0235-197 appears to be dominated by the outer lobes at frequencies > 5 GHz. The most interesting feature is the bright hot spot at the far end of the Eastern lobe. At both 5 and 8.4 GHz (Figs.1 to 3), the hot spot has a double structure with individual components labelled E₁ and E₂. Component E₁ also appears double when observed with higher resolution at 15GHz (Fig.4). The images have been convolved to 0.4 arcsec resolution in order to calculate the hot spot spectral indices. Both components E₁ and E₂ show a large steepening in spectral index, $\alpha$ ( $S\propto\nu^{-\alpha}$ ), between 5-8.4GHz and 8.4-15GHz. We find values of $\alpha = 0.5$ and $\alpha = 1.4$ respectively for E₁ and $\alpha = 0.68$ and $\alpha = 2.5$ respectively for E₂. The front shock of the lobe W₁ at the opposite side is resolved in all of the images and can hardly be defined as a "hot spot''. The spectral index of the bright part at the far end is also steep ( $\alpha = 1.2$ ) in the range 5-8.4 GHz and it steepens to $\alpha\geq 2$ in the range 8.4-15 GHz (since the 15 GHz flux density estimate is an upper limit). Note that the observations at 15 GHz have lower sensitivity to diffuse, extended emission.

$\begin{figure}\resizebox{\hsize}{!}{\includegraphics{ms9441f7.eps}}\end{figure}$

Figure 7: VLA image of 1203+043 at 8.4 GHz. Contours are at -0.25, 0.25, 0.5, 1, 2, 4, 8, 16, 32, 64, 128 mJybeam^-1. The peak flux density is 14.8 mJybeam^-1

$\begin{figure}\resizebox{\hsize}{!}{\includegraphics{ms9441f8.eps}}\end{figure}$

Figure 8: VLA image of the central region of 1203+043 at 8.4 GHz. Contours are at -0.25, 0.25, 0.5, 1, 2, 4, 8, 16, 32, 64, 128 mJybeam^-1. The peak flux density is 14.8 mJybeam^-1. A vector length of 1 $\hbox {$^{\prime \prime }$ }=$ 10 mJybeam^-1

$\begin{figure}\resizebox{\hsize}{!}{\includegraphics{ms9441f9.eps}}\end{figure}$

Figure 9: VLA image of 1203+043 at 15 GHz. Contours are at -0.4, 0.4, 0.6, 1, 2, 4, 8, 16, 32 mJybeam^-1. The peak flux density is 14.5 mJybeam^-1. A vector length of 1 $\hbox {$^{\prime \prime }$ }=$ 10 mJybeam^-1

$\begin{figure}\resizebox{\hsize}{!}{\includegraphics{ms9441f10.eps}}\end{figure}$

Figure 10: VLA image of 1203+043 at 320 MHz. Contours are at -5, 5, 10, 20, 30, 50, 70, 100, 150, 200, 300, 500, 700, 800 mJybeam^-1. The peak flux density is 796 mJybeam^-1

Table 4: Polarization parameters from high resolution observations
Source z C PA RM RM $\times$ $\%$ Pol DP DP

6 cm 4 cm 2 cm (1+ z)² 6 cm 4 cm 2 cm 6-4 4-2

0235-197
0.62 E₁ 68 $\pm$ 6 77 $\pm$ 2 84 $\pm$ 1 87 228 22.0 23.6 20.2 0.93 1.2

E₂ -80 $\pm$ 7 -84 $\pm$ 2 82 $\pm$ 2 -87 -228 13.4 17.8 8.4 0.75 2.1

W₁ 78 $\pm$ 4 83 $\pm$ 2 - 35 92 22.8 19.5 - 1.20 -

1203+043
J₁ 68 $\pm$ 3 62 $\pm$ 1 66 $\pm$ 6 17 15.0 20.2 5.5 0.74 3.7

J₂ -68 $\pm$ 8 -49 $\pm$ 1 - 140 15.8 10.9 - 1.45 -

**Table 4:** Polarization parameters from high resolution observations
Source	z	C		PA		RM	RM $\times$		$\%$ Pol		DP	DP
			6 cm	4 cm	2 cm		(1+ z)²	6 cm	4 cm	2 cm	6-4	4-2
0235-197	0.62	E₁	68 $\pm$ 6	77 $\pm$ 2	84 $\pm$ 1	87	228	22.0	23.6	20.2	0.93	1.2
		E₂	-80 $\pm$ 7	-84 $\pm$ 2	82 $\pm$ 2	-87	-228	13.4	17.8	8.4	0.75	2.1
		W₁	78 $\pm$ 4	83 $\pm$ 2	-	35	92	22.8	19.5	-	1.20	-
1203+043		J₁	68 $\pm$ 3	62 $\pm$ 1	66 $\pm$ 6	17		15.0	20.2	5.5	0.74	3.7
		J₂	-68 $\pm$ 8	-49 $\pm$ 1	-	140		15.8	10.9	-	1.45	-

All of the hot spots are highly polarized, with little depolarization and Faraday rotation. The magnetic field is parallel to the front shock and rather ordered in the lobe regions with weak diffuse emission. (The electric vector is shown in all of the images shown in the paper). At 320 MHz (Fig.5), the polarized emission, if any, is below the detection limit of our observations. Polarized emission is detected over all of the source in the low resolution observations at 5 GHz (Fig.6). The magnetic field is again ordered and, generally speaking, parallel to the source major axis, apart from the hot spot area, where the magnetic field is parallel to the front shock. There are two main regions of polarized emission in the E lobe. The mean PA given in Table 5 should be treated with care because the position angles of the polarization vectors in the lobe actually vary greatly. The depolarization between 5 GHz and 320 MHz is very high (DP>0.02). Statistically, in these classical sources, the lobe nearest to the nucleus usually shows a steeper spectral index. Here we find similar values ( $\alpha=$ 0.84) for the two lobes of 0235-197. There are indications of Faraday rotation in the hot spots from the high resolution maps.

4.2 1203+043

However, the new observations have allowed us to identify component C with the core of the radio source. This component has an inverted spectrum which peaks at frequencies $\geq$ 15 GHz. 1203+043 therefore has an asymmetric structure, with a long bent jet pointing South which fades slowly and with a weak lobe of emission to the north where there is marginal evidence of an hot spot. The radio position of the core of 1203+043 does not coincide within the errors to any optical counterpart on the Palomar Sky Survey prints.

Much more interesting is the structure found at 320 MHz (Fig.10). Together with the North-South structure which dominates at higher frequencies and which appears here as a ridge of emission, there is a region of diffuse emission with its major axis perpendicular to the main ridge. This new feature is about 50 arcsec in extent and is comparable in width with the main North-South ridge.

Table 5: Polarization parameters from low resolution observations of 0235-197 at 6cm
Source C PA $\%$ Pol

0235-197
E -16 $\pm$ 18 10.5

C -85 $\pm$ 1 9.1

W -18 $\pm$ 5 20.6

4 Notes on individual sources

4.1 0235-197

4.2 1203+043