfFluxSigma float nJy Standard deviation of the distribution of u_psfFlux. stat.stdev
u_psfFluxChi2 float Chi^2 statistic for the scatter of u_psfFlux around u_psfFluxMean. stat.fit.chi2
u_psfFluxNdata int The number of data points used to compute u_psfFluxChi2.
u_fpFluxMean float nJy Weighted mean forced photometry flux for u filter. phot.count
u_fpFluxMeanErr float nJy Standard error of u_fpFluxMean. stat.error
u_fpFluxSigma float nJy Standard deviation of the distribution of u_fpFlux. stat.stdev
g_psfFluxMean float nJy Weighted mean point-source model magnitude for g filter. phot.count
g_psfFluxMeanErr float nJy Standard error of g_psfFluxMean. stat.error
g_psfFluxSigma float nJy Standard deviation of the distribution of g_psfFlux. stat.stdev
g_psfFluxChi2 float Chi^2 statistic for the scatter of g_psfFlux around g_psfFluxMean. stat.fit.chi2
g_psfFluxNdata int The number of data points used to compute g_psfFluxChi2.
g_fpFluxMean float nJy Weighted mean forced photometry flux for g filter. phot.count
g_fpFluxMeanErr float nJy Standard error of g_fpFluxMean. stat.error
g_fpFluxSigma float nJy Standard deviation of the distribution of g_fpFlux. stat.stdev
r_psfFluxMean float nJy Weighted mean point-source model magnitude for r filter. phot.count
r_psfFluxMeanErr float nJy Standard error of r_psfFluxMean. stat.error
r_psfFluxSigma float nJy Standard deviation of the distribution of r_psfFlux. stat.stdev
r_psfFluxChi2 float Chi^2 statistic for the scatter of r_psfFlux around r_psfFluxMean. stat.fit.chi2
r_psfFluxNdata int The number of data points used to compute r_psfFluxChi2.
r_fpFluxMean float nJy Weighted mean forced photometry flux for r filter. phot.count
r_fpFluxMeanErr float nJy Standard error of r_fpFluxMean. stat.error
r_fpFluxSigma float nJy Standard deviation of the distribution of r_fpFlux. stat.stdev
i_psfFluxMean float nJy Weighted mean point-source model magnitude for i filter. phot.count
i_psfFluxMeanErr float nJy Standard error of i_psfFluxMean. stat.error
i_psfFluxSigma float nJy Standard deviation of the distribution of i_psfFlux. stat.stdev
i_psfFluxChi2 float Chi^2 statistic for the scatter of i_psfFlux around i_psfFluxMean. stat.fit.chi2
i_psfFluxNdata int The number of data points used to compute i_psfFluxChi2.
i_fpFluxMean float nJy Weighted mean forced photometry flux for i filter. phot.count
i_fpFluxMeanErr float nJy Standard error of i_fpFluxMean. stat.error
i_fpFluxSigma float nJy Standard deviation of the distribution of i_fpFlux. stat.stdev
z_psfFluxMean float nJy Weighted mean point-source model magnitude for z filter. phot.count
z_psfFluxMeanErr float nJy Standard error of z_psfFluxMean. stat.error
z_psfFluxSigma float nJy Standard deviation of the distribution of z_psfFlux. stat.stdev
z_psfFluxChi2 float Chi^2 statistic for the scatter of z_psfFlux around z_psfFluxMean. stat.fit.chi2
z_psfFluxNdata int The number of data points used to compute z_psfFluxChi2.
z_fpFluxMean float nJy Weighted mean forced photometry flux for z filter. phot.count
z_fpFluxMeanErr float nJy Standard error of z_fpFluxMean. stat.error
z_fpFluxSigma float nJy Standard deviation of the distribution of z_fpFlux. stat.stdev
y_psfFluxMean float nJy Weighted mean point-source model magnitude for y filter. phot.count
y_psfFluxMeanErr float nJy Standard error of y_psfFluxMean. stat.error
y_psfFluxSigma float nJy Standard deviation of the distribution of y_psfFlux. stat.error
y_psfFluxChi2 float Chi^2 statistic for the scatter of y_psfFlux around y_psfFluxMean. stat.fit.chi2
y_psfFluxNdata int The number of data points used to compute y_psfFluxChi2.
y_fpFluxMean float nJy Weighted mean forced photometry flux for y filter. phot.count
y_fpFluxMeanErr float nJy Standard error of y_fpFluxMean. stat.error
y_fpFluxSigma float nJy Standard deviation of the distribution of y_fpFlux. stat.stdev
nearbyObj1 long Id of the closest nearby object. meta.id;src
nearbyObj1Dist float arcsec Distance to nearbyObj1.
nearbyObj1LnP float Natural log of the probability that the observed diaObject is the same as the nearbyObj1.
nearbyObj2 long Id of the second-closest nearby object. meta.id;src
nearbyObj2Dist float arcsec Distance to nearbyObj2.
nearbyObj2LnP float Natural log of the probability that the observed diaObject is the same as the nearbyObj2.
nearbyObj3 long Id of the third-closest nearby object. meta.id;src
nearbyObj3Dist float arcsec Distance to nearbyObj3.
nearbyObj3LnP float Natural log of the probability that the observed diaObject is the same as the nearbyObj3.
nearbyExtObj1 long Id of the closest extended DR Object by second moment-based separation. meta.id;src
nearbyExtObj1Sep float Second moment-based separation of nearbyExtObj1 (unitless).
nearbyExtObj2 long Id of the second closest extended DR Object by second moment-based separation. meta.id;src
nearbyExtObj2Sep float Second moment-based separation of nearbyExtObj2 (unitless).
nearbyExtObj3 long Id of the third closest extended DR Object by second moment-based separation. meta.id;src
nearbyExtObj3Sep float Second moment-based separation of nearbyExtObj3 (unitless).
nearbyLowzGal string External catalog name of the nearest low-z potential host.
nearbyLowzGalSep float arcsec Separation distance of nearbyLowzGal.
u_scienceFluxMean float nJy Weighted mean forced photometry flux for u filter. phot.count
u_scienceFluxMeanErr float nJy Standard error of u_scienceFluxMean. stat.error
u_scienceFluxSigma float nJy Standard deviation of the distribution of u_scienceFlux. stat.stdev
g_scienceFluxMean float nJy Weighted mean forced photometry flux for g filter. phot.count
g_scienceFluxMeanErr float nJy Standard error of g_scienceFluxMean. stat.error
g_scienceFluxSigma float nJy Standard deviation of the distribution of g_scienceFlux. stat.stdev
r_scienceFluxMean float nJy Weighted mean forced photometry flux for r filter. phot.count
r_scienceFluxMeanErr float nJy Standard error of r_scienceFluxMean. stat.error
r_scienceFluxSigma float nJy Standard deviation of the distribution of r_scienceFlux. stat.stdev
i_scienceFluxMean float nJy Weighted mean forced photometry flux for i filter. phot.count
i_scienceFluxMeanErr float nJy Standard error of i_scienceFluxMean. stat.error
i_scienceFluxSigma float nJy Standard deviation of the distribution of i_scienceFlux. stat.stdev
z_scienceFluxMean float nJy Weighted mean forced photometry flux for z filter. phot.count
z_scienceFluxMeanErr float nJy Standard error of z_scienceFluxMean. stat.error
z_scienceFluxSigma float nJy Standard deviation of the distribution of z_scienceFlux. stat.stdev
