Fig. 12
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Flux distribution of masers as reported in the GLOSTAR, the MMB (Green et al. 2009) and the Yang et al. (2019b) catalogues. The vertical dashed red line corresponds to the average 4σ noise level for the GLOSTAR methanol D-configuration data (~70 mJy beam−1). The sources of the other surveys that were not detected in the GLOSTAR survey are well below the sensitivity level of our unbiased search.
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