This was what I got from actually watching them play so it's pretty accurate.
Julia plays this in the intro, standard tuning...

/ = slide

---------------------------|
-4/7-4-7-------4/7-4-7-----|
---------3-4-----------6-4-|
---------------------------|
---------------------------|
---------------------------|
Second time through....

-------------------------------|
-4/7-4-7-------4/7-4-7---------|
---------3-4-----------6-4-3-4-|
-------------------------------|
-------------------------------|
-------------------------------|

Angus plays:
(Capo 1st fret)
C - Am - Em - Em
He plays that throughout most of the song. Figure out his strumming pattern by listening 
it. Hope it has helped.