y_scienceFluxMean float nJy Weighted mean forced photometry flux for y filter. phot.count
y_scienceFluxMeanErr float nJy Standard error of y_scienceFluxMean. stat.error
y_scienceFluxSigma float nJy Standard deviation of the distribution of y_scienceFlux. stat.stdev
u_psfFluxMAD float nJy Median absolute deviation u band fluxes.
u_psfFluxSkew float Skewness of the u band fluxes.
u_psfFluxPercentile05 float nJy Value at the 5% percentile of the u band fluxes.
u_psfFluxPercentile25 float nJy Value at the 25% percentile of the u band fluxes.
u_psfFluxPercentile50 float nJy Value at the 50% percentile (median) of the u band fluxes.
u_psfFluxPercentile75 float nJy Value at the 75% percentile of the u band fluxes.
u_psfFluxPercentile95 float nJy Value at the 95% percentile of the u band fluxes.
u_psfFluxMin float nJy Minimum observed u band fluxes.
u_psfFluxMax float nJy Maximum observed u band fluxes.
u_psfFluxStetsonJ float StetsonJ statistic for the u band fluxes.
u_psfFluxLinearSlope float nJy/d Linear best fit slope of the u band fluxes.
u_psfFluxLinearIntercept float Linear best fit Intercept of the u band fluxes.
u_psfFluxMaxSlope float nJy/d Maximum slope between u band flux obsevations max(delta_flux/delta_time).
u_psfFluxErrMean float nJy Mean of the u band flux errors.
g_psfFluxMAD float nJy Median absolute deviation g band fluxes.
g_psfFluxSkew float Skewness of the g band fluxes.
g_psfFluxPercentile05 float nJy Value at the 5% percentile of the g band fluxes.
g_psfFluxPercentile25 float nJy Value at the 25% percentile of the g band fluxes.
g_psfFluxPercentile50 float nJy Value at the 50% percentile (median) of the g band fluxes.
g_psfFluxPercentile75 float nJy Value at the 75% percentile of the g band fluxes.
g_psfFluxPercentile95 float nJy Value at the 95% percentile of the g band fluxes.
g_psfFluxMin float nJy Minimum observed g band fluxes.
g_psfFluxMax float nJy Maximum observed g band fluxes.
g_psfFluxStetsonJ float StetsonJ statistic for the g band fluxes.
g_psfFluxLinearSlope float nJy/d Linear best fit slope of the g band fluxes.
g_psfFluxLinearIntercept float nJy Linear best fit Intercept of the g band fluxes.
g_psfFluxMaxSlope float nJy/d Maximum slope between g band flux obsevations max(delta_flux/delta_time).
g_psfFluxErrMean float nJy Mean of the g band flux errors.
r_psfFluxMAD float nJy Median absolute deviation r band fluxes.
r_psfFluxSkew float Skewness of the r band fluxes.
r_psfFluxPercentile05 float nJy Value at the 5% percentile of the r band fluxes.
r_psfFluxPercentile25 float nJy Value at the 25% percentile of the r band fluxes.
r_psfFluxPercentile50 float nJy Value at the 50% percentile (median) of the r band fluxes.
r_psfFluxPercentile75 float nJy Value at the 75% percentile of the r band fluxes.
r_psfFluxPercentile95 float nJy Value at the 95% percentile of the r band fluxes.
r_psfFluxMin float nJy Minimum observed r band fluxes.
r_psfFluxMax float nJy Maximum observed r band fluxes.
r_psfFluxStetsonJ float StetsonJ statistic for the r band fluxes.
r_psfFluxLinearSlope float nJy/d Linear best fit slope of the r band fluxes.
r_psfFluxLinearIntercept float nJy Linear best fit Intercept of the r band fluxes.
r_psfFluxMaxSlope float nJy/d Maximum slope between r band flux obsevations max(delta_flux/delta_time).
r_psfFluxErrMean float nJy Mean of the r band flux errors.
i_psfFluxMAD float nJy Median absolute deviation i band fluxes.
i_psfFluxSkew float Skewness of the i band fluxes.
i_psfFluxPercentile05 float nJy Value at the 5% percentile of the i band fluxes.
i_psfFluxPercentile25 float nJy Value at the 25% percentile of the i band fluxes.
i_psfFluxPercentile50 float nJy Value at the 50% percentile (median) of the i band fluxes.
i_psfFluxPercentile75 float nJy Value at the 75% percentile of the i band fluxes.
i_psfFluxPercentile95 float nJy Value at the 95% percentile of the i band fluxes.
i_psfFluxMin float nJy Minimum observed i band fluxes.
i_psfFluxMax float nJy Maximum observed i band fluxes.
i_psfFluxStetsonJ float StetsonJ statistic for the i band fluxes.
i_psfFluxLinearSlope float nJy/d Linear best fit slope of the i band fluxes.
i_psfFluxLinearIntercept float nJy Linear best fit Intercept of the i band fluxes.
i_psfFluxMaxSlope float nJy/d Maximum slope between i band flux obsevations max(delta_flux/delta_time).
i_psfFluxErrMean float nJy Mean of the i band flux errors.
z_psfFluxMAD float nJy Median absolute deviation z band fluxes.
z_psfFluxSkew float Skewness of the z band fluxes.
z_psfFluxPercentile05 float nJy Value at the 5% percentile of the z band fluxes.
z_psfFluxPercentile25 float nJy Value at the 25% percentile of the z band fluxes.
z_psfFluxPercentile50 float nJy Value at the 50% percentile (median) of the z band fluxes.
z_psfFluxPercentile75 float nJy Value at the 75% percentile of the z band fluxes.
z_psfFluxPercentile95 float nJy Value at the 95% percentile of the z band fluxes.
z_psfFluxMin float nJy Minimum observed z band fluxes.
z_psfFluxMax float nJy Maximum observed z band fluxes.
z_psfFluxStetsonJ float StetsonJ statistic for the z band fluxes.
z_psfFluxLinearSlope float nJy/d Linear best fit slope of the z band fluxes.
z_psfFluxLinearIntercept float nJy Linear best fit Intercept of the z band fluxes.
z_psfFluxMaxSlope float nJy/d Maximum slope between z band flux obsevations max(delta_flux/delta_time).
z_psfFluxErrMean float nJy Mean of the z band flux errors.
y_psfFluxMAD float nJy Median absolute deviation y band fluxes.
y_psfFluxSkew float Skewness of the y band fluxes.
y_psfFluxPercentile05 float nJy Value at the 5% percentile of the y band fluxes.
y_psfFluxPercentile25 float nJy Value at the 25% percentile of the y band fluxes.
y_psfFluxPercentile50 float nJy Value at the 50% percentile (median) of the y band fluxes.
y_psfFluxPercentile75 float nJy Value at the 75% percentile of the y band fluxes.
y_psfFluxPercentile95 float nJy Value at the 95% percentile of the y band fluxes.
y_psfFluxMin float nJy Minimum observed y band fluxes.
y_psfFluxMax float nJy Maximum observed y band fluxes.
y_psfFluxStetsonJ float StetsonJ statistic for the y band fluxes.
y_psfFluxLinearSlope float nJy/d Linear best fit slope of the y band fluxes.
y_psfFluxLinearIntercept float nJy Linear best fit Intercept of the y band fluxes.
y_psfFluxMaxSlope float nJy/d Maximum slope between y band flux obsevations max(delta_flux/delta_time)
y_psfFluxErrMean float nJy Mean of the y band flux errors.
lastNonForcedSource timestamp Last time when non-forced DIASource was seen for this object.
nDiaSources int Total number of DiaSources associated with this DiaObject.

