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Table: ls_dr5.galaxy
(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 | SMALLINT |
| allmask_r | Bitwise mask set if the central pixel from all images satisfy each condition in R | SMALLINT |
| allmask_z | Bitwise mask set if the central pixel from all images satisfy each condition in Z | SMALLINT |
| anymask_g | Bitwise mask set if the central pixel from any image satisfy each condition in G | SMALLINT |
| anymask_r | Bitwise mask set if the central pixel from any image satisfy each condition in R | SMALLINT |
| anymask_z | Bitwise mask set if the central pixel from any image satisfy each condition in Z | SMALLINT |
| brick_primary | T if the object is within the brick boundary | SMALLINT |
| brickid | Brick ID [1,662174] | INTEGER |
| brickname | Name of brick, encoding the brick sky position | CHAR |
| bx | X position (0-indexed) of coordinates in brick image stack | REAL |
| by | Y position (0-indexed) of coordinates in brick image stack | REAL |
| dchisq_1 | Difference in X^2 between successfully more-complex model fits | REAL |
| dchisq_2 | Difference in X^2 between successfully more-complex model fits | REAL |
| dchisq_3 | Difference in X^2 between successfully more-complex model fits | REAL |
| dchisq_4 | Difference in X^2 between successfully more-complex model fits | REAL |
| dchisq_5 | Difference in X^2 between successfully more-complex model fits | REAL |
| dec | Declination (ICRS) | DOUBLE |
| dec_ivar | Inverse variance of Dec, excluding astrometric calibration errors | REAL |
| decals_id | Unique DECaLS object ID | BIGINT |
| dered_flux_g | Dereddened G-band flux | REAL |
| dered_flux_r | Dereddened R-band flux | REAL |
| dered_flux_w1 | Dereddened W1 flux | REAL |
| dered_flux_w2 | Dereddened W1 flux | REAL |
| dered_flux_w3 | Dereddened W1 flux | REAL |
| dered_flux_w4 | Dereddened W1 flux | REAL |
| dered_flux_z | Dereddened Z-band flux | REAL |
| dered_mag_g | Dereddened G-band magnitude | REAL |
| dered_mag_r | Dereddened R-band magnitude | REAL |
| dered_mag_w1 | Dereddened W1 magnitude | REAL |
| dered_mag_w2 | Dereddened W2 magnitude | REAL |
| dered_mag_w3 | Dereddened W3 magnitude | REAL |
| dered_mag_w4 | Dereddened W4 magnitude | REAL |
| dered_mag_z | Dereddened Z-band magnitude | REAL |
| ebv | Galactic extinction E(B-V) reddening from SFD98, used to compute DECAM_MW_TRANSMISSION and WISE_MW_TRANSMISSION | REAL |
| elat | Ecliptic Latitude | DOUBLE |
| elon | Ecliptic Longitude | DOUBLE |
| flux_g | DECam model flux in (g) | REAL |
| flux_ivar_g | Inverse variance of FLUX_G | REAL |
| flux_ivar_r | Inverse variance of FLUX_R | REAL |
| flux_ivar_z | Inverse variance of FLUX_Z | REAL |
| flux_r | DECam model flux in (r) | REAL |
| flux_z | DECam model flux in (z) | REAL |
| fracdev | Fraction of model in deVauc [0,1] | REAL |
| fracdev_ivar | Inverse variance of FRACDEV | REAL |
| fracflux_g | DECam model flux in (g) | REAL |
| fracflux_r | DECam model flux in (r) | REAL |
| fracflux_z | DECam model flux in (z) | REAL |
| fracin_g | Fraction of a sources flux within the blob, near unity for real sources | REAL |
| fracin_r | Fraction of a sources flux within the blob, near unity for real sources | REAL |
| fracin_z | Fraction of a sources flux within the blob, near unity for real sources | REAL |
| fracmasked_g | Profile-weighted fraction of pixels masked from all observations of this object, strictly between [0,1] | REAL |
| fracmasked_r | Profile-weighted fraction of pixels masked from all observations of this object, strictly between [0,1] | REAL |
| fracmasked_z | Profile-weighted fraction of pixels masked from all observations of this object, strictly between [0,1] | REAL |
| g_r | Computed (g-r) color | REAL |
