LABOCA 345GHz observations of Sgr A*

The submm data set consists of 345GHz data obtained from different Large Apex Bolometer Camera (LABOCA) campaigns between 2008 and 2014, and additional literature data from 2004 to 2009 at comparable wavelengths. The radio observations were carried out with the Australia Telescope Compact Array (ATCA) between 2010 and 2014.

We used a combined maximum likelihood estimator (MLE) and Kolmogorov-Smirnov (KS) statistics method to test for a possible power-law distribution in the high flux density excursions (flares) at both wavebands. We find that both flux density distributions can be described by a shifted power-law of the form p(x){prop.to}(x-S)^-{alpha}^ with {alpha}~4 (submm: {alpha}=4.0+/-1.7, radio: {alpha}=4.7+/-0.8). The same power-law index was previously found for the near-infrared (NIR) flux density distribution.