3-- AKs w/ 9BB All-In PF vs Big Stack Raiser, Right?

[TomBrooks]

PokerStars $3 NLHE Tourney, Big Blind is t100 (9 handed)

Hadn't seen UTG doing much or show down anything. Button had doubled up early with a flopped set of 8s that turned a boat against a nut flush and he pushed it last to act. Button was playing a fair amount of hands 43/18 but thats the only one that showed down. 16hands in, I'd only entered the pot twice so far and folded the flop both times. I won one showdown from the BB w/ the lowest possible 1 card flush that came in on the river and that I c/c a min bet and a min c/r with.

This is a push All-In, right? I only have 9BB as the blinds are already 50/100.

UTG (t1255)
UTG+1 (t1525)
MP1 (t2095)
MP2 (t1395)
MP3 (t1865)
CO (t1515)
Button (t3165)
Hero (t1405)
BB (t780)

Preflop: Hero is SB with A[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/club.gif[/img].
UTG calls t100, <font color="#666666">5 folds</font>, <font color="#CC3333">Button raises to t400</font>, <font color="#CC3333">Hero raises to t1405</font>