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Table: ls_dr10.tractor_s
(The bold columns are indexed columns)
Column NameDescriptionDatatype
allmask_gBitwise mask set if the central pixel from all images satisfy each condition in g as cataloged on the DR10 bitmasks page_smallint
allmask_iBitwise mask set if the central pixel from all images satisfy each condition in i as cataloged on the DR10 bitmasks page_smallint
allmask_rBitwise mask set if the central pixel from all images satisfy each condition in r as cataloged on the DR10 bitmasks page_smallint
allmask_zBitwise mask set if the central pixel from all images satisfy each condition in z as cataloged on the DR10 bitmasks page_smallint
anymask_gBitwise mask set if the central pixel from any image satisfies each condition in g as cataloged on the DR10 bitmasks page_smallint
anymask_iBitwise mask set if the central pixel from any image satisfies each condition in i as cataloged on the DR10 bitmasks page_smallint
anymask_rBitwise mask set if the central pixel from any image satisfies each condition in r as cataloged on the DR10 bitmasks page_smallint
anymask_zBitwise mask set if the central pixel from any image satisfies each condition in z as cataloged on the DR10 bitmasks page_smallint
blob_nea_gBlob-masked noise equivalent area_ in g.real
blob_nea_iBlob-masked noise equivalent area_ in i.real
blob_nea_rBlob-masked noise equivalent area_ in r.real
blob_nea_zBlob-masked noise equivalent area_ in z.real
brick_primaryTrue if the object is within the brick boundarysmallint
brickidBrick ID [1,662174]integer
bricknameName of brick, encoding the brick sky position, eg 1126p222 near RA=112.6, Dec=+22.2varchar
bxX position (0-indexed) of coordinates in the brick image stack (*i.e.* in the *e.g.* legacysurvey--image-g.fits.fz coadd file_)real
byY position (0-indexed) of coordinates in brick image stackreal
dchisq_1Difference in |chi|^2 between successively more-complex model fits: PSF, REX, DEV, EXP, SER. The difference is versus no source.real
dchisq_2Difference in |chi|^2 between successively more-complex model fits: PSF, REX, DEV, EXP, SER. The difference is versus no source.real
dchisq_3Difference in |chi|^2 between successively more-complex model fits: PSF, REX, DEV, EXP, SER. The difference is versus no source.real
dchisq_4Difference in |chi|^2 between successively more-complex model fits: PSF, REX, DEV, EXP, SER. The difference is versus no source.real
dchisq_5Difference in |chi|^2 between successively more-complex model fits: PSF, REX, DEV, EXP, SER. The difference is versus no source.real
decDeclination at equinox J2000double
dec_ivarInverse variance of DEC, excluding astrometric calibration errorsreal
dered_flux_gDereddened g band fluxreal
dered_flux_iDereddened i band fluxreal
dered_flux_rDereddened r band fluxreal
dered_flux_w1Dereddened w1 band fluxreal
dered_flux_w2Dereddened w2 band fluxreal
dered_flux_w3Dereddened w3 band fluxreal
dered_flux_w4Dereddened w4 band fluxreal
dered_flux_zDereddened z band fluxreal
dered_mag_gDereddened g-band magnitudereal
dered_mag_iDereddened i-band magnitudereal
dered_mag_rDereddened r-band magnitudereal
dered_mag_w1Dereddened w1-band magnitudereal
dered_mag_w2Dereddened w2-band magnitudereal
dered_mag_w3Dereddened w3-band magnitudereal
dered_mag_w4Dereddened w4-band magnitudereal
dered_mag_zDereddened z-band magnitudereal
ebvGalactic extinction E(B-V) reddening from SFD98_, used to compute the mw_transmission_ columnsreal
elatEcliptic Latitudedouble
elonEcliptic Longitudedouble
fiberflux_gPredicted g-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeingreal
fiberflux_iPredicted i-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeingreal
fiberflux_rPredicted r-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeingreal
fiberflux_zPredicted z-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeingreal
fibertotflux_gPredicted g-band flux within a fiber of diameter 1.5 arcsec from all sources at this location in 1 arcsec Gaussian seeingreal
fibertotflux_iPredicted i-band flux within a fiber of diameter 1.5 arcsec from all sources at this location in 1 arcsec Gaussian seeingreal
fibertotflux_rPredicted r-band flux within a fiber of diameter 1.5 arcsec from all sources at this location in 1 arcsec Gaussian seeingreal
