Republic Death Ray

By 2P51, in Star Wars: Edge of the Empire RPG

OK starship/EU enthusiasts, what is the beam weapon destroying the separatist ship at about 1:05? Precursor Death Star beam or what? Anything written about it?

https://www.youtube.com/watch?v=ZWoGkrt5Upg

A little trivia: In the opening sequence when the second Separatist ship is destroyed, a piece of debris flies into the Clone Star destroyer that shot it. That piece of debris is a Kitchen Sink. It was it put in there by ILM as a joke from someone saying, "We're throwing everything in the sequence but the kitchen sink." - from IMDb "Star Wars: Episode III - Revenge of the Sith