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Table: ls_dr10.tractor
(The bold columns are indexed columns)
| Column Name | Description | Datatype |
|---|---|---|
| allmask_g | Bitwise mask set if the central pixel from all images satisfy each condition in g as cataloged on the DR10 bitmasks page_ | SMALLINT |
| allmask_i | Bitwise mask set if the central pixel from all images satisfy each condition in i as cataloged on the DR10 bitmasks page_ | SMALLINT |
| allmask_r | Bitwise mask set if the central pixel from all images satisfy each condition in r as cataloged on the DR10 bitmasks page_ | SMALLINT |
| allmask_z | Bitwise mask set if the central pixel from all images satisfy each condition in z as cataloged on the DR10 bitmasks page_ | SMALLINT |
| anymask_g | Bitwise mask set if the central pixel from any image satisfies each condition in g as cataloged on the DR10 bitmasks page_ | SMALLINT |
| anymask_i | Bitwise mask set if the central pixel from any image satisfies each condition in i as cataloged on the DR10 bitmasks page_ | SMALLINT |
| anymask_r | Bitwise mask set if the central pixel from any image satisfies each condition in r as cataloged on the DR10 bitmasks page_ | SMALLINT |
| anymask_z | Bitwise mask set if the central pixel from any image satisfies each condition in z as cataloged on the DR10 bitmasks page_ | SMALLINT |
| blob_nea_g | Blob-masked noise equivalent area_ in g. | REAL |
| blob_nea_i | Blob-masked noise equivalent area_ in i. | REAL |
| blob_nea_r | Blob-masked noise equivalent area_ in r. | REAL |
| blob_nea_z | Blob-masked noise equivalent area_ in z. | REAL |
| brick_primary | True if the object is within the brick boundary | SMALLINT |
| brickid | Brick ID [1,662174] | INTEGER |
| brickname | Name of brick, encoding the brick sky position, eg 1126p222 near RA=112.6, Dec=+22.2 | VARCHAR |
| bx | X position (0-indexed) of coordinates in the brick image stack (*i.e.* in the *e.g.* legacysurvey- | REAL |
| by | Y position (0-indexed) of coordinates in brick image stack | REAL |
| dchisq_1 | Difference in |chi|^2 between successively more-complex model fits: PSF, REX, DEV, EXP, SER. The difference is versus no source. | REAL |
| dchisq_2 | Difference in |chi|^2 between successively more-complex model fits: PSF, REX, DEV, EXP, SER. The difference is versus no source. | REAL |
| dchisq_3 | Difference in |chi|^2 between successively more-complex model fits: PSF, REX, DEV, EXP, SER. The difference is versus no source. | REAL |
| dchisq_4 | Difference in |chi|^2 between successively more-complex model fits: PSF, REX, DEV, EXP, SER. The difference is versus no source. | REAL |
| dchisq_5 | Difference in |chi|^2 between successively more-complex model fits: PSF, REX, DEV, EXP, SER. The difference is versus no source. | REAL |
| dec | Declination at equinox J2000 | DOUBLE |
| dec_ivar | Inverse variance of DEC, excluding astrometric calibration errors | REAL |
| dered_flux_g | Dereddened g band flux | REAL |
| dered_flux_i | Dereddened i band flux | REAL |
| dered_flux_r | Dereddened r band flux | REAL |
| dered_flux_w1 | Dereddened w1 band flux | REAL |
| dered_flux_w2 | Dereddened w2 band flux | REAL |
| dered_flux_w3 | Dereddened w3 band flux | REAL |
| dered_flux_w4 | Dereddened w4 band flux | REAL |
| dered_flux_z | Dereddened z band flux | REAL |
| dered_mag_g | Dereddened g-band magnitude | REAL |
| dered_mag_i | Dereddened i-band magnitude | REAL |
| dered_mag_r | Dereddened r-band magnitude | REAL |
| dered_mag_w1 | Dereddened w1-band magnitude | REAL |
| dered_mag_w2 | Dereddened w2-band magnitude | REAL |
| dered_mag_w3 | Dereddened w3-band magnitude | REAL |
