The Mopra Southern Galactic Plane CO Survey : data release 3

We present observations of 50 deg2 of the Mopra carbon monoxide (CO) survey of the Southern Galactic Plane, covering Galactic longitudes l = 300-350° and latitudes |b|≤ 0.5°. These data have been taken at 0.6 arcmin spatial resolution and 0.1 km s-1spectral resolution, providing an unprecedented view of the molecular clouds and gas of the Southern Galactic Plane in the 109-115 GHz J = 1-0 transitions of 12CO, 13CO, C18O, and C17O.We present a series of velocity-integrated maps, spectra, and position-velocity plots that illustrate Galactic arm structures and trace masses on the order of ∼106 Mʘ deg-2, and include a preliminary catalogue of C18O clumps located between l = 330-340°. Together with the information about the noise statistics of the survey, these data can be retrieved from the Mopra CO website and the PASA data store