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.

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).

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. pos.eq.ra
dec double deg Declination coordinate of the position of the DiaObject. 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

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. 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. 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.
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_psfFluxNdata int The number of u-band data points.
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
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_psfFluxNdata int The number of g-band data points.
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
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_psfFluxNdata int The number of r-band data points.
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
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_psfFluxNdata int The number of i-band data points.
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
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_psfFluxNdata int The number of z-band data points.
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
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.stdev
y_psfFluxNdata int The number of y-band data points.
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
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
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
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
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
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
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
u_psfFluxMin float nJy Minimum observed u band fluxes.
u_psfFluxMax float nJy Maximum observed 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_psfFluxMin float nJy Minimum observed g band fluxes.
g_psfFluxMax float nJy Maximum observed 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_psfFluxMin float nJy Minimum observed r band fluxes.
r_psfFluxMax float nJy Maximum observed 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_psfFluxMin float nJy Minimum observed i band fluxes.
i_psfFluxMax float nJy Maximum observed 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_psfFluxMin float nJy Minimum observed z band fluxes.
z_psfFluxMax float nJy Maximum observed 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_psfFluxMin float nJy Minimum observed y band fluxes.
y_psfFluxMax float nJy Maximum observed 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.
firstDiaSourceMjdTai double Time of the first diaSource, expressed as Modified Julian Date, International Atomic Time. time.epoch
lastDiaSourceMjdTai double Time of the most recent non-forced DIASource for this object, expressed as Modified Julian Date, International Atomic Time. time.epoch
nDiaSources int Total number of DiaSources associated with this DiaObject.

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
lastDiaSourceMjdTai double Time of the most recent non-forced DIASource for this object, expressed as Modified Julian Date, International Atomic Time. time.epoch
ra double deg Right ascension coordinate of the position of the object. 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. 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.
firstDiaSourceMjdTai double Time of the first diaSource, expressed as Modified Julian Date, International Atomic Time. time.epoch
nDiaSources int Total number of DiaSources associated with this DiaObject.

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.

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
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.
isNegative boolean Source was detected as significantly negative.
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.
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.
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
dipoleLength float arcsec Maximum likelihood value for the lobe separation in dipole model. 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
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.
templateFlux float nJy Forced photometry flux for a point source model measured on the template image centered at the DiaObject position. phot.count
templateFluxErr float nJy Uncertainty of templateFlux. stat.error;phot.count
ixx float nJy.arcsec**2 Adaptive second moment of the source intensity.
iyy float nJy.arcsec**2 Adaptive second moment of the source intensity.
ixy float nJy.arcsec**2 Adaptive second moment of the source intensity.
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 Probability (0-1) that the diaSource is astrophysical, derived from a machine learning model.
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 int pixel Size of the square bounding box that fully contains the detection footprint.
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 centroid off image).
pixelFlags_nodata boolean NO_DATA pixel in the source footprint.
pixelFlags_nodataCenter boolean NO_DATA pixel in the 3x3 region around the centroid.
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.
glint_trail boolean This flag is set if the source is part of a glint trail.

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
ssObjectId long LSST unique identifier (if observed by LSST). meta.id;src
mpcH float mag Absolute magnitude, H.
epoch double d Epoch (in MJD, .0 TT).
M double deg Mean anomaly at the epoch.
peri double deg Argument of perihelion, J2000.0.
node double deg Longitude of the ascending node, J2000.0.
incl double deg Inclination to the ecliptic, J2000.0.
e double Orbital eccentricity.
a double AU Semimajor axis.
q double AU Perihelion distance.
t_p double d MJD of pericentric passage.

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

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.

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
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.
predictedVMagnitude float mag Predicted V-band magnitude.
residualRa double deg Residual R.A. vs. ephemeris.
residualDec double deg Residual Dec vs. ephemeris.
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/d Cartesian heliocentric X velocity (at the emit time).
heliocentricVY float AU/d Cartesian heliocentric Y velocity (at the emit time).
heliocentricVZ float AU/d 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/d Cartesian topocentric X velocity (at the emit time).
topocentricVY float AU/d Cartesian topocentric Y velocity (at the emit time).
topocentricVZ float AU/d Cartesian topocentric Z velocity (at the emit time).

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.

SDM Schemas is maintained by Rubin Observatory.