| dered_mag_w4 | Dereddened w4-band magnitude | REAL |
| dered_mag_z | Dereddened z-band magnitude | REAL |
| ebv | Galactic extinction E(B-V) reddening from SFD98_, used to compute the mw_transmission_ columns | REAL |
| elat | Ecliptic Latitude | DOUBLE |
| elon | Ecliptic Longitude | DOUBLE |
| fiberflux_g | Predicted g-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeing | REAL |
| fiberflux_i | Predicted i-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeing | REAL |
| fiberflux_r | Predicted r-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeing | REAL |
| fiberflux_z | Predicted z-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeing | REAL |
| fibertotflux_g | Predicted g-band flux within a fiber of diameter 1.5 arcsec from all sources at this location in 1 arcsec Gaussian seeing | REAL |
| fibertotflux_i | Predicted i-band flux within a fiber of diameter 1.5 arcsec from all sources at this location in 1 arcsec Gaussian seeing | REAL |
| fibertotflux_r | Predicted r-band flux within a fiber of diameter 1.5 arcsec from all sources at this location in 1 arcsec Gaussian seeing | REAL |
| fibertotflux_z | Predicted z-band flux within a fiber of diameter 1.5 arcsec from all sources at this location in 1 arcsec Gaussian seeing | REAL |
| fitbits | Bitwise mask detailing pecularities of how an object was fit, as cataloged on the DR10 bitmasks page_ | SMALLINT |
| flux_g | model flux in g | REAL |
| flux_i | model flux in i | REAL |
| flux_ivar_g | Inverse variance of flux_g | REAL |
| flux_ivar_i | Inverse variance of flux_i | REAL |
| flux_ivar_r | Inverse variance of flux_r | REAL |
| flux_ivar_w1 | Inverse variance of flux_w1 (AB system) | REAL |
| flux_ivar_w2 | Inverse variance of flux_w2 (AB) | REAL |
| flux_ivar_w3 | Inverse variance of flux_w3 (AB) | REAL |
| flux_ivar_w4 | Inverse variance of flux_w4 (AB) | REAL |
| flux_ivar_z | Inverse variance of flux_z | REAL |
| flux_r | model flux in r | REAL |
| flux_w1 | WISE model flux in W1 (AB system) | REAL |
| flux_w2 | WISE model flux in W2 (AB) | REAL |
| flux_w3 | WISE model flux in W3 (AB) | REAL |
| flux_w4 | WISE model flux in W4 (AB) | REAL |
| flux_z | model flux in z | REAL |
| fracflux_g | Profile-weighted fraction of the flux from other sources divided by the total flux in g (typically [0,1]) | REAL |
| fracflux_i | Profile-weighted fraction of the flux from other sources divided by the total flux in i (typically [0,1]) | REAL |
| fracflux_r | Profile-weighted fraction of the flux from other sources divided by the total flux in r (typically [0,1]) | REAL |
| fracflux_w1 | Profile-weighted fraction of the flux from other sources divided by the total flux in W1 (typically [0,1]) | REAL |
| fracflux_w2 | Profile-weighted fraction of the flux from other sources divided by the total flux in W2 (typically [0,1]) | REAL |
| fracflux_w3 | Profile-weighted fraction of the flux from other sources divided by the total flux in W3 (typically [0,1]) | REAL |
| fracflux_w4 | Profile-weighted fraction of the flux from other sources divided by the total flux in W4 (typically [0,1]) | REAL |
| fracflux_z | Profile-weighted fraction of the flux from other sources divided by the total flux in z (typically [0,1]) | REAL |
| fracin_g | Fraction of a source flux within the blob in g, near unity for real sources | REAL |
| fracin_i | Fraction of a source flux within the blob in i, near unity for real sources | REAL |
| fracin_r | Fraction of a source flux within the blob in r, near unity for real sources | REAL |
| fracin_z | Fraction of a source flux within the blob in z, near unity for real sources | REAL |
