ATs 5bb facing MP raise

[rebuyboy]

push or fold

PokerStars Game #10658531378: Tournament #53998341, $6.00+$0.50 Hold'em No Limit - Level VIII (200/400) - 2007/06/28 - 02:39:11 (ET)
Table '53998341 1' 9-max Seat #1 is the button
Seat 1: chiptricks69 (5485 in chips)
Seat 2: lilleal88 (6860 in chips)
Seat 3: Papyno (7915 in chips)
Seat 4: rustykings (3015 in chips)
Seat 6: sorry4you (1110 in chips)
Seat 7: triweasel (3470 in chips)
Seat 8: creative cos (3590 in chips)
Seat 9: hero (1940 in chips)
chiptricks69: posts the ante 25
lilleal88: posts the ante 25
Papyno: posts the ante 25
rustykings: posts the ante 25
sorry4you: posts the ante 25
triweasel: posts the ante 25
creative cos: posts the ante 25
hero: posts the ante 25
lilleal88: posts small blind 200
Papyno: posts big blind 400
*** HOLE CARDS ***
Dealt to hero [Ac Tc]
rustykings: folds
sorry4you: folds
triweasel: raises 800 to 1200
creative cos: folds
hero:

no reads other than i saw him limp KK on button earlier