Time Stop and Assassin's Death Attack

[Telrathel]

Ok so I already checked the forums just to be sure this hasn't come up and I didn't see it anywhere. My question is, assuming you had an Assassin with his death attack and high ranks of UMD for scrolls of time stop, (I know it's crazy expensive) could you cast time stop then during the rounds in which time stop is in effect do the required studying of your target for death attack.

A few friends of mine have argued it goes against the idea of studying the target, being that when your studying them they aren't actually active, but as far as RAW goes I personally don't see any reason this doesn't work.

[Exocrat]

It should totally work. Even if they aren't moving, you can still look for likely weak points, anatomical features, analyze their stance, etc.

[Talonhawke]

One they can be sleeping for the three rounds so activity level is a moot point.

Second remember you don't know how long you time stop last so be careful there.