SSObject

LSST-computed per-object quantities. 1:1 relationship with MPCORB. Recomputed daily, upon MPCORB ingestion.

Column Name Data Type Unit Description UCD Index Principal
ssObjectId long Unique identifier. meta.id;src
discoverySubmissionDate double d The date the LSST first linked and submitted the discovery observations to the MPC. May be NULL if not an LSST discovery. The date format will follow general LSST conventions (MJD TAI, at the moment).
firstObservationDate double d The time of the first LSST observation of this object (could be precovered) as Modified Julian Date, International Atomic Time.
arc float d Arc of LSST observations.
numObs int Number of LSST observations of this object.
lcPeriodic binary Periodic light curve features computed on phase/distance-corrected magnitudes (H), 6x32 floats.
MOID float AU Minimum orbit intersection distance to Earth.
MOIDTrueAnomaly float deg True anomaly of the MOID point.
MOIDEclipticLongitude float deg Ecliptic longitude of the MOID point.
MOIDDeltaV float km/s DeltaV at the MOID point.
u_H float mag Best fit absolute magnitude (u band).
u_G12 float mag Best fit G12 slope parameter (u band).
u_HErr float mag Uncertainty of H (u band). stat.error
u_G12Err float mag Uncertainty of G12 (u band). stat.error
u_H_u_G12_Cov float mag**2 H-G12 covariance (u band). stat.covariance
u_Chi2 float Chi^2 statistic of the phase curve fit (u band). stat.fit.chi2
u_Ndata int The number of data points used to fit the phase curve (u band).
g_H float mag Best fit absolute magnitude (g band).
g_G12 float mag Best fit G12 slope parameter (g band).
g_HErr float mag Uncertainty of H (g band). stat.error
g_G12Err float mag Uncertainty of G12 (g band). stat.error
g_H_g_G12_Cov float mag**2 H-G12 covariance (g band). stat.covariance
g_Chi2 float Chi^2 statistic of the phase curve fit (g band). stat.fit.chi2
g_Ndata int The number of data points used to fit the phase curve (g band).
r_H float mag Best fit absolute magnitude (r band).
r_G12 float mag Best fit G12 slope parameter (r band).
r_HErr float mag Uncertainty of H (r band). stat.error
r_G12Err float mag Uncertainty of G12 (r band). stat.error
r_H_r_G12_Cov float mag**2 H-G12 covariance (r band). stat.covariance
r_Chi2 float Chi^2 statistic of the phase curve fit (r band). stat.fit.chi2
r_Ndata int The number of data points used to fit the phase curve (r band).
i_H float mag Best fit absolute magnitude (i band).
i_G12 float mag Best fit G12 slope parameter (i band).
i_HErr float mag Uncertainty of H (i band). stat.error
i_G12Err float mag Uncertainty of G12 (i band). stat.error
i_H_i_G12_Cov float mag**2 H-G12 covariance (i band). stat.covariance
i_Chi2 float Chi^2 statistic of the phase curve fit (i band). stat.fit.chi2
i_Ndata int The number of data points used to fit the phase curve (i band).
z_H float mag Best fit absolute magnitude (z band).
z_G12 float mag Best fit G12 slope parameter (z band).
z_HErr float mag Uncertainty of H (z band). stat.error
z_G12Err float mag Uncertainty of G12 (z band). stat.error
z_H_z_G12_Cov float mag**2 H-G12 covariance (z band). stat.covariance
z_Chi2 float Chi^2 statistic of the phase curve fit (z band). stat.fit.chi2
z_Ndata int The number of data points used to fit the phase curve (z band).
y_H float mag Best fit absolute magnitude (y band).
y_G12 float mag Best fit G12 slope parameter (y band).
y_HErr float mag Uncertainty of H (y band). stat.error
y_G12Err float mag Uncertainty of G12 (y band). stat.error
y_H_y_G12_Cov float mag**2 H-G12 covariance (y band). stat.covariance
y_Chi2 float Chi^2 statistic of the phase curve fit (y band). stat.fit.chi2
y_Ndata int The number of data points used to fit the phase curve (y band).
maxExtendedness float maximum `extendedness` value from the DIASource.
minExtendedness float minimum `extendedness` value from the DIASource.
medianExtendedness float median `extendedness` value from the DIASource.

DiaSource

Table to store 'difference image sources'; - sources detected at SNR >=5 on difference images.

