SMGPS extended source catalogue    (Bordiu+, 2025)
================================================================================

Description:
    Name, coordinates, bounding boxes, morphological tags, flux estimates and 
    related uncertainties and crossmatch information for 16,534 extended radio
    sources (area larger than 5 beams) identified in the SARAO MeerKAT Galactic
    Plane Survey

--------------------------------------------------------------------------------
Column                Explanation (units)
--------------------------------------------------------------------------------
# tileid              SMGPS tile image name
name                  Source name -internal-
iauName               Source IAU name
npix                  Number of pixels
nnested               Number of nested sources
nnested_ext           Number of extended nested sources
nested_ext            List of extended nested sources
morph_type            Morphology tag (0=EXTENDED, 1=DIFFUSE)
bbox_x                Bounding box x coordinate (pix)
bbox_y                Bounding box y coordinate (pix)
bbox_w                Bounding box width (pix)
bbox_h                Bounding box height (pix)
bbox_rot_x            Rotated bounding box x coordinate (pix)
bbox_rot_y            Rotated bounding box y coordinate (pix)
bbox_rot_w            Rotated bounding box width (pix)
bbox_rot_h            Rotated bounding box height (pix)
bbox_rot_theta        Bounding box rotation angle (deg)
x0                    Centroid x coordinate (pix)
y0                    Centroid y coordinate (pix)
l                     Centroid Galactic longitude (deg)
b                     Centroid Galactic latitude (deg)
ra                    Centroid J2000 Right Ascension (deg)
dec                   Centroid J2000 Declination (deg)
x0_w                  Flux-weighted centroid x coordinate (pix)
y0_w                  Flux-weighted centroid y coordinate (pix)
l_w                   Flux-weighted centroid Galactic longitude (deg)
b_w                   Flux-weighted centroid Galactic latitude (deg)
radius                Bounding box half-diagonal (pix)
radius_wcs            Bounding box half-diagonal (arcmin)
x0_mincircle          Minimum bounding circle centroid x coordinate (pix)
y0_mincircle          Minimum bounding circle centroid y coordinate (pix)
radius_mincircle      Minimum bounding circle radius (pix)
x0_mincircle_wcs      Minimum bounding circle centroid Galactic longitude (deg)
y0_mincircle_wcs      Minimum bounding circle centroid Galactic latitude (deg)
radius_mincircle_wcs  Minimum bounding circle radius (arcmin)
minSize_wcs           Minimum size of the minimum bounding rectangle (arcmin)
maxSize_wcs           Maximum size of the minimum bounding rectangle (arcmin)
S                     Sum of source brightness (Jy/beam)
Smin                  Minimum source brightness (Jy/beam)
Smax                  Maximum source brightness (Jy/beam)
Smean                 Mean source brightness (Jy/beam)
Smedian               Median source brightness (Jy/beam)
Sstddev               Stddev of the source brightness (Jy/beam)
Sbkg                  Sum of background brightness from median estimator (Jy/beam)
Sbkg_interp           Sum of background brightness from interpolation (Jy/beam)
Sbkg_fit              Sum of background brightness from polynomial fit (Jy/beam)
Serr_bkg              Background brightness uncertainty (Jy/beam)
Serr_noise            Total source brightness uncertainty (Jy/beam)
Snoise                Sum of background rms extrapolated over source size in beams (Jy/beam)
Stot                  Background-subtracted source brightness (Jy/beam)
Stot_err              Background-subtracted source brightness uncertainty (Jy/beam)
flux                  Source flux density, background-subtracted (Jy)
fluxErr               Source flux density uncertainty (Jy)
Stot_nested           Sum of source brightness of nested point-like and compact sources (Jy/beam)
Stot_err_nested       Uncertaintyin the sum of source brighness of nested point-like and compact sources (Jy/beam)
Stot_noPS             Source brightness after subtracting nested compact sources (Jy/beam)
Stot_err_noPS         Uncertainty of source brightness after subtracting nested compact sources (Jy/beam)
flux_noPS             Source flux density after subtracting nested compact sources (Jy)
flux_err_noPS         Uncertainty in source flux density after subtracting nested compact sources (Jy)
is_flux_reliable      Flux density is likely reliable considering theoretical spatial filtering (0=NO, 1=YES)
border                Source is in the tile border (0=NO,1=YES)
classname             Source classification label
classid               Source classification id (-1=MULTICLASS, 0=UNCLASSIFIED, 1=LBV/WR, 2=GALAXY, 3=PN, 4=SNR, 6=HII)
objname               Crossmatched catalogue source(s)
--------------------------------------------------------------------------------