%0 Journal Article
%T Flaring water masers associated with W49N
%A A. E. Volvach
%A A. Kraus
%A A. Zanichelli
%A B. Kramer
%A G. C. MacLeod
%A J. Brand
%A K. M. Menten
%A L. N. Volvach
%A M. G. Larionov
%A P. Wolak
%A S. Poppi
%A S. Righini
%J -
%D 2019
%R 10.1051/0004-6361/201935521
%X <i>Aims.<i/> We present our monitoring observations and analysis of water masers associated with W49N taken in 2017 and 2018. A significant flare occurred during these observations.<i>Methods.<i/> We used ground-based radio telescopes in Simeiz (RT-22), Torun (RT-32), Medicina (RT-32), Effelsberg (RT-100) with broadband spectrometers. Observational data were collected and processed automatically.<i>Results.<i/> We report a powerful flare of the <i>v<i/> = +6 km s<sup>£¿1<sup/> water maser feature; it increased in over ten months to <i>S<i/><sub>1.3 cm<sub/> = 84 kJy in 2017 December, then decayed to the pre-flare quiescent value of <i>S<i/><sub>1.3 cm<sub/> = 8.7 kJy in 2018 August. We infer that this flaring feature is unsaturated based on the relationship between line width and flux density
%U https://www.aanda.org/articles/aa/full_html/2019/08/aa35521-19/aa35521-19.html