GMRT image of HD 209458 field at 150 MHz. The green ellipse in the lower left corner of each image shows the half-power beamwidth (33″ × 16″at a position angle of 88°). The blue cross indicates the center of field toward HD 209458. In the left panel the contour levels are at 4.0, 5.7, and 8.0 times the image rms of 1100 μJy per beam^-1. In the right panel the contour levels are at 3.0, 4.2, and 6.0 times the center field rms of 990 μJy per beam^-1. Negative contours appear as dashed lines.