Fig. 2
Left: spectral index map between 325 and 610 MHz at a resolution of 11.75″ × 7.65″. Contour levels are from the 325 MHz GMRT image and drawn at levels of [1,2,4,8,...] × 6σrms. Right: spectral index between 610 and 1425 MHz. Contour levels are from the 1425 MHz VLA image and drawn at levels of [1,2,4,8,...] × 5σrms. The beam size is 6.7″ × 6.7″.
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