BattleCruiserCommander
This was more than enough to justify the sacrifice of the whole small fleet. The acquisition of enemy technology and assets are of utmost importance, as it opens gateways to powers unimaginable. Though the frigate sports technology inferior than the kind achieved by the Deltas at this point, it is a valuable object of study.
Thus, it is transported away by the elusive FTL method of the Deltas, weirdly enough, the bubble simply encompasses the captured ship that, after being fully deactivated to prevent any sort of tracking, now is gone from the system.
And so is the fleet that acquired it, off to somewhere else after gathering energy to recharge the internal batteries that supply the lasers, continuing to explore the galaxy.