First of all, what was the action on the turn? It's been deleted from the rest of the hand history.
Secondly, any read on the table (especially the guy who opened with a raise from UTG)? Your hand is not great. Sure you have a suited A with a couple lows, but you don't have a 2 or 3 so it becomes harder to make the nut low. You're hi hand potential is limited to one flush and a straight. I know it looks like a decent hand, but that 4 isn't super and the 6 is doing you no favors. I would have passed on this one.
However, going with the play, I do like the flop raise. It helps knock out players who might stay on to catch a cheap lo to split or someone who might backdoor a flush to your trips.
***So, as I'm going through this hand something strikes me very odd. This hand doesn't add up. If you add all the money on the streets it comes to $7. The total pot before rake was $7.75. But on the turn, the street we are missing the info from, the bet size is $0.5, and you can't bet less. So, how did the hand play out? Something is missing here.