Choose a database in the left panel then select the table you want!

Table: des_sva1.gold_im3shape
(The bold columns are indexed columns)
Column NameDescriptionDatatype
chi2The chi^2 per pixel of the fitted galaxy model.REAL
coadd_objects_idUnique object identifier (can be used to match against other SVA1 catalogs)BIGINT
dec_shiftThe shift in the nominal centroid position of the galaxy model relative to the DEC position from the SVA1 Gold catalog. (arcsec)REAL
e_1The raw (biased) shear estimator.DOUBLE
e_2The raw (biased) shear estimator.DOUBLE
error_flagDescribes potential problems with the shear estimate. Objects with non-zero ERROR_FLAG should not be used for any scientific analysis.INTEGER
flux_rAn estimate of the r-band flux (in ADU) that comes out of the same fitting process as was used for the shapes. This should only be used as a diagnostic. For accurate, calibrated fluxes, users should use the flux values in the Gold catalogs.REAL
info_flagDescribes potential problems with the shear estimate. Objects with non-zero INFO_FLAG may be acceptable for some use cases, but the conservative selection is to only use objects with INFO_FLAG == 0.INTEGER
is_bulge1 if the model used was a bulge model, 0 if it was a disc model.INTEGER
likelihoodThe likelihood of the fitted galaxy model.REAL
mean_psf_e1The mean measured ellipticity and size of the PSF for the different exposures that went into the shear estimates for this galaxy.DOUBLE
mean_psf_e2The mean measured ellipticity and size of the PSF for the different exposures that went into the shear estimates for this galaxy.DOUBLE
mean_psf_fwhmThe mean measured ellipticity and size of the PSF for the different exposures that went into the shear estimates for this galaxy.REAL
mean_rgpp_rpThe mean value of the radius of the observed object divided by the radius of the PSF among the different observations of the galaxy.REAL
n_exposureThe number of exposures used for constraining the model of the galaxy.INTEGER
nbc_c1Noise Bias Correction. The additive bias correction for e_1.DOUBLE
nbc_c2Noise Bias Correction. The additive bias correction for e_2.DOUBLE
nbc_mNoise Bias Correction. The multiplicative bias correction.DOUBLE
ra_shiftThe shift in the nominal centroid position of the galaxy model relative to the RA position from the SVA1 Gold catalog. (arcsec)REAL
radiusAn estimate of the radius of the galaxy in arcsec.REAL
snr_rThe 'roundified' S/N estimate. See Section 7.1 of Jarvis et al, 2015 for an explanation of the differences between SNR_W and SNR_R estimates. In particular, it is recommended that any selection involving S/N beyond the cuts we have already applied should use SNR_W, not SNR_R. (This is different for ngmix!)REAL
snr_wThe standard optimal weight S/N estimate. See Section 7.1 of Jarvis et al, 2015 for an explanation of the differences between SNR_W and SNR_R estimates. In particular, it is recommended that any selection involving S/N beyond the cuts we have already applied should use SNR_W, not SNR_R. (This is different for ngmix!)REAL
stamp_sizeThe size (in pixels) of the postage stamp images used for this galaxy.INTEGER
wThe recommended weight to use for each galaxy. See Section 7.3.4 in Jarvis et al, 2015 for the method used to construct the weights.DOUBLE