Column Name Data Type Unit Description UCD Index Principal
diaSourceId long Unique identifier of this DiaSource. meta.id;obs.image
visit long Id of the visit where this diaSource was measured. meta.id;obs.image
detector short Id of the detector where this diaSource was measured. Datatype short instead of byte because of DB concerns about unsigned bytes. meta.id;obs.image
diaObjectId long Id of the diaObject this source was associated with, if any. If not, it is set to NULL (each diaSource will be associated with either a diaObject or ssObject). meta.id;src
ssObjectId long Id of the ssObject this source was associated with, if any. If not, it is set to NULL (each diaSource will be associated with either a diaObject or ssObject). meta.id;src
parentDiaSourceId long Id of the parent diaSource this diaSource has been deblended from, if any. meta.id;src
ssObjectReassocTime timestamp Time when this diaSource was reassociated from diaObject to ssObject (if such reassociation happens, otherwise NULL).
midpointMjdTai double d Effective mid-visit time for this diaSource, expressed as Modified Julian Date, International Atomic Time. time.epoch
ra double deg Right ascension coordinate of the center of this diaSource. pos.eq.ra
raErr float deg Uncertainty of ra. stat.error;pos.eq.ra
dec double deg Declination coordinate of the center of this diaSource. pos.eq.dec
decErr float deg Uncertainty of dec. stat.error;pos.eq.dec
ra_dec_Cov float deg**2 Covariance between ra and dec. stat.covariance
x float pixel x position computed by a centroiding algorithm. pos.cartesian.x
xErr float pixel Uncertainty of x. stat.error;pos.cartesian.x
y float pixel y position computed by a centroiding algorithm. pos.cartesian.y
yErr float pixel Uncertainty of y. stat.error;pos.cartesian.y
x_y_Cov float pixel**2 Covariance between x and y. stat.covariance
centroid_flag boolean General centroid algorithm failure flag; set if anything went wrong when fitting the centroid. Another centroid flag field should also be set to provide more information.
apFlux float nJy Flux in a 12 pixel radius aperture on the difference image. phot.count
apFluxErr float nJy Estimated uncertainty of apFlux. stat.error;phot.count
apFlux_flag boolean General aperture flux algorithm failure flag; set if anything went wrong when measuring aperture fluxes. Another apFlux flag field should also be set to provide more information.
apFlux_flag_apertureTruncated boolean Aperture did not fit within measurement image.
snr float The signal-to-noise ratio at which this source was detected in the difference image. stat.snr
psfFlux float nJy Flux for Point Source model. Note this actually measures the flux difference between the template and the visit image. phot.count
psfFluxErr float nJy Uncertainty of psfFlux.
psfRa double deg Right ascension coordinate of centroid for point source model. pos.eq.ra
psfRaErr float deg Uncertainty of psfRa. stat.error;pos.eq.ra
psfDec double deg Declination coordinate of centroid for point source model. pos.eq.dec
psfDecErr float deg Uncertainty of psfDec. stat.error;pos.eq.dec
psfFlux_psfRa_Cov float nJy.deg Covariance between psfFlux and psfRa. stat.covariance
psfFlux_psfDec_Cov float nJy.deg Covariance between psfFlux and psfDec. stat.covariance
psfRa_psfDec_Cov float deg**2 Covariance between psfRa and psfDec. stat.covariance
psfLnL float Natural log likelihood of the observed data given the point source model. stat.likelihood
psfChi2 float Chi^2 statistic of the point source model fit. stat.fit.chi2
psfNdata int The number of data points (pixels) used to fit the point source model.
psfFlux_flag boolean Failure to derive linear least-squares fit of psf model. Another psfFlux flag field should also be set to provide more information.
psfFlux_flag_edge boolean Object was too close to the edge of the image to use the full PSF model.
psfFlux_flag_noGoodPixels boolean Not enough non-rejected pixels in data to attempt the fit.
trailFlux float nJy Flux for a trailed source model. Note this actually measures the flux difference between the template and the visit image.
trailFluxErr float nJy Uncertainty of trailFlux.
trailRa double deg Right ascension coordinate of centroid for trailed source model. pos.eq.ra
trailRaErr float deg Uncertainty of trailRa. stat.error;pos.eq.ra
trailDec double deg Declination coordinate of centroid for trailed source model. pos.eq.dec
trailDecErr float deg Uncertainty of trailDec. stat.error;pos.eq.dec
trailLength float arcsec Maximum likelihood fit of trail length.
trailLengthErr float nJy Uncertainty of trailLength.
trailAngle float deg Maximum likelihood fit of the angle between the meridian through the centroid and the trail direction (bearing).
trailAngleErr float nJy Uncertainty of trailAngle.
trailFlux_trailRa_Cov float Covariance of trailFlux and trailRa. stat.covariance
trailFlux_trailDec_Cov float Covariance of trailFlux and trailDec. stat.covariance
trailFlux_trailLength_Cov float Covariance of trailFlux and trailLength stat.covariance
trailFlux_trailAngle_Cov float Covariance of trailFlux and trailAngle stat.covariance
trailRa_trailDec_Cov float Covariance of trailRa and trailDec. stat.covariance
trailRa_trailLength_Cov float Covariance of trailRa and trailLength. stat.covariance
trailRa_trailAngle_Cov float Covariance of trailRa and trailAngle. stat.covariance
trailDec_trailLength_Cov float Covariance of trailDec and trailLength. stat.covariance
trailDec_trailAngle_Cov float Covariance of trailDec and trailAngle. stat.covariance
trailLength_trailAngle_Cov float Covariance of trailLength and trailAngle stat.covariance
trailLnL float Natural log likelihood of the observed data given the trailed source model. stat.likelihood
trailChi2 float Chi^2 statistic of the trailed source model fit. stat.fit.chi2
trailNdata int The number of data points (pixels) used to fit the trailed source model.
trail_flag_edge boolean This flag is set if a trailed source extends onto or past edge pixels.
dipoleMeanFlux float nJy Maximum likelihood value for the mean absolute flux of the two lobes for a dipole model.
dipoleMeanFluxErr float nJy Uncertainty of dipoleMeanFlux. stat.error
dipoleFluxDiff float nJy Maximum likelihood value for the difference of absolute fluxes of the two lobes for a dipole model.
dipoleFluxDiffErr float nJy Uncertainty of dipoleFluxDiff. stat.error
dipoleRa double deg Right ascension coordinate of centroid for dipole model. pos.eq.ra
dipoleRaErr float deg Uncertainty of dipoleRa. stat.error;pos.eq.ra
dipoleDec double deg Declination coordinate of centroid for dipole model. pos.eq.dec
dipoleDecErr float deg Uncertainty of dipoleDec. stat.error;pos.eq.dec
dipoleLength float arcsec Maximum likelihood value for the lobe separation in dipole model. pos.angDistance
