tlb wrote:What proof do you have that they did not detect the scout? If they had detected a scout, then it would be in hyperspace speeding back to the Grand Alliance before they could reach out to the translation point.
I don't have any hard proof.
But when they GA investigated the system, only a few ghost riders on balistic courses came close to the system (and still "stay well out of the inner system"), at 40% of light speed. No scout ship actually entered the system, they all transitioned three light weeks out of the system (assuming the sensors are as good as manticorans and could detect a transition within 2½ light weeks) and stayed at least one light week out when dropping and recovering the drones. So unless their sensors have been a log better than those of the GA, all they could possibly detect were a few Ghost Riders, balistically passing close to their system, which is very unlikely. (Source: The planning meeting with Rear Admiral Garlan Thwaites, commanding the RMNs survey command.)
And the fact that they've detected "just a few week impeller traces" when the GA flooded the system with their recon drones, together with the fact that they didn't detect the (Hermes?) platform used as relay until it started sending 200.000km close to crick, strongly suggests that they could not detect ballistic ghost riders which did not enter the inner system.
And the other hint is is that they've reacted a bit surprised by the arrival of the force. Had they actually detected the scouts, they wouldn't be surprised by the size of the footprint of the fleet. Exactly that "Whatever it is, it's not scouts" shows that they didn't expect the full fleet to arrive, so they had not detected the scouts a few weeks before.
Btw, in the meeting with Audrey O'Hanrahan, HH herself talks about the Malignment could teach the "Hydra lessons about growing secondary heads. Even if we lop this one of, there's no saying we'll have gotten every bit of the tumor". So at least some people in the GA are open to the idea that Galton may not be the last hideout of the alignment.