Discovery of a dozen torsionally-excited methanol maser lines during a transient flare in the massive protostar g358.93-0.03 mm1

I am happy to announce that the intermediate upgrade to further increase the bandwidth of the SMA is progressing well, with all receivers in all antennas now capable of producing an IF band covering 4 to 16 GHz. This translates to an instantaneous on-sky spectral coverage of up to 48 GHz for different receiver tunings, or 24 GHz for dual polarization with increased sensitivity. The maximum contiguous coverage with the current system is 44 GHz, which includes 4 GHz spectral overlap of the two polarizations. This setup is demonstrated in the test spectrum below, from 1 of 21 baselines, obtained towards Orion KL during science commissioning of quadrants 5 and 6 of the SWARM correlator. Science commissioning is proceeding well, and we expect to offer the increased bandwidth in the upcoming call for observing proposals for semester 2020A, which begins May 16th. Please join me in thanking the many staff members in Hilo, Cambridge, and Taipei who made this happen.