We report the discovery of 6.035 GHz hydroxyl (OH) maser flares toward the massive star forming region IRAS 18566+0408 (G37.55+0.20), which is the only region known to show periodic formaldehyde (4.8 GHz H 2 CO) and methanol (6.7 GHz CH 3 OH) maser flares. The observations were The OH maser flares are not simultaneous with the H 2 CO flares, but may be correlated with CH 3 OH flares from a component at corresponding velocities. A possible correlated variability of OH and CH 3 OH masers in IRAS 18566+0408 is consistent with a common excitation mechanism (IR pumping) as predicted by theory.

No abstract

No abstract

No abstract

No abstract