12CO spectra (solid black line) of the three sources obtained from a region with the size of the beam centered at the position of the integrated flux peak (velocity in LSR). The (green) arrows indicate the optical redshift from the literature (see Table 1). The parameters of the fitted Gaussian profile (solid red line) are given in Tables 4 and 5. In addition, the 13CO spectra of HE 0433-1028 and HE 1108-2813 from a beam-sized region at the position of the integrated 13CO flux peak and a HCO+ spectrum (nondetection) of HE 1029-1831 at the position of the integrated 12CO flux peak are shown (gray dashed line).
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