dipoleLengthErr float arcsec Uncertainty of dipoleLength. stat.error;pos.angDistance
dipoleAngle float deg Maximum likelihood fit of the angle between the meridian through the centroid and the dipole direction (bearing, from negative to positive lobe). pos.posAng
dipoleAngleErr float deg Uncertainty of dipoleAngle. stat.error;pos.posAng
dipoleMeanFlux_dipoleFluxDiff_Cov float Covariance of dipoleMeanFlux and dipoleFluxDiff. stat.covariance
dipoleMeanFlux_dipoleRa_Cov float Covariance of dipoleMeanFlux and dipoleRa. stat.covariance
dipoleMeanFlux_dipoleDec_Cov float Covariance of dipoleMeanFlux and dipoleDec. stat.covariance
dipoleMeanFlux_dipoleLength_Cov float Covariance of dipoleMeanFlux and dipoleLength. stat.covariance
dipoleMeanFlux_dipoleAngle_Cov float Covariance of dipoleMeanFlux and dipoleAngle. stat.covariance
dipoleFluxDiff_dipoleRa_Cov float Covariance of dipoleFluxDiff and dipoleRa. stat.covariance
dipoleFluxDiff_dipoleDec_Cov float Covariance of dipoleFluxDiff and dipoleDec. stat.covariance
dipoleFluxDiff_dipoleLength_Cov float Covariance of dipoleFluxDiff and dipoleLength. stat.covariance
dipoleFluxDiff_dipoleAngle_Cov float Covariance of dipoleFluxDiff and dipoleAngle. stat.covariance
dipoleRa_dipoleDec_Cov float Covariance of dipoleRa and dipoleDec. stat.covariance
dipoleRa_dipoleLength_Cov float Covariance of dipoleRa and dipoleLength. stat.covariance
dipoleRa_dipoleAngle_Cov float Covariance of dipoleRa and dipoleAngle. stat.covariance
dipoleDec_dipoleLength_Cov float Covariance of dipoleDec and dipoleLength. stat.covariance
dipoleDec_dipoleAngle_Cov float Covariance of dipoleDec and dipoleAngle. stat.covariance
dipoleLength_dipoleAngle_Cov float Covariance of dipoleLength and dipoleAngle. stat.covariance
dipoleLnL float Natural log likelihood of the observed data given the dipole source model. stat.likelihood
dipoleChi2 float Chi^2 statistic of the model fit. stat.fit.chi2
dipoleNdata int The number of data points (pixels) used to fit the model.
scienceFlux float nJy Forced photometry flux for a point source model measured on the visit image centered at DiaSource position. phot.count
scienceFluxErr float nJy Estimated uncertainty of scienceFlux. stat.error;phot.count
forced_PsfFlux_flag boolean Forced PSF photometry on science image failed. Another forced_PsfFlux flag field should also be set to provide more information.
forced_PsfFlux_flag_edge boolean Forced PSF flux on science image was too close to the edge of the image to use the full PSF model.
forced_PsfFlux_flag_noGoodPixels boolean Forced PSF flux not enough non-rejected pixels in data to attempt the fit.
snapDiffFlux float nJy Calibrated flux for Point Source model centered on radec but measured on the difference of snaps comprising this visit.
snapDiffFluxErr float nJy Estimated uncertainty of snapDiffFlux. stat.error;phot.count
fpBkgd float nJy/arcsec**2 Estimated sky background at the position (centroid) of the object.
fpBkgdErr float nJy/arcsec**2 Estimated uncertainty of fpBkgd.
ixx float nJy.arcsec**2 Adaptive second moment of the source intensity.
ixxErr float nJy.arcsec**2 Uncertainty of ixx. stat.error
iyy float nJy.arcsec**2 Adaptive second moment of the source intensity.
iyyErr float nJy.arcsec**2 Uncertainty of iyy. stat.error
ixy float nJy.arcsec**2 Adaptive second moment of the source intensity.
ixyErr float nJy.arcsec**2 Uncertainty of ixy. stat.error
ixx_iyy_Cov float nJy**2.arcsec**4 Covariance of ixx and iyy.
ixx_ixy_Cov float nJy**2.arcsec**4 Covariance of ixx and ixy.
iyy_ixy_Cov float nJy**2.arcsec**4 Covariance of iyy and ixy.
ixxPSF float nJy.arcsec**2 Adaptive second moment for the PSF.
iyyPSF float nJy.arcsec**2 Adaptive second moment for the PSF.
ixyPSF float nJy.arcsec**2 Adaptive second moment for the PSF.
shape_flag boolean General source shape algorithm failure flag; set if anything went wrong when measuring the shape. Another shape flag field should also be set to provide more information.
shape_flag_no_pixels boolean No pixels to measure shape.
shape_flag_not_contained boolean Center not contained in footprint bounding box.
shape_flag_parent_source boolean This source is a parent source; we should only be measuring on deblended children in difference imaging.
extendedness float A measure of extendedness, computed by comparing an object's moment-based traced radius to the PSF moments. extendedness = 1 implies a high degree of confidence that the source is extended. extendedness = 0 implies a high degree of confidence that the source is point-like.
reliability float A measure of reliability, computed using information from the source and image characterization, as well as the information on the Telescope and Camera system (e.g., ghost maps, defect maps, etc.).
band char Filter band this source was observed with.
isDipole boolean Source well fit by a dipole.
dipoleFitAttempted boolean Attempted to fit a dipole model to this source.
time_processed timestamp Time when the image was processed and this DiaSource record was generated.
time_withdrawn timestamp Time when this record was marked invalid.
bboxSize long
pixelFlags boolean General pixel flags failure; set if anything went wrong when setting pixels flags from this footprint's mask. This implies that some pixelFlags for this source may be incorrectly set to False.
pixelFlags_bad boolean Bad pixel in the DiaSource footprint.
pixelFlags_cr boolean Cosmic ray in the DiaSource footprint.
pixelFlags_crCenter boolean Cosmic ray in the 3x3 region around the centroid.
pixelFlags_edge boolean Some of the source footprint is outside usable exposure region (masked EDGE or NO_DATA, or centroid off image).
pixelFlags_interpolated boolean Interpolated pixel in the DiaSource footprint.
pixelFlags_interpolatedCenter boolean Interpolated pixel in the 3x3 region around the centroid.
pixelFlags_offimage boolean DiaSource center is off image.
pixelFlags_saturated boolean Saturated pixel in the DiaSource footprint.
pixelFlags_saturatedCenter boolean Saturated pixel in the 3x3 region around the centroid.
pixelFlags_suspect boolean DiaSource's footprint includes suspect pixels.
pixelFlags_suspectCenter boolean Suspect pixel in the 3x3 region around the centroid.
pixelFlags_streak boolean Streak in the DiaSource footprint.
pixelFlags_streakCenter boolean Streak in the 3x3 region around the centroid.
pixelFlags_injected boolean Injection in the DiaSource footprint.
pixelFlags_injectedCenter boolean Injection in the 3x3 region around the centroid.
pixelFlags_injected_template boolean Template injection in the DiaSource footprint.
pixelFlags_injected_templateCenter boolean Template injection in the 3x3 region around the centroid.