| fracmasked_g | Profile-weighted fraction of pixels masked from all observations of this object in g, strictly between [0,1] | REAL |
| fracmasked_i | Profile-weighted fraction of pixels masked from all observations of this object in i, strictly between [0,1] | REAL |
| fracmasked_r | Profile-weighted fraction of pixels masked from all observations of this object in r, strictly between [0,1] | REAL |
| fracmasked_z | Profile-weighted fraction of pixels masked from all observations of this object in z, strictly between [0,1] | REAL |
| g_r | Computed (g-r) color | REAL |
| gaia_a_g_val | Gaia EDR3_ line-of-sight extinction in the G band | REAL |
| gaia_astrometric_excess_noise | Gaia EDR3_ astrometric excess noise | REAL |
| gaia_astrometric_excess_noise_sig | Gaia EDR3_ astrometric excess noise uncertainty | REAL |
| gaia_astrometric_n_good_obs_al | Gaia EDR3_ number of good astrometric observations along scan direction | SMALLINT |
| gaia_astrometric_n_obs_al | Gaia EDR3_ number of astrometric observations along scan direction | SMALLINT |
| gaia_astrometric_params_solved | Which astrometric parameters were estimated for a Gaia EDR3_ source | SMALLINT |
| gaia_astrometric_sigma5d_max | Gaia EDR3_ longest semi-major axis of the 5-d error ellipsoid | REAL |
| gaia_astrometric_weight_al | Gaia EDR3_ astrometric weight along scan direction | REAL |
| gaia_duplicated_source | Gaia EDR3_ duplicated source flag | SMALLINT |
| gaia_e_bp_min_rp_val | Gaia EDR3_ line-of-sight reddening E(BP-RP) | REAL |
| gaia_phot_bp_mean_flux_over_error | Gaia EDR3_ BP signal-to-noise | REAL |
| gaia_phot_bp_mean_mag | Gaia EDR3_ BP mag | REAL |
| gaia_phot_bp_n_obs | Gaia EDR3_ BP number of observations | SMALLINT |
| gaia_phot_bp_rp_excess_factor | Gaia EDR3_ BP/RP excess factor | REAL |
| gaia_phot_g_mean_flux_over_error | Gaia EDR3_ G band signal-to-noise | REAL |
| gaia_phot_g_mean_mag | Gaia EDR3_ G band mag | REAL |
| gaia_phot_g_n_obs | Gaia EDR3_ G band number of observations | SMALLINT |
| gaia_phot_rp_mean_flux_over_error | Gaia EDR3_ RP signal-to-noise | REAL |
| gaia_phot_rp_mean_mag | Gaia EDR3_ RP mag | REAL |
| gaia_phot_rp_n_obs | Gaia EDR3_ RP number of observations | SMALLINT |
| gaia_phot_variable_flag | Gaia EDR3_ photometric variable flag | SMALLINT |
| galdepth_g | As for psfdepth_g but for a galaxy (0.45s exp, round) detection sensitivity | REAL |
| galdepth_i | As for psfdepth_i but for a galaxy (0.45s exp, round) detection sensitivity | REAL |
| galdepth_r | As for psfdepth_r but for a galaxy (0.45s exp, round) detection sensitivity | REAL |
| galdepth_z | As for psfdepth_z but for a galaxy (0.45s exp, round) detection sensitivity | REAL |
| glat | Galactic Latitude | DOUBLE |
| glon | Galactic Longitude | DOUBLE |
| htm9 | HTM index (order 9 => ~10 arcmin size) | INTEGER |
| i_z | Computed (i-z) color | REAL |
| ls_id | Unique LS object ID | BIGINT |
| mag_g | Converted g magnitude | REAL |
| mag_i | Converted i magnitude | REAL |
| mag_r | Converted r magnitude | REAL |
| mag_w1 | Converted W1 magnitude | REAL |
| mag_w2 | Converted W2 magnitude | REAL |
| mag_w3 | Converted W3 magnitude | REAL |
| mag_w4 | Converted W4 magnitude | REAL |
| mag_z | Converted g magnitude | REAL |
| maskbits | Bitwise mask indicating that an object touches a pixel in the coadd/*/*/*maskbits* maps, as cataloged on the DR10 bitmasks page_ | INTEGER |
| mjd_max | Maximum Modified Julian Date of observations used to construct the model of this object | DOUBLE |
| mjd_min | Minimum Modified Julian Date of observations used to construct the model of this object | DOUBLE |
| mw_transmission_g | Galactic transmission in g filter in linear units [0, 1] | REAL |
