2008AJ....135..167L

New H I images from the VLA Galactic Plane Survey show prominent absorption features associated with the supernovae remnant G23.3-0.3 (SNR W41). We highlight the H Iabsorption spectra and the ¹³CO emission spectra of eight small regions on the face of W41, including four H IIregions, three non-thermal emission regions, and one unclassified region. The maximum velocity of absorption for W41 is 78±2 km.s^–1 and the CO cloud at radial velocity 95±5 km.s^–1 is behind W41. Because an extended TeV source, a diffuse X-ray enhancement, and a large molecular cloud at radial velocity 77±5 km.s^–1 overlap the center of W41, the kinematic distance is 3.9-4.5 kpc for W41. For the H IIregions, our analysis shows that both G23.42-0.21 and G23.07+0.25 are at the far kinematic distances (∼9.9 kpc and ∼10.6 kpc, respectively) of their recombination-line velocities (103±0.5 km.s^–1 and 89.6±2.1 km.s^–1, respectively), G23.07-0.37 is at the near kinematic distance (4.4±0.3 kpc) of its recombination-line velocity (82.7±2.0 km.s^–1), and G23.27-0.27 is probably at the near kinematic distance (4.1±0.3 kpc) of its recombination-line velocity (76.1±0.6 km.s^–1).