Prompt Products Database

DiaForcedSource

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

Column Name Data Type Unit Description UCD Order 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
timeProcessedMjdTai double Time when this record was generated, expressed as Modified Julian Date, International Atomic Time.
timeWithdrawnMjdTai double Time when this record was marked invalid, expressed as Modified Julian Date, International Atomic Time.

DiaObject

Astronomical objects detected on one or more difference images

Column Name Data Type Unit Description UCD Order Principal
diaObjectId long Unique identifier of this DiaObject. meta.id;src
validityStartMjdTai double Processing time when validity of this diaObject starts, expressed as Modified Julian Date, International Atomic Time. time.epoch
validityEndMjdTai double Processing time when validity of this diaObject ends, 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.
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.

DiaSource

Difference image sources detected on difference images

Column Name Data Type Unit Description UCD Order 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
ssObjectReassocTimeMjdTai double Time when this diaSource was reassociated from diaObject to ssObject, expressed as Modified Julian Date, International Atomic Time (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 arcsec 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 deg 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 arcsec**2 Adaptive second moment of the source intensity.
iyy float arcsec**2 Adaptive second moment of the source intensity.
ixy float arcsec**2 Adaptive second moment of the source intensity.
ixxPSF float arcsec**2 Adaptive second moment for the PSF.
iyyPSF float arcsec**2 Adaptive second moment for the PSF.
ixyPSF float 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.
timeProcessedMjdTai double Time when the image was processed and this DiaSource record was generated, expressed as Modified Julian Date, International Atomic Time. time.epoch
timeWithdrawnMjdTai double Time when this record was marked invalid, expressed as Modified Julian Date, International Atomic Time. time.epoch
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.

SDM Schemas is maintained by Rubin Observatory.