| mw_transmission_i | Galactic transmission in i filter in linear units [0, 1] | REAL |
| mw_transmission_r | Galactic transmission in r filter in linear units [0, 1] | REAL |
| mw_transmission_w1 | Galactic transmission in W1 filter in linear units [0, 1] | REAL |
| mw_transmission_w2 | Galactic transmission in W2 filter in linear units [0, 1] | REAL |
| mw_transmission_w3 | Galactic transmission in W3 filter in linear units [0, 1] | REAL |
| mw_transmission_w4 | Galactic transmission in W4 filter in linear units [0, 1] | REAL |
| mw_transmission_z | Galactic transmission in z filter in linear units [0, 1] | REAL |
| nea_g | Noise equivalent area_ in g. | REAL |
| nea_i | Noise equivalent area_ in i. | REAL |
| nea_r | Noise equivalent area_ in r. | REAL |
| nea_z | Noise equivalent area_ in z. | REAL |
| nest4096 | HEALPIX index (Nsides 4096, Nest scheme => ~52 arcsec size | INTEGER |
| ngood_g | Number of good (unmasked) images that contribute in g (this quantity is consistent with the nexp maps in the image stacks_) | SMALLINT |
| ngood_i | Number of good (unmasked) images that contribute in i (this quantity is consistent with the nexp maps in the image stacks_) | SMALLINT |
| ngood_r | Number of good (unmasked) images that contribute in r (this quantity is consistent with the nexp maps in the image stacks_) | SMALLINT |
| ngood_z | Number of good (unmasked) images that contribute in z (this quantity is consistent with the nexp maps in the image stacks_) | SMALLINT |
| nobs_g | Number of images that contribute to the central pixel in g filter for this object (not profile-weighted) | SMALLINT |
| nobs_i | Number of images that contribute to the central pixel in i filter for this object (not profile-weighted) | SMALLINT |
| nobs_r | Number of images that contribute to the central pixel in r filter for this object (not profile-weighted) | SMALLINT |
| nobs_w1 | Number of images that contribute to the central pixel in W1 filter for this object (not profile-weighted) | SMALLINT |
| nobs_w2 | Number of images that contribute to the central pixel in W2 filter for this object (not profile-weighted) | SMALLINT |
| nobs_w3 | Number of images that contribute to the central pixel in W3 filter for this object (not profile-weighted) | SMALLINT |
| nobs_w4 | Number of images that contribute to the central pixel in W4 filter for this object (not profile-weighted) | SMALLINT |
| nobs_z | Number of images that contribute to the central pixel in z filter for this object (not profile-weighted) | SMALLINT |
| objid | Catalog object number within this brick; a unique identifier hash is release,brickid,objid; objid spans [0,N-1] and is contiguously enumerated within each brick | INTEGER |
| parallax | Reference catalog parallax | REAL |
| parallax_ivar | Reference catalog inverse-variance on parallax | REAL |
| pmdec | Reference catalog proper motion in the Dec direction | REAL |
| pmdec_ivar | Reference catalog inverse-variance on pmdec | REAL |
| pmra | Reference catalog proper motion in the RA direction | REAL |
| pmra_ivar | Reference catalog inverse-variance on pmra | REAL |
| psfdepth_g | For 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 magnitude | REAL |
| psfdepth_i | For 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 magnitude | REAL |
| psfdepth_r | For 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 magnitude | REAL |
| psfdepth_w1 | As for psfdepth_g (and also on the AB system) but for WISE W1 | REAL |
| psfdepth_w2 | As for psfdepth_g (and also on the AB system) but for WISE W2 | REAL |
| psfdepth_w3 | As for psfdepth_g (and also on the AB system) but for WISE W3 | REAL |
