Source page for 3C20

Field	Value	Units	Converted field	Value	Units
Source name	3C20
Redshift	0.174
Source class	N
178-MHz flux	46.8	Jy	178-MHz luminosity	2.97 × 1026	W/Hz/sr
Alpha	0.66
High-resolution map frequency	8.41	GHz
High-resolution map resolution	0.220	arcsec	High-resolution map spatial resolution	0.650	kpc
High-resolution map dynamic range	2080
Low-resolution map frequency	8.41	GHz
Low-resolution map resolution	1.10	arcsec	Low-resolution map spatial resolution	3.25	kpc
Low-resolution map dynamic range	4350
Beams across source (high resolution)	214
Beams across source (low resolution)	42.8
Total map flux	2.290	Jy	Total map luminosity	1.456 × 1025	W/Hz/sr
Total map flux error	0.069	Jy	Total map luminosity error	4.4 × 1023	W/Hz/sr
Core flux	0.0033	Jy	Core luminosity	2.2 × 1022	W/Hz/sr
Core flux error	0.0006	Jy	Core luminosity error	4 × 1021	W/Hz/sr
Core prominence	0.000074
Core prominence error	0.00001
Total source size (hotspot distances)	46.14	arcsec	Total source size (hotspot distances)	136.3	kpc
Total source size (sum of linear lobe lengths)	47.11	arcsec	Total source size (sum of linear lobe lengths)	139.1	kpc
Total source size (sum of largest linear lobe sizes)	50.99	arcsec	Total source size (sum of largest linear lobe sizes)	150.6	kpc
Source recession coeff. (zeta)	0.9794
Recession asymmetry (delta)	1.026
N lobe axial ratio	1.871
S lobe axial ratio	2.520
Average axial ratio	2.195
Axial ratio asymmetry (longer lobe)	1.347
Axial ratio asymmetry (jet side)	0.7426
Fractional separation difference (x_lobe)	0.03275
Fractional separation difference (x_jet)	-0.03275
N lobe core-hotspot distance	23.41	arcsec	N lobe core-hotspot distance	69.14	kpc
N lobe angular length	25.91	arcsec	N lobe length	71.50	kpc
N lobe length resolution correction	1.70	arcsec	N lobe length resolution correction	5.02	kpc
N lobe largest angular size	26.36	arcsec	N lobe LLS	72.83	kpc
N lobe largest angular size r.c.	1.70	arcsec	N lobe LLS r.c.	5.02	kpc
N lobe angular width	13.18	arcsec	N lobe width	38.92	kpc
N lobe max angular width	30.91	arcsec	N lobe max width	91.29	kpc
N lobe flux	1.23	Jy	N lobe luminosity	7.82 × 1024	W/Hz/sr
N lobe flux error	0.037	Jy	N lobe luminosity error	2.4 × 1023	W/Hz/sr
N lobe fractional length	1.00
N lobe fractional max width position	0.09
N lobe depolarization	0.5
S lobe core-hotspot distance	22.73	arcsec	S lobe core-hotspot distance	67.13	kpc
S lobe angular length	24.55	arcsec	S lobe length	67.63	kpc
S lobe length resolution correction	1.65	arcsec	S lobe length resolution correction	4.87	kpc
S lobe largest angular size	28.18	arcsec	S lobe LLS	77.76	kpc
S lobe largest angular size r.c.	1.85	arcsec	S lobe LLS r.c.	5.46	kps
S lobe angular width	10.45	arcsec	S lobe width	30.86	kpc
S lobe max angular width	27.73	arcsec	S lobe max width	81.89	kpc
S lobe flux	1.06	Jy	S lobe luminosity	6.74 × 1024	W/Hz/sr
S lobe flux error	0.032	Jy	S lobe luminosity error	2.0 × 1023	W/Hz/sr
S lobe fractional length	1.00
S lobe fractional max width position	0.11
S lobe depolarization	0.67
Straight jet side	N
Straight jet status	Definite
Straight jet flux	0.007	Jy	Straight jet luminosity	4 × 1022	W/Hz/sr
Straight jet flux error	0.005	Jy	Straight jet luminosity error	3 × 1022	W/Hz/sr
Straight jet angular length	12.40	arcsec	Straight jet length	36.62	kpc
Straight jet angular position	4.40	arcsec	Straight jet position	13.0	kpc
Straight counterjet status	Undetected
Straight counterjet flux	<0.0090	Jy	Straight counterjet luminosity	<5.6 × 1022	W/Hz/sr
Straight counterjet flux error	--	Jy	Straight counterjet luminosity error	--	W/Hz/sr
Straight counterjet angular length	--	arcsec	Straight counterjet length	--	kpc
Straight counterjet angular position	--	arcsec	Straight counterjet position	--	kpc
Straight jet prominence	0.0001
Straight jet prominence error	0.0001
Straight counter jet prominence	0.00019
Straight counter jet prominence error	--
Total jet side	N
Total jet status	Definite
Total jet flux	0.023	Jy	Total jet luminosity	1.4 × 1023	W/Hz/sr
Total jet flux error	0.006	Jy	Total jet luminosity error	4 × 1022	W/Hz/sr
Total jet angular length	18.30	arcsec	Total jet length	54.04	kpc
Total jet angular position	4.40	arcsec	Total jet position	13.0	kpc
Total counterjet status	Possible
Total counterjet flux	0.0037	Jy	Total counterjet luminosity	2.3 × 1022	W/Hz/sr
Total counterjet flux error	0.0009	Jy	Total counterjet luminosity error	6 × 1021	W/Hz/sr
Total counterjet angular length	6.80	arcsec	Total counterjet length	20.1	kpc
Total counterjet angular position	4.50	arcsec	Total counterjet position	13.3	kpc
Total jet prominence	0.00048
Total jet prominence error	0.0001
Total counterjet prominence	0.000077
Total counterjet prominence error	0.00002
Fractional jet length	0.7421
Fractional jet position	0.178
Fractional jet termination	0.921
N hotspot status	Yes
N hotspot number	1
N hotspot flux density	0.16	Jy	N hotspot luminosity	9.9 × 1023	W/Hz/sr
N hotspot flux error	0.01	Jy	N hotspot luminosity error	6 × 1022	W/Hz/sr
N hotspot major axis	0.21	arcsec	N hotspot major axis	0.62	kpc
N hotspot minor axis	0.16	arcsec	N hotspot minor axis	0.47	kpc
N hotspot average size	0.18	arcsec	N hotspot average size	0.55	kpc
N lobe hotspot prominence	0.0033
S hotspot status	Yes
S hotspot number	1
S hotspot flux density	0.089	Jy	S hotspot luminosity	5.5 × 1023	W/Hz/sr
S hotspot flux error	0.002	Jy	S hotspot luminosity error	1 × 1022	W/Hz/sr
S hotspot major axis	0.22	arcsec	S hotspot major axis	0.65	kpc
S hotspot minor axis	0.18	arcsec	S hotspot minor axis	0.53	kpc
S hotspot average size	0.20	arcsec	S hotspot average size	0.59	kpc
S lobe hotspot prominence	0.0019
Average hotspot size	0.19	arcsec	Average hotspot size	0.57	kpc
N lobe primary fractional hotspot size	0.0075
S lobe primary fractional hotspot size	0.0076
N lobe hotspot recession coeff. (eta)	0.9670
S lobe hotspot recession coeff. (eta)	0.9926
Primary hotspot size asymmetry	0.92
Primary hotspot prominence asymmetry	1.8

More information:

• This source's record in the 3CRR database
• On-line maps are available for this source
• See the image of this source in the 3CRR Atlas.