Powerful flare phenomena in water vapor maser lines in the emerging
  protostellar system with protoplanetary disks IRAS 16293-2422
  Based on the long-term monitoring data of the water maser since 2019.0 to
2021.0 allowed us detecting in IRAS 16293-2422 two powerful phenomena lasted
about year at radial velocities near 6 and 8 km s$^{-1}$. In both cases,
powerful short flares were located on the tops of less powerful, but more
prolonged ones (2.5 and 0.5 kJy), radiation of which initiated the emission of
more powerful flares. For the first time, configurations of several emitting
maser spots located at the line of sight to the observer were discovered
experimentally. This made it possible to confirm the hypothesis of activation
of the water maser, based on an increase in the amplification length of the
maser due to several maser condensations located at the line of sight to the
observer. The unsaturated state of the most powerful and shortest maser flares,
as well as the saturated state of the weak, has been established. New important
parameters of the water maser and the assumed location of the maser spots have
been obtained.