| psfdepth_w4 | As for psfdepth_g (and also on the AB system) but for WISE W4 | REAL |
| psfdepth_z | For 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 magnitude | REAL |
| psfsize_g | Weighted average PSF FWHM in the g band | REAL |
| psfsize_i | Weighted average PSF FWHM in the i band | REAL |
| psfsize_r | Weighted average PSF FWHM in the r band | REAL |
| psfsize_z | Weighted average PSF FWHM in the z band | REAL |
| r_i | Computed (r-i) color | REAL |
| r_z | Computed (r-z) color | REAL |
| ra | Right ascension at equinox J2000 | DOUBLE |
| ra_ivar | Inverse variance of RA (no cosine term!), excluding astrometric calibration errors | REAL |
| random_id | Random ID in the range 0.0 => 100.0 | REAL |
| rchisq_g | Profile-weighted |chi|^2 of model fit normalized by the number of pixels in g | REAL |
| rchisq_i | Profile-weighted |chi|^2 of model fit normalized by the number of pixels in i | REAL |
| rchisq_r | Profile-weighted |chi|^2 of model fit normalized by the number of pixels in r | REAL |
| rchisq_w1 | Profile-weighted |chi|^2 of model fit normalized by the number of pixels in W1 | REAL |
| rchisq_w2 | Profile-weighted |chi|^2 of model fit normalized by the number of pixels in W2 | REAL |
| rchisq_w3 | Profile-weighted |chi|^2 of model fit normalized by the number of pixels in W3 | REAL |
| rchisq_w4 | Profile-weighted |chi|^2 of model fit normalized by the number of pixels in W4 | REAL |
| rchisq_z | Profile-weighted |chi|^2 of model fit normalized by the number of pixels in z | REAL |
| ref_cat | Reference catalog source for this star: T2 for Tycho-2_, GE for Gaia EDR3_, L3 for the SGA_, empty otherwise | VARCHAR |
| ref_epoch | Reference catalog reference epoch (eg, 2015.5 for Gaia EDR3_) | REAL |
| ref_id | Reference catalog identifier for this star; Tyc1*1,000,000+Tyc2*10+Tyc3 for Tycho2; sourceid for Gaia EDR3_ and SGA_ | BIGINT |
| release | Integer denoting the camera and filter set used, which will be unique for a given processing run of the data (as documented here_) | SMALLINT |
| ring256 | HEALPIX index (Nsides 256, Ring scheme => ~14 arcmin size) | INTEGER |
| sersic | Power-law index for the Sersic profile model (type=SER) | REAL |
| sersic_ivar | Inverse variance of sersic | REAL |
| shape_e1 | Ellipticity component 1 of galaxy model for galaxy type type | REAL |
| shape_e1_ivar | Inverse variance of shape_e1 | REAL |
| shape_e2 | Ellipticity component 2 of galaxy model for galaxy type type | REAL |
| shape_e2_ivar | Inverse variance of shape_e2 | REAL |
| shape_r | Half-light radius of galaxy model for galaxy type type (>0) | REAL |
| shape_r_ivar | Inverse variance of shape_r | REAL |
| snr_g | Signal-to-Noise ratio in g | REAL |
| snr_i | Signal-to-Noise ratio in i | REAL |
| snr_r | Signal-to-Noise ratio in r | REAL |
| snr_w1 | Signal-to-Noise ratio in W1 | REAL |
| snr_w2 | Signal-to-Noise ratio in W2 | REAL |
| snr_w3 | Signal-to-Noise ratio in W3 | REAL |
| snr_w4 | Signal-to-Noise ratio in W4 | REAL |
| snr_z | Signal-to-Noise ratio in z | REAL |
| type | Morphological 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_w2 | Computed (w1-w2) color | REAL |
| w2_w3 | Computed (w2-w3) color | REAL |
| w3_w4 | Computed (w3-w4) color | REAL |
| wise_coadd_id | unWISE coadd brick name (corresponding to the, *e.g.*, legacysurvey- | VARCHAR |
| wise_x | X 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_y | Y 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_w1 | W1 bitmask as cataloged on the DR10 bitmasks page_ | SMALLINT |
| wisemask_w2 | W2 bitmask as cataloged on the DR10 bitmasks page_ | SMALLINT |
| z_w1 | Computed (z-w1) color | REAL |
