Flaring water masers associated with W49N
Journal
Date Issued
2019
Author(s)
Volvach, L. N.
•
Volvach, A. E.
•
Larionov, M. G.
•
MacLeod, G. C.
•
Wolak, P.
•
Kramer, B.
•
Menten, K. M.
•
Kraus, A.
•
•
•
•
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 water maser feature; it increased in over ten months to S(1.3 cm) = 84 kJy in 2017 December, then decayed to the pre-flare quiescent value of S(1.3 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.
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 water maser feature; it increased in over ten months to S(1.3 cm) = 84 kJy in 2017 December, then decayed to the pre-flare quiescent value of S(1.3 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.
Volume
628
Start page
A89
Issn Identifier
0004-6361
Ads BibCode
2019A&A...628A..89V
Rights
open.access
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