DiaForcedSource

Forced-photometry source measurement on an individual difference Exposure for all objects in the DiaObject table.

Column Name Data Type Unit Description UCD Index Principal
diaForcedSourceId long Unique id.
diaObjectId long Id of the DiaObject that this DiaForcedSource was associated with. meta.id;src
ra double deg Right ascension coordinate of the position of the DiaObject at time radecMjdTai. pos.eq.ra
dec double deg Declination coordinate of the position of the DiaObject at time radecMjdTai. pos.eq.dec
visit long Id of the visit where this forcedSource was measured. meta.id;obs.image
detector short Id of the detector where this forcedSource was measured. Datatype short instead of byte because of DB concerns about unsigned bytes. meta.id;obs.image
psfFlux float nJy Point Source model flux. phot.count
psfFluxErr float nJy Uncertainty of psfFlux. stat.error;phot.count
midpointMjdTai double d Effective mid-visit time for this diaForcedSource, expressed as Modified Julian Date, International Atomic Time. time.epoch
scienceFlux float nJy Forced photometry flux for a point source model measured on the visit image centered at the DiaObject position. phot.count
scienceFluxErr float nJy Uncertainty of scienceFlux. stat.error;phot.count
band char Filter band this source was observed with. meta.id;instr.filter
time_processed timestamp Time when this record was generated.
time_withdrawn timestamp Time when this record was marked invalid.

