The Konus-Wind and Helicon-Coronas-F detection of the giant $\gamma$-ray flare from the soft $\gamma$-ray repeater SGR 1806-20

E. P. Mazets, T. L. Cline, R. L. Aptekar +4

The giant outburst from SGR 1806-20 was observed on 2004 December 27 by many spacecraft. This extremely rare event exhibits a striking similarity to the two giant outbursts thus fa…