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Catalog Creation

Column Descriptions

SQL CasJobs Access and Examples

Description of Catalog Columns

(Based on Appendix 1 in Bianchi, Conti & Shiao 2013, J. Adv. Space Res., arXiv1312.3281B).

Note that column names in bold are columns users will most often want to retrieve, and are highlighted for convenience.

Column Name	Description
photoextractid	Pointer to photoExtract Table (identifier of original observation).
mpstype	Which survey (i.e, "AIS" or "MIS").
avaspra	R.A. of center of field where object was measured.
avaspdec	Decl. of center of field where object was measured.
objid	GALEX identifier for the source.
ra	Source's Right Ascension (degrees).
dec	Source's Declination (degrees).
glon	Source's Galactic longitude (degrees).
glat	Source's Galactic latitude (degrees).
tilenum	"Tile" number.
img	Image number (exposure # for _visits).
subvisit	Number of subvisit if exposure was divided.
fov_radius	Distance of source from center of the field in which it was measured.
type	Obs.type (0=single,1=multi).
band	Band number (1=nuv,2=fuv,3=both).
e_bv	E(B-V) Galactic Reddening (from Schlegel et al. 1998 maps).
istherespectrum	Does this object have a (GALEX) spectrum? Yes (1), No (0).
chkobj_type	Astrometry check type.
fuv_mag	FUV calibrated magnitude.
fuv_magerr	FUV calibrated magnitude error.
nuv_mag	NUV calibrated magnitude.
nuv_magerr	FUV calibrated magnitude error.
fuv_mag_auto	FUV Kron-like elliptical aperture magnitude.
fuv_magerr_auto	FUV RMS error for AUTO magnitude.
nuv_mag_auto	NUV Kron-like elliptical aperture magnitude.
nuv_magerr_auto	NUV RMS error for AUTO magnitude.
fuv_mag_aper_4	FUV Magnitude aperture ( 8 pxl ).
fuv_magerr_aper_4	FUV Magnitude aperture error ( 8 pxl ).
nuv_mag_aper_4	NUV Magnitude aperture ( 8 pxl ).
nuv_magerr_aper_4	NUV Magnitude aperture ( 8 pxl ) error.
fuv_mag_aper_6	FUV Magnitude aperture ( 17 pxl ).
fuv_magerr_aper_6	FUV Magnitude aperture ( 17 pxl ) error.
nuv_mag_aper_6	NUV Magnitude aperture ( 17 pxl ).
nuv_magerr_aper_6	NUV Magnitude aperture ( 17 pxl ) error.
fuv_artifact	FUV artifact flag (logical OR near source).
nuv_artifact	NUV artifact flag (logical OR near source).
fuv_flags	Extraction flags.
nuv_flags	Extraction flags.
fuv_flux	FUV calibrated flux (micro Jansky).
fuv_fluxerr	FUV calibrated flux (micro Jansky) error.
nuv_flux	NUV calibrated flux (micro Jansky).
nuv_fluxerr	NUV calibrated flux (micro Jansky) error.
fuv_x_image	Object position along x.
fuv_y_image	Object position along y.
nuv_x_image	Object position along x.
nuv_y_image	Object position along y.
fuv_fwhm_image	FUV FWHM assuming a gaussian core.
nuv_fwhm_image	NUV FWHM assuming a gaussian core.
fuv_fwhm_world	FUV FWHM assuming a gaussian core (WORLD units).
nuv_fwhm_world	NUV FWHM assuming a gaussian core (WORLD units).
nuv_class_star	S/G classifier output.
fuv_class_star	S/G classifier output.
nuv_ellipticity	1 - B_IMAGE/A_IMAGE.
fuv_ellipticity	1 - B_IMAGE/A_IMAGE.
nuv_theta_J2000	Position angle (east of north) (J2000).
nuv_errtheta_J2000	Position angle error (east of north) (J2000).
fuv_theta_J2000	Position angle (east of north) (J2000).
fuv_errtheta_J2000	Position angle error (east of north) (J2000).
fuv_ncat_fwhm_image	FUV FWHM_IMAGE value from -fd-ncat.fits (px).
fuv_ncat_flux_radius_3	FUV FLUX_RADIUS #3 (-fd-ncat)(px)[0.80].
nuv_kron_radius	Kron apertures in units of A or B.
nuv_a_world	Profile RMS along major axis (world units).
nuv_b_world	Profile RMS along minor axis (world units).
fuv_a_world	Profile RMS along major axis (world units).
fuv_kron_radius	Kron apertures in units of A or B.
fuv_b_world	Profile RMS along minor axis (world units).

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