fibertotflux_zPredicted z-band flux within a fiber of diameter 1.5 arcsec from all sources at this location in 1 arcsec Gaussian seeingreal
fitbitsBitwise mask detailing pecularities of how an object was fit, as cataloged on the DR10 bitmasks page_smallint
flux_gmodel flux in greal
flux_imodel flux in ireal
flux_ivar_gInverse variance of flux_greal
flux_ivar_iInverse variance of flux_ireal
flux_ivar_rInverse variance of flux_rreal
flux_ivar_w1Inverse variance of flux_w1 (AB system)real
flux_ivar_w2Inverse variance of flux_w2 (AB)real
flux_ivar_w3Inverse variance of flux_w3 (AB)real
flux_ivar_w4Inverse variance of flux_w4 (AB)real
flux_ivar_zInverse variance of flux_zreal
flux_rmodel flux in rreal
flux_w1WISE model flux in W1 (AB system)real
flux_w2WISE model flux in W2 (AB)real
flux_w3WISE model flux in W3 (AB)real
flux_w4WISE model flux in W4 (AB)real
flux_zmodel flux in zreal
fracflux_gProfile-weighted fraction of the flux from other sources divided by the total flux in g (typically [0,1])real
fracflux_iProfile-weighted fraction of the flux from other sources divided by the total flux in i (typically [0,1])real
fracflux_rProfile-weighted fraction of the flux from other sources divided by the total flux in r (typically [0,1])real
fracflux_w1Profile-weighted fraction of the flux from other sources divided by the total flux in W1 (typically [0,1])real
fracflux_w2Profile-weighted fraction of the flux from other sources divided by the total flux in W2 (typically [0,1])real
fracflux_w3Profile-weighted fraction of the flux from other sources divided by the total flux in W3 (typically [0,1])real
fracflux_w4Profile-weighted fraction of the flux from other sources divided by the total flux in W4 (typically [0,1])real
fracflux_zProfile-weighted fraction of the flux from other sources divided by the total flux in z (typically [0,1])real
fracin_gFraction of a source flux within the blob in g, near unity for real sourcesreal
fracin_iFraction of a source flux within the blob in i, near unity for real sourcesreal
fracin_rFraction of a source flux within the blob in r, near unity for real sourcesreal
fracin_zFraction of a source flux within the blob in z, near unity for real sourcesreal
fracmasked_gProfile-weighted fraction of pixels masked from all observations of this object in g, strictly between [0,1]real
fracmasked_iProfile-weighted fraction of pixels masked from all observations of this object in i, strictly between [0,1]real
fracmasked_rProfile-weighted fraction of pixels masked from all observations of this object in r, strictly between [0,1]real
fracmasked_zProfile-weighted fraction of pixels masked from all observations of this object in z, strictly between [0,1]real
g_rComputed (g-r) colorreal
gaia_a_g_valGaia EDR3_ line-of-sight extinction in the G bandreal
gaia_astrometric_excess_noiseGaia EDR3_ astrometric excess noisereal
gaia_astrometric_excess_noise_sigGaia EDR3_ astrometric excess noise uncertaintyreal
gaia_astrometric_n_good_obs_alGaia EDR3_ number of good astrometric observations along scan directionsmallint
gaia_astrometric_n_obs_alGaia EDR3_ number of astrometric observations along scan directionsmallint
gaia_astrometric_params_solvedWhich astrometric parameters were estimated for a Gaia EDR3_ sourcesmallint
gaia_astrometric_sigma5d_maxGaia EDR3_ longest semi-major axis of the 5-d error ellipsoidreal
gaia_astrometric_weight_alGaia EDR3_ astrometric weight along scan directionreal
gaia_duplicated_sourceGaia EDR3_ duplicated source flagsmallint
gaia_e_bp_min_rp_valGaia EDR3_ line-of-sight reddening E(BP-RP)real
gaia_phot_bp_mean_flux_over_errorGaia EDR3_ BP signal-to-noisereal
gaia_phot_bp_mean_magGaia EDR3_ BP magreal
gaia_phot_bp_n_obsGaia EDR3_ BP number of observationssmallint
gaia_phot_bp_rp_excess_factorGaia EDR3_ BP/RP excess factorreal
gaia_phot_g_mean_flux_over_errorGaia EDR3_ G band signal-to-noisereal
gaia_phot_g_mean_magGaia EDR3_ G band magreal
gaia_phot_g_n_obsGaia EDR3_ G band number of observationssmallint
gaia_phot_rp_mean_flux_over_errorGaia EDR3_ RP signal-to-noisereal
gaia_phot_rp_mean_magGaia EDR3_ RP magreal
gaia_phot_rp_n_obsGaia EDR3_ RP number of observationssmallint
gaia_phot_variable_flagGaia EDR3_ photometric variable flagsmallint