| galdepth_g | As for DEPTH_G but for a galaxy (0.45arcsec exp. round) detection sensitivity | REAL |
| galdepth_r | As for DEPTH_R but for a galaxy (0.45arcsec exp. round) detection sensitivity | REAL |
| galdepth_z | As for DEPTH_Z but for a galaxy (0.45arcsec exp. round) detection sensitivity | REAL |
| glat | Galactic Latitude | DOUBLE |
| glon | Galactic Longitude | DOUBLE |
| htm9 | HTM index (order 9 => ~10 arcmin size) | BIGINT |
| mag_g | Converted G magnitude | REAL |
| mag_r | Converted R magnitude | REAL |
| mag_w1 | W1 magnitude | REAL |
| mag_w2 | W2 magnitude | REAL |
| mag_w3 | W3 magnitude | REAL |
| mag_w4 | W4 magnitude | REAL |
| mag_z | Converted Z magnitude | REAL |
| mjd_max | Max MJD of image in stack | DOUBLE |
| mjd_min | Min MJD of image in stack | DOUBLE |
| mw_transmission_g | Galactic transmission in (g) filters in linear units [0,1] | REAL |
| mw_transmission_r | Galactic transmission in (r) filters in linear units [0,1] | REAL |
| mw_transmission_z | Galactic transmission in (z) filters in linear units [0,1] | REAL |
| nest4096 | HEALPIX index (Nsides 4096, Nest scheme => ~52 arcsec size | INTEGER |
| nobs_g | No. of images that contribute to central pixel in G filter (not profile-weighted) | SMALLINT |
| nobs_r | No. of images that contribute to central pixel in R filter (not profile-weighted) | SMALLINT |
| nobs_z | No. of images that contribute to central pixel in Z filter (not profile-weighted) | SMALLINT |
| objid | Catalog object number within this brick; a unique identifier hash is BRICKID,OBJID; OBJID spans [0,N-1] and is contiguously enumerated within each blob | INTEGER |
| psfdepth_g | For a 5-sigma point source detection in g, 5/sqrt(DEPTH_G) gives flux in nanomaggies and -2.5*log10((5/sqrt(DEPTH_G)-9) gives corresponging magnitude | REAL |
| psfdepth_r | For a 5-sigma point source detection in r, 5/sqrt(DEPTH_R) gives flux in nanomaggies and -2.5*log10((5/sqrt(DEPTH_R)-9) gives corresponging magnitude | REAL |
| psfdepth_z | For a 5-sigma point source detection in z, 5/sqrt(DEPTH_Z) gives flux in nanomaggies and -2.5*log10((5/sqrt(DEPTH_Z)-9) gives corresponging magnitude | REAL |
| psfsize_g | Weighted average PSF FWHM in the g 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_z | Computed (r-z) color | REAL |
| ra | Right Ascension (ICRS) | DOUBLE |
| ra_ivar | Inverse variance of RA, excluding astrometric calibration errors | REAL |
| random_id | Random ID in the range 0.0 => 100.0 | REAL |
| rchisq_g | Profile-weighted X^2 of model fit normalized by the number of pixels | REAL |
| rchisq_r | Profile-weighted X^2 of model fit normalized by the number of pixels | REAL |
| rchisq_z | Profile-weighted X^2 of model fit normalized by the number of pixels | REAL |
| ring256 | HEALPIX index (Nsides 256, Ring scheme => ~14 arcmin size) | INTEGER |
| shapedev_e1 | Ellipticity component 1 | REAL |
| shapedev_e1_ivar | Inverse variance of SHAPEDEV_E1 | REAL |
| shapedev_e2 | Ellipticity component 1 | REAL |
| shapedev_e2_ivar | Inverse variance of SHAPEDEV_E2 | REAL |
| shapedev_r | Half-light radius of deVaucouleurs model (>0) | REAL |
| shapedev_r_ivar | Inverse variance of SHAPEDEV_R | REAL |
| shapeexp_e1 | Ellipticity component 1 | REAL |
| shapeexp_e1_ivar | Inverse variance of SHAPEEXP_E1 | REAL |
| shapeexp_e2 | Ellipticity component 2 | REAL |
| shapeexp_e2_ivar | Inverse variance of SHAPEEXP_E2 | REAL |
| shapeexp_r | Half-light radius of exponential model (>0) | REAL |
| shapeexp_r_ivar | Inverse variance of SHAPEEXP_R | REAL |
| snr_g | Signal-to-Noise ratio in G | 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, EXP=exponential, DEV=deVauc, COMP=composite | CHAR |
| w1_w2 | Computed (w1-w2) color | REAL |
| w2_w3 | Computed (w2-w3) color | REAL |
| w3_w4 | Computed (w3-d4) color | REAL |
| z_w1 | Computed (z-w1 color | REAL |
