ra: Right Ascension of the source (J2000 epoch, in degrees).
dec: Declination of the source (J2000 epoch, in degrees).
healpix: HEALPix pixel index (commonly at order 10–12) used for efficient spatial indexing on the sphere.
fits_data: Reference to the associated FITS image file or data product 

fuv_flux: Measured FUV flux (units: uJy).
fuv_fluxerr: 1σ uncertainty on fuv_flux.
fuv_mag: AB magnitude in the FUV band.
fuv_magerr: 1σ uncertainty on fuv_mag.
fuv_artifact: Artifact flag for the FUV detection (e.g., edge, saturation, ghost, diffraction spike). Non-zero values indicate potential issues.

nuv_flux: Measured NUV flux (units: uJy).
nuv_fluxerr: 1σ uncertainty on nuv_flux.
nuv_mag: AB magnitude in the NUV band.
nuv_magerr: 1σ uncertainty on nuv_mag.
nuv_artifact: Artifact flag for the NUV detection (same convention as fuv_artifact).

E_bv: Estimated Milky Way reddening value E(B−V) at the source position (from e.g., Schlegel et al. 1998 or updated dust maps). Used to correct for Galactic extinction.


(link:https://cdsarc.cds.unistra.fr/ftp/II/312/ReadMe)