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Detection of a Second Bright H2O Maser Burst from G25.65+1.05 at the Simeiz RT-22 and HartRAO Radio Telescopes

ATel #10853; Alexandr E. Volvach and Larisa N. Volvach (Crimean Astrophysical Observatory), Gordon MacLeod (Hartebeesthoek Radio Astronomy Observatory), Olga Bayandina, Nadezhda Shakhvorostova and Irina Val'tts (Astro Space Center, Lebedev Physical Institute)
on 16 Oct 2017; 09:55 UT
Credential Certification: Alexandr Volvach (volvach@meta.ua)

Subjects: Radio, Variables, Young Stellar Object

The source of maser emission in 22.235-GHz H2O line in the star-forming region G25.65+1.05 has experienced a second flare (Volvach and Volvach, et al. 2017, ATel #10728; Koichiro Sugiyama, Yu Saito, et al. 2017, ATel #10757; Sobolev, Bisyarina, Tatarnikov, Antokhin, Volvach, , ATel #10788). The peak flux density of the main feature at VLSR = 42.5 km/s were: 2017 October 10 - ~20000 Jy (Simeiz); 2017 October 11 - ~25000 Jy (Simeiz, HartRAO). Follow-up observations of this source are highly desirable.