DiaObject_To_Object_Match

The table stores mapping of diaObjects to the nearby objects.

Column Name Data Type Unit Description UCD Index Principal
diaObjectId long Id of diaObject. meta.id;src
objectId long Id of a nearby object. meta.id;src
dist float arcsec The distance between the diaObject and the object.
lnP float Natural log of the probability that the observed diaObject is the same as the nearby object.

DiaObjectLast

Table with a subset of DiaObject columns used to store only the latest version of each object.

Column Name Data Type Unit Description UCD Index Principal
diaObjectId long Unique id. meta.id;src
lastNonForcedSource timestamp Last time when non-forced DIASource was seen for this object.
ra double deg Right ascension coordinate of the position of the object at time radecMjdTai. pos.eq.ra
raErr float deg Uncertainty of ra. stat.error;pos.eq.ra
dec double deg Declination coordinate of the position of the object at time radecMjdTai. pos.eq.dec
decErr float deg Uncertainty of dec. stat.error;pos.eq.dec
ra_dec_Cov float deg**2 Covariance between ra and dec.
radecMjdTai double Time at which the object was at a position ra/dec, expressed as Modified Julian Date, International Atomic Time. time.epoch
pmRa float mas/yr Proper motion (RA). pos.pm
pmRaErr float mas/yr Uncertainty of pmRa. stat.error;pos.pm
pmDec float mas/yr Proper motion (Dec). pos.pm
pmDecErr float mas/yr Uncertainty of pmDec. stat.error;pos.pm
parallax float mas Parallax. pos.parallax
parallaxErr float mas Uncertainty of parallax. stat.error;pos.parallax
pmRa_pmDec_Cov float mas**2/yr**2 Covariance of pmRa and pmDec. stat.covariance;pos.eq
pmRa_parallax_Cov float mas**2/yr Covariance of pmRa and parallax. stat.covariance
pmDec_parallax_Cov float mas**2/yr Covariance of pmDec and parallax. stat.covariance

MPCORB

The orbit catalog produced by the Minor Planet Center. Ingested daily. O(10M) rows by survey end. The columns are described at https://minorplanetcenter.net//iau/info/MPOrbitFormat.html

Column Name Data Type Unit Description UCD Index Principal
mpcDesignation char Number or provisional designation (in packed form). meta.id;src
mpcNumber int MPC number (if the asteroid has been numbered; NULL otherwise). Provided for convenience.
ssObjectId long LSST unique identifier (if observed by LSST). meta.id;src
mpcH float mag Absolute magnitude, H.
mpcG float Slope parameter, G.
epoch double d Epoch (in MJD, .0 TT).
M double deg Mean anomaly at the epoch, in degrees.
peri double deg Argument of perihelion, J2000.0 (degrees).
node double deg Longitude of the ascending node, J2000.0 (degrees).
incl double deg Inclination to the ecliptic, J2000.0 (degrees).
e double Orbital eccentricity.
n double deg/d Mean daily motion (degrees per day).
a double AU Semimajor axis (AU).
uncertaintyParameter char Uncertainty parameter, U.
reference char Reference.
nobs int Number of observations.
nopp int Number of oppositions.
arc float d Arc (days), for single-opposition objects.
arcStart timestamp Year of first observation (for multi-opposition objects).
arcEnd timestamp Year of last observation (for multi-opposition objects).
rms float arcsec r.m.s residual (arcsec).
pertsShort char Coarse indicator of perturbers (blank if unperturbed one-opposition. object)'
pertsLong char Precise indicator of perturbers (blank if unperturbed one-opposition. object)'
computer char Computer name.
flags int 4-hexdigit flags. See https://minorplanetcenter.net//iau/info/MPOrbitFormat.html. for details'
fullDesignation char Readable designation.
lastIncludedObservation float d Date of last observation included in orbit solution.

MPCORBDESIGMAP

The mapping between old and new provisional MPC designation, produced by the Minor Planet Center. Ingested daily. O(few x 10M) rows by survey end.

Column Name Data Type Unit Description UCD Index Principal
mpcDesignation char Either the MPC provisional or permanent designation. meta.id;src
mpcNumber int MPC number (if the asteroid has been numbered).
otherDesignation char Other designation by which this object is known.
ssObjectId long LSST unique identifier (if observed by LSST). meta.id;src

SSSource

LSST-computed per-source quantities. 1:1 relationship with DIASource. Recomputed daily, upon MPCORB ingestion.

