Spectral indices Australia 6 Compact arrays 6 High resolution 6 Optical telescopes 6 Radio observation 6 Stars 6 Archival data 4 Associated gas 4 Atmospheric optics 4 Emission lines 4 Flux densities 4 Gamma ray sources 4 Gamma rays 4 Gamma-ray emission 4 Giant metrewave radio telescopes 4 ISM: individual objects 4 ISM: individual objects: G338.3-0.0 4 ISM: individual objects: HESS J1640-465 4 ISM: supernova remnants 4 Ionization of gases 4 Ionized gas 4 Molecular gas 4 Molecular materials 4 Multi frequency 4 Optical depth 4 Pulsar wind nebula 4 Radio continuum: ISM 4 Radio flux 4 Radio frequencies 4