Daily Hand Quiz

Game type: No limit rebuy tournament
Your image: You are new to your table
Stage of tourney: Rebuy period closed, about half the field remains
Avg stack: 20k
Misc notes:
Your hand: A♠8♥
The setup: The short stack does what the short stack should do: open pushes when a couple people fold. A player with an above average stack calls, two more players fold, and the action is to you in the SB. The BB is still to act behind you. What do you do with this hand?

As a side question, how much would your answer change if you held A♠T♠ instead?