Top left: GMRT 325 MHz map. Contour levels are drawn as in Fig. 1. Top right: VLA 1425 MHz map. Contour levels are drawn as in Fig. 1. Bottom left: VLA 1425 MHz polarization map. Total polarized intensity is shown as grayscale image. Vectors refer to the polarization E-vectors, with their length representing the polarization fraction. A reference vector for a polarization fraction of 100% is shown in the bottom left corner. The polarization fractions were corrected for Ricean bias (Wardle & Kronberg 1974). No polarization E-vectors were drawn for pixels with a SNR less than 3 in the total polarized intensity map. Contours show the total intensity image (Stokes I) at 1425 MHz. Contour levels are drawn at  [ 1,16,256,4096,... ] × 0.147 mJy beam^-1. Bottom right: optical POSS-II color image for VLSS J0004.9 − 3457. GMRT 610 MHz contours are overlaid in yellow. The beam size is 6.4″ × 4.3″. Contour levels are drawn as in Fig. 5.