Column Name Data Type Unit Description UCD Index Principal
ssObjectId long Unique identifier of the object. meta.id;src
diaSourceId long Unique identifier of the observation. meta.id;src
mpcUniqueId long MPC unique identifier of the observation.
nearbyObj1 long Closest Objects (3 stars and 3 galaxies) in Level 2 database.
nearbyObj2 long Closest Objects (3 stars and 3 galaxies) in Level 2 database.
nearbyObj3 long Closest Objects (3 stars and 3 galaxies) in Level 2 database.
nearbyObj4 long Closest Objects (3 stars and 3 galaxies) in Level 2 database.
nearbyObj5 long Closest Objects (3 stars and 3 galaxies) in Level 2 database.
nearbyObj6 long Closest Objects (3 stars and 3 galaxies) in Level 2 database.
nearbyObjDist1 float Distances to nearbyObj.
nearbyObjDist2 float Distances to nearbyObj.
nearbyObjDist3 float Distances to nearbyObj.
nearbyObjDist4 float Distances to nearbyObj.
nearbyObjDist5 float Distances to nearbyObj.
nearbyObjDist6 float Distances to nearbyObj.
nearbyObjLnP1 float Natural log of the probability that the observed DIAObject is the same as the nearby Object.
nearbyObjLnP2 float Natural log of the probability that the observed DIAObject is the same as the nearby Object.
nearbyObjLnP3 float Natural log of the probability that the observed DIAObject is the same as the nearby Object.
nearbyObjLnP4 float Natural log of the probability that the observed DIAObject is the same as the nearby Object.
nearbyObjLnP5 float Natural log of the probability that the observed DIAObject is the same as the nearby Object.
nearbyObjLnP6 float Natural log of the probability that the observed DIAObject is the same as the nearby Object.
eclipticLambda double deg Ecliptic longitude.
eclipticBeta double deg Ecliptic latitude.
galacticL double deg Galactic longitude.
galacticB double deg Galactic latitute.
phaseAngle float deg Phase angle.
heliocentricDist float AU Heliocentric distance.
topocentricDist float AU Topocentric distace.
predictedMagnitude float mag Predicted magnitude.
predictedMagnitudeSigma float mag Prediction uncertainty (1-sigma).
residualRa double deg Residual R.A. vs. ephemeris.
residualDec double deg Residual Dec vs. ephemeris.
predictedRaSigma float deg Predicted R.A. uncertainty.
predictedDecSigma float deg Predicted Dec uncertainty.
predictedRaDecCov float deg**2 Predicted R.A./Dec covariance.
heliocentricX float AU Cartesian heliocentric X coordinate (at the emit time).
heliocentricY float AU Cartesian heliocentric Y coordinate (at the emit time).
heliocentricZ float AU Cartesian heliocentric Z coordinate (at the emit time).
heliocentricVX float AU Cartesian heliocentric X velocity (at the emit time).
heliocentricVY float AU Cartesian heliocentric Y velocity (at the emit time).
heliocentricVZ float AU Cartesian heliocentric Z velocity (at the emit time).
topocentricX float AU Cartesian topocentric X coordinate (at the emit time).
topocentricY float AU Cartesian topocentric Y coordinate (at the emit time).
topocentricZ float AU Cartesian topocentric Z coordinate (at the emit time).
topocentricVX float AU Cartesian topocentric X velocity (at the emit time).
topocentricVY float AU Cartesian topocentric Y velocity (at the emit time).
topocentricVZ float AU Cartesian topocentric Z velocity (at the emit time).

DetectorVisitProcessingSummary

Properties of an image from one processing of a single detector in a visit.

Column Name Data Type Unit Description UCD Index Principal
visit long Id of the visit this visit was a part of. meta.id;obs.image
detector short Id of the detector on the instrument that took this visit. Datatype short instead of byte because of DB concerns about unsigned bytes. meta.id;obs.image
ra double deg Right Ascension of detector center.
dec double deg Declination of detector center.
pixelScale float arcsec/pixel Measured detector pixel scale.
zeroPoint float mag Zero-point for the detector, estimated at detector center.
psfSigma float pixel PSF model second-moments determinant radius (center of detector).
skyBg float adu Average sky background.
skyNoise float adu RMS noise of the sky background.
seeing double arcsec Mean measured FWHM of the PSF.
xSize long pixel Number of columns in the image.
ySize long pixel Number of rows in the image.
llcra double deg RA of lower left corner.
llcdec double deg Declination of lower left corner.
ulcra double deg RA of upper left corner.
ulcdec double deg Declination of upper left corner.
urcra double deg RA of upper right corner.
urcdec double deg Declination of upper right corner.
lrcra double deg RA of lower right corner.
lrcdec double deg Declination of lower right corner.
astromOffsetMean double arcsec Mean offset of astrometric calibration matches (arcsec).
astromOffsetStd double arcsec Standard deviation of offsets of astrometric calibration matches (arcsec).
nPsfStar int Number of stars used for PSF model.
psfStarDeltaE1Median double Median E1 residual (starE1 - psfE1) for psf stars.
psfStarDeltaE2Median double Median E2 residual (starE2 - psfE2) for psf stars.
psfStarDeltaE1Scatter double Scatter (via MAD) of E1 residual (starE1 - psfE1) for psf stars.
psfStarDeltaE2Scatter double Scatter (via MAD) of E2 residual (starE2 - psfE2) for psf stars.
psfStarDeltaSizeMedian double pixel Median size residual (starSize - psfSize) for psf stars (pixel).
psfStarDeltaSizeScatter double pixel Scatter (via MAD) of size residual (starSize - psfSize) for stars (pixel).
psfStarScaledDeltaSizeScatter double Scatter (via MAD) of size residual scaled by median size squared.
psfTraceRadiusDelta double pixel Delta (max - min) of model psf trace radius values evaluated on a grid of unmasked pixels (pixel).
psfApFluxDelta double Delta (max - min) of model psf aperture flux (with aperture radius of max(2, 3*psfSigma)) values evaluated on a grid of unmasked pixels
psfApCorrSigmaScaledDelta double Delta (max - min) of psf flux aperture correction factors scaled (divided) by the psfSigma evaluated on a grid of unmasked pixels
maxDistToNearestPsf double pixel Maximum distance of an unmasked pixel to its nearest model psf star (pixel).

SDM Schemas is maintained by Rubin Observatory.