A flare of 6.668 GHz methanol maser in G23.389+0.185

ATel #16303; Yoshihiro Tanabe (Ibaraki University) and Yoshinori Yonekura (Ibaraki University)
on 23 Oct 2023; 03:01 UT
Credential Certification: Yoshinori Yonekura (yoshinori.yonekura@gmail.com)

Tweet

We have detected a flux rise in the 6.668 GHz Class II methanol maser toward G23.389+0.185 (R.A. = 18h33m13.1s, Dec. = -08d23’56.0” [J2000]) using Hitachi 32-m radio telescope operated by Ibaraki University. The flux density before MJD = 60181 (25/Aug./2023) for the velocity components of VLSR = 74.7 and 75.3 km/s are ~20, and ~30 Jy, respectively. The flux density increased to ~100 Jy for VLSR = 74.7 km/s component and ~120 Jy for VLSR = 75.3 km/s component at MJD = 60236 (19/Oct./2023). Figures of comparisons among spectra observed in each date and flux variations for each spectral feature can be seen at the iMet (Ibaraki 6.7 GHz class II methanol maser database) website on

Ibaraki 6.7 GHz class II methanol maser database (iMet)