The SARAO MeerKAT Galactic Plane Survey extended source catalogue

Open Access

Table B.1

Format of the SMGPS extended source catalogue (64 data columns per source).

Col. Num.	Name	Unit	Description
1	tile_name	-	Tile image name
2	sname	-	Source name
3	sname_iau	-	Source name in IAU format
4	npix	-	Number of pixels in island
5	nnested	-	Number of child (nested) sources
6	Nnested_ext	-	Number of extended nested sources
7	nested_ext	-	Source name of the extended nested sources
8	morph_type	-	Morphology tag {`0=EXTENDED`, `1=DIFFUSE`}
9-10	(bbox_x, bbox_y)	-	Source bounding box centre in pixels
11-12	(bbox_w, bbox_h)	-	Source bounding box width and height in pixels
13-14	(bbox_rot_x, bbox_rot_y)	-,-	Source rotated bounding box centre in pixels
15-16	(bbox_rot_w, bbox_rot_h)	-,-	Source rotated bounding box width, height in pixels and rotation angle
17	bbox_theta	deg	Source rotated bounding box angle
18-19	(x,y)	-	Source centroid position in pixels
20-21	(l, b)	deg,deg	Source centroid position in Galactic coordinates
22-23	(α,δ)	deg,deg	Source centroid position in J2000 Equatorial coordinates
24-25	(x_w,y_w)	-	Source flux-weighted centroid position in pixels
26-27	(l_w,b_w)	deg,deg	Source flux-weighted centroid position in Galactic coordinates
28	radius	-	Half the diagonal in pixels of the source bounding box
29	radius_wcs	arcmin	Half the diagonal of the source bounding box
30-31	(x_minCircle,y_minCircle)	-	Minimum circle centroid position in pixels
32	radius_minCircle	-	Radius in pixels of source minimum bounding circle
33-34	(x_minCircle_wcs, y _minCircle_wcs)	deg,deg	Minimum circle centroid position in Galactic coordinates
35	radius_minCircle_wcs	arcmin	Radius of source minimum bounding circle
36-37	(minSize_wcs,maxSize_wcs)	arcmin	Source angular minimum and maximum size obtained from minimum bounding rectangle
38	S	Jy/beam	Sum of source pixel brightness
39-40	(S_min,S_max)	Jy/beam	Minimum and maximum pixel brightness in source
41-43	(S_mean,S_median, S_rms)	Jy/beam	Mean, median and standard deviation of source pixel brightness
44-46	$(S_{b k ɡ}, S_{b k ɡ}^{i n t e r p}, S_{b k ɡ}^{f i t})$ $\left( {{S_{bkg}},S_{bkg}^{interp},S_{bkg}^{fit}} \right)$	Jy/beam	Sum of background brightness extrapolated over source pixels from median, interpolation, and polynomial fit methods
47	$S_{e r r}^{b k ɡ}$ $S_{err}^{bk}$	Jy/beam	Estimated uncertainty on S _bk_g
48	$S_{e r r}^{n o i s e}$ $S_{err}^{noise}$	Jy/beam	Estimated uncertainty on S
49	S_noise	Jy/beam	Sum of background noise rms extrapolated over number of beams in source
50-51	(S_tot, S_tot,err)	Jy/beam	Sum of source pixel brightness with background subtracted and its uncertainty
52-53	(F, F_err)	Jy	Source measured flux density (with background subtracted) and its statistical uncertainty
54-55	$(S_{t o t}^{n e s t e d}, S_{t o t, e r r}^{n e s t e d})$ $\left( {S_{tot}^{nested},S_{tot,err}^{nested}} \right)$	Jy/beam	Sum of pixel brightness of point-like/compact sources (with background subtracted) found inside this source and its uncertainty
56-57	$(S_{t o t}^{n o P S}, S_{t o t, e r r}^{n o P S})$ $\left( {S_{tot}^{noPS},S_{tot{\rm{,}}err}^{noPS}} \right)$	Jy/beam	Sum of source pixel brightness (with background and nested compact sources subtracted) and its uncertainty
58-59	$(F^{n o P S}, F_{e r r}^{n o P S})$ $\left( {{F^{noPS}},F_{err}^{noPS}} \right)$	Jy	Source measured flux density (with background and nested compact sources subtracted) and its statistical uncertainty
60	is_flux_reliable	-	Flux density is likely reliable considering theoretical spatial filtering {`0=NO`, `1=YES`}
61	border	-	Source is in the tile border {`0=NO`, `1=YES`}
62	classname	-	Source classification label in string format
63	classid	-	Source classification id{`−1=MULTICLASS`, `0=UNCLASSIFIED`, `1=LBV/WR`, `2=GALAXY`, `3=PN`, `4=SNR`, `6=HII`}
64	objname	-	Matched catalogue object name(s)

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