Spectral index maps of extended MAGPIS SNR candidates. The color scale represents the spectral index α from −1.5 to 0.5, the black contours show the continuum emission in steps of 5, 10, 15, 20, 40, and 100 mJy beam^-1. The red and white circles indicate the sizes of the SNR candidates given in Helfand et al. (2006) and the sizes of the H ii regions given in Anderson et al. (2014), respectively. In each panel the synthesized beam is shown in the bottom left corner.