Additional observations from 2012 and 2013 have been incorporated that include Mopra projects M624 (PI: Roman-Duval), M625 (PI: Bernard), M633 (PI: Wong), and M1022 (PI: Hughes). This expands the coverage of the LMC by approximately 20% compared to DR1.
Data cubes have been generated in the heliocentric velocity frame. In Livedata, a fix for an error in the application of the calibration factors and improved baseline estimation have been implemented, although a residual baseline still had to be subtracted. The re-baselining is now done iteratively by first generating a signal mask and then fitting a linear baseline to each spectrum, excluding the channels where signal was found. The signal mask is based on a smoothed cube so should include some "padding" around the actual emission.
A new cloud catalogue has not yet been generated. See Data Release 1 for the the cloud catalogue presented in the ApJS paper.
These are gzipped FITS images constructed using the SIN projection. Note that regions which were not observed have been assigned a blank value. The brightness temperature scale corresponds to the main beam brightness temperature assuming a 45" FWHM Gaussian beam. The pixel scale is 15" x 15" x 0.526 km/s.
Filename | Description [Units] | Download Link |
LMC_MAGMA_DR3.co.base.fits.gz | Baseline subtracted data cube [K] | download |
LMC_MAGMA_DR3.co.rms.fits.gz | Theoretical noise cube [K] | download |
LMC_MAGMA_DR3.co.snrpk.fits.gz | Peak intensity of SNR cube [sigma] | download |
The data and noise cubes have been processed using an IDL script that implements a dilated masking technique.
Images produced include the first 3 velocity moments and their estimated errors, the peak intensity within the mask, and a mask cube with values of 1 for good pixels and 0 for excluded pixels.
For the 'sgm' series the mask is derived by first smoothing the cube spatially, to reach a resolution of 67.5", and spectrally, by a convolving with a Gaussian with a FWHM of 3 channels. Then the mask was generated by expanding from the 5-sigma contour of the smoothed cube out to the 3 sigma contour. (Both initial and expanded mask are required to be at least 2 channels wide at every spatial pixel.) This mask is then applied to the original data cube before taking moments along the velocity axis.
Filename | Description [Units] | Download Link |
LMC_MAGMA_DR3.co.sgm.mom0.fits.gz | Integrated intensity [K km/s] | download |
LMC_MAGMA_DR3.co.sgm.emom0.fits.gz | Error in mom-0 [K km/s] | download |
LMC_MAGMA_DR3.co.sgm.mom1.fits.gz | Intensity-weighted mean velocity [km/s] | download |
LMC_MAGMA_DR3.co.sgm.emom1.fits.gz | Error in mom-1 [km/s] | download |
LMC_MAGMA_DR3.co.sgm.mom2.fits.gz | Velocity dispersion [km/s] | download |
LMC_MAGMA_DR3.co.sgm.emom2.fits.gz | Error in mom-2 [km/s] | download |
LMC_MAGMA_DR3.co.sgm.peak.fits.gz | Peak intensity of masked cube [K] | download |
LMC_MAGMA_DR3.co.sgm.mask.fits.gz | Binary (T/F) mask cube [none] | download |
For the 'gm' series the mask is derived without smoothing, by expanding from the 4-sigma contour of the original cube out to the 2 sigma contour. This yields a smaller mask, as can be seen from the mask cube below.
Filename | Description [Units] | Download Link |
LMC_MAGMA_DR3.co.gm.mom0.fits.gz | Integrated intensity [K km/s] | download |
LMC_MAGMA_DR3.co.gm.emom0.fits.gz | Error in mom-0 [K km/s] | download |
LMC_MAGMA_DR3.co.gm.mom1.fits.gz | Intensity-weighted mean velocity [km/s] | download |
LMC_MAGMA_DR3.co.gm.emom1.fits.gz | Error in mom-1 [km/s] | download |
LMC_MAGMA_DR3.co.gm.mom2.fits.gz | Velocity dispersion [km/s] | download |
LMC_MAGMA_DR3.co.gm.emom2.fits.gz | Error in mom-2 [km/s] | download |
LMC_MAGMA_DR3.co.gm.peak.fits.gz | Peak intensity of masked cube [K] | download |
LMC_MAGMA_DR3.co.gm.mask.fits.gz | Binary (T/F) mask cube [none] | download |