galdepth_gAs for psfdepth_g but for a galaxy (0.45s exp, round) detection sensitivityreal
galdepth_iAs for psfdepth_i but for a galaxy (0.45s exp, round) detection sensitivityreal
galdepth_rAs for psfdepth_r but for a galaxy (0.45s exp, round) detection sensitivityreal
galdepth_zAs for psfdepth_z but for a galaxy (0.45s exp, round) detection sensitivityreal
glatGalactic Latitudedouble
glonGalactic Longitudedouble
htm9HTM index (order 9 => ~10 arcmin size)INTEGER
i_zComputed (i-z) colorreal
ls_idUnique LS object IDbigint
mag_gConverted g magnitudereal
mag_iConverted i magnitudereal
mag_rConverted r magnitudereal
mag_w1Converted W1 magnitudereal
mag_w2Converted W2 magnitudereal
mag_w3Converted W3 magnitudereal
mag_w4Converted W4 magnitudereal
mag_zConverted g magnitudereal
maskbitsBitwise mask indicating that an object touches a pixel in the coadd/*/*/*maskbits* maps, as cataloged on the DR10 bitmasks page_integer
mjd_maxMaximum Modified Julian Date of observations used to construct the model of this objectdouble
mjd_minMinimum Modified Julian Date of observations used to construct the model of this objectdouble
mw_transmission_gGalactic transmission in g filter in linear units [0, 1]real
mw_transmission_iGalactic transmission in i filter in linear units [0, 1]real
mw_transmission_rGalactic transmission in r filter in linear units [0, 1]real
mw_transmission_w1Galactic transmission in W1 filter in linear units [0, 1]real
mw_transmission_w2Galactic transmission in W2 filter in linear units [0, 1]real
mw_transmission_w3Galactic transmission in W3 filter in linear units [0, 1]real
mw_transmission_w4Galactic transmission in W4 filter in linear units [0, 1]real
mw_transmission_zGalactic transmission in z filter in linear units [0, 1]real
nea_gNoise equivalent area_ in g.real
nea_iNoise equivalent area_ in i.real
nea_rNoise equivalent area_ in r.real
nea_zNoise equivalent area_ in z.real
nest4096HEALPIX index (Nsides 4096, Nest scheme => ~52 arcsec sizeINTEGER
ngood_gNumber of good (unmasked) images that contribute in g (this quantity is consistent with the nexp maps in the image stacks_)smallint
ngood_iNumber of good (unmasked) images that contribute in i (this quantity is consistent with the nexp maps in the image stacks_)smallint
ngood_rNumber of good (unmasked) images that contribute in r (this quantity is consistent with the nexp maps in the image stacks_)smallint
ngood_zNumber of good (unmasked) images that contribute in z (this quantity is consistent with the nexp maps in the image stacks_)smallint
nobs_gNumber of images that contribute to the central pixel in g filter for this object (not profile-weighted)smallint
nobs_iNumber of images that contribute to the central pixel in i filter for this object (not profile-weighted)smallint
nobs_rNumber of images that contribute to the central pixel in r filter for this object (not profile-weighted)smallint
nobs_w1Number of images that contribute to the central pixel in W1 filter for this object (not profile-weighted)smallint
nobs_w2Number of images that contribute to the central pixel in W2 filter for this object (not profile-weighted)smallint
nobs_w3Number of images that contribute to the central pixel in W3 filter for this object (not profile-weighted)smallint
nobs_w4Number of images that contribute to the central pixel in W4 filter for this object (not profile-weighted)smallint
nobs_zNumber of images that contribute to the central pixel in z filter for this object (not profile-weighted)smallint
objidCatalog object number within this brick; a unique identifier hash is release,brickid,objid; objid spans [0,N-1] and is contiguously enumerated within each brickinteger
parallaxReference catalog parallaxreal
parallax_ivarReference catalog inverse-variance on parallaxreal
pmdecReference catalog proper motion in the Dec directionreal
pmdec_ivarReference catalog inverse-variance on pmdecreal
pmraReference catalog proper motion in the RA directionreal
pmra_ivarReference catalog inverse-variance on pmrareal
psfdepth_gFor a 5-sigma point source detection limit in g, 5/(sqrt psfdepth_g) gives flux in nanomaggies and -2.5[log10(5 / (sqrt psfdepth_g)) - 9] gives corresponding AB magnitudereal
