Description of source "IRAS20081+3122" from Kim et al. (2019)

IRAS200813122 (ON 1) shows a bunch of maser lines from 70 to +60km s1, including blueshifted HV/EHV and redshifted HV components, in 2010 and 2011 (Figure 1). The blueshifted components are stronger than the redshifted ones. According to the H2O maser monitoring result of Felli et al. (2007) toward this object for two decades (from 1987 March to 2007 February), maser lines around the systemic velocity (11.6 km s1) were usually the strongest, and blue- and redshifted HV/EHV lines were more frequently variable.