Mopra Southern Galactic Plane CO Survey - Data Release 3

We present observations of fifty square degrees 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 arcminute spatial resolution and 0.1 km/s spectral 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. Available here is the full data release with each file containing a 1 square degree field of the plane centred at the longitude listed in the filename (e.g. G321.5-12CO_Vcrop.tar.gz covers l=321 to 322°). Each isotopologue is available separately, and for ease of downloading two velocity ranges are available. The 'Vcrop' velocity range covers from -150 ≤ VLSR ≤ +50 km/s in all isotopologues, which is the range in which emission is detected above a 2σ level; while the larger 'Vfull' cubes cover a velocity range of -1000 ≤ VLSR ≤ +1000 km/s in 12CO, and smaller ranges for the other lines (the Vfull range is also smaller between l=323-332°; see the paper for more information). Each data cube is packaged with a FITS map of the Mopra system temperature, the beam coverage and sigma RMS noise statistics to assist in interpretation of these data. Please note that the survey data presented here are in units of T*A K and have not been corrected for the Mopra extended beam efficiency, ηXB = 0.55 (see our paper for further information).