psfdepth_iFor a 5-sigma point source detection limit in i, 5/(sqrt psfdepth_i) gives flux in nanomaggies and -2.5[log10(5 / (sqrt psfdepth_i)) - 9] gives corresponding AB magnitudereal
psfdepth_rFor a 5-sigma point source detection limit in r, 5/(sqrt psfdepth_r) gives flux in nanomaggies and -2.5[log10(5 / (sqrt psfdepth_r)) - 9] gives corresponding AB magnitudereal
psfdepth_w1As for psfdepth_g (and also on the AB system) but for WISE W1real
psfdepth_w2As for psfdepth_g (and also on the AB system) but for WISE W2real
psfdepth_w3As for psfdepth_g (and also on the AB system) but for WISE W3real
psfdepth_w4As for psfdepth_g (and also on the AB system) but for WISE W4real
psfdepth_zFor a 5-sigma point source detection limit in z, 5/(sqrt psfdepth_z) gives flux in nanomaggies and -2.5[log10(5 / (sqrt psfdepth_z)) - 9] gives corresponding AB magnitudereal
psfsize_gWeighted average PSF FWHM in the g bandreal
psfsize_iWeighted average PSF FWHM in the i bandreal
psfsize_rWeighted average PSF FWHM in the r bandreal
psfsize_zWeighted average PSF FWHM in the z bandreal
r_iComputed (r-i) colorreal
r_zComputed (r-z) colorreal
raRight ascension at equinox J2000double
ra_ivarInverse variance of RA (no cosine term!), excluding astrometric calibration errorsreal
random_idRandom ID in the range 0.0 => 100.0real
rchisq_gProfile-weighted |chi|^2 of model fit normalized by the number of pixels in greal
rchisq_iProfile-weighted |chi|^2 of model fit normalized by the number of pixels in ireal
rchisq_rProfile-weighted |chi|^2 of model fit normalized by the number of pixels in rreal
rchisq_w1Profile-weighted |chi|^2 of model fit normalized by the number of pixels in W1real
rchisq_w2Profile-weighted |chi|^2 of model fit normalized by the number of pixels in W2real
rchisq_w3Profile-weighted |chi|^2 of model fit normalized by the number of pixels in W3real
rchisq_w4Profile-weighted |chi|^2 of model fit normalized by the number of pixels in W4real
rchisq_zProfile-weighted |chi|^2 of model fit normalized by the number of pixels in zreal
ref_catReference catalog source for this star: T2 for Tycho-2_, GE for Gaia EDR3_, L3 for the SGA_, empty otherwisevarchar
ref_epochReference catalog reference epoch (eg, 2015.5 for Gaia EDR3_)real
ref_idReference catalog identifier for this star; Tyc1*1,000,000+Tyc2*10+Tyc3 for Tycho2; sourceid for Gaia EDR3_ and SGA_bigint
releaseInteger denoting the camera and filter set used, which will be unique for a given processing run of the data (as documented here_)smallint
ring256HEALPIX index (Nsides 256, Ring scheme => ~14 arcmin size)INTEGER
sersicPower-law index for the Sersic profile model (type=SER)real
sersic_ivarInverse variance of sersicreal
shape_e1Ellipticity component 1 of galaxy model for galaxy type typereal
shape_e1_ivarInverse variance of shape_e1real
shape_e2Ellipticity component 2 of galaxy model for galaxy type typereal
shape_e2_ivarInverse variance of shape_e2real
shape_rHalf-light radius of galaxy model for galaxy type type (>0)real
shape_r_ivarInverse variance of shape_rreal
snr_gSignal-to-Noise ratio in greal
snr_iSignal-to-Noise ratio in ireal
snr_rSignal-to-Noise ratio in rreal
snr_w1Signal-to-Noise ratio in W1real
snr_w2Signal-to-Noise ratio in W2real
snr_w3Signal-to-Noise ratio in W3real
snr_w4Signal-to-Noise ratio in W4real
snr_zSignal-to-Noise ratio in zreal
typeMorphological model: PSF=stellar, REX=round exponential galaxy, DEV=deVauc, EXP=exponential, SER=Sersic, DUP=Gaia source fit by different model. See also the larger description_.varchar
w1_w2Computed (w1-w2) colorreal
w2_w3Computed (w2-w3) colorreal
w3_w4Computed (w3-w4) colorreal
wise_coadd_idunWISE coadd brick name (corresponding to the, *e.g.*, legacysurvey--image-W1.fits.fz coadd file_) for the center of each objectvarchar
wise_xX position of coordinates in the brick image stack that corresponds to wise_coadd_id (see the DR9 updates page_ for transformations between wise_x and bx)real
wise_yY position of coordinates in the brick image stack that corresponds to wise_coadd_id (see the DR9 updates page_ for transformations between wise_y and by)real
wisemask_w1W1 bitmask as cataloged on the DR10 bitmasks page_smallint
wisemask_w2W2 bitmask as cataloged on the DR10 bitmasks page_smallint
z_w1Computed (z-w1) colorreal