CO spectra superposed on the Hα filament structure around NGC 1275 (Conselice et al. 2001). The double circles show the 1.3 and 3 mm beamwidths at the regions where CO was detected. CO(1–0) and CO(2–1) spectra are shown when detected. The channel width is 42 km s^-1 and the y-axis is main beam brightness temperature, in mK. The velocity scale is from  − 560 to 560 km s^-1 in each insert. Small circles (1.3 mm beamwidth) show regions where no CO was detected. See Table 1 for more details.