Screaming Bolt: Duration of Shaken?

[Stynkk]

This bolt is mighty cool:

Aura faint enchantment; CL 5th Slot none; Price 267 gp; Weight 1/10 lb.

These +2 bolts scream when fired, forcing all enemies of the wielder within 20 feet of the path of the bolt to succeed on a DC 14 Will save or become Shaken. This is a mind-affecting fear effect.

How long would the shaken effect last? Is it treated as a CL 5 Doom spell (5 minutes?)

[Carbon D. Metric]

I would say so.

[Stynkk]

Carbon D. Metric wrote:

I would say so.

*shameless* Veeeery Interesting... */shameless*

I'd pony up the 267 gp.

[Vorgen Lok-ri]

Forever. It's not like your enemies are going to live, are they?

[Malag]

I wondered this myself. Best conclusion was duration of doom spell which is 5 minutes.