Author:
Volvach L. N.,Volvach A. E.,Larionov M. G.,MacLeod G. C.,Wolak P.,Kramer B.,Menten K. M.,Kraus A.,Brand J.,Zanichelli A.,Poppi S.,Righini S.
Abstract
Aims. 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.
Methods. 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.
Results. We report a powerful flare of the v = +6 km s−1 water maser feature; it increased in over ten months to S1.3 cm = 84 kJy in 2017 December, then decayed to the pre-flare quiescent value of S1.3 cm = 8.7 kJy in 2018 August. We infer that this flaring feature is unsaturated based on the relationship between line width and flux density.
Subject
Space and Planetary Science,Astronomy and Astrophysics
Cited by
9 articles.
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