if a character with a familiar is put to sleep (with the slumber hex, for example), could that familiar use their empathic link as a standard action to wake their master up from a distance?
Empathic Link (Su): "The master has an empathic link with his familiar to a 1 mile distance. The master can communicate empathically with the familiar, but cannot see through its eyes. Because of the link's limited nature, only general emotions can be shared. The master has the same connection to an item or place that his familiar does."
I think that while the sleeper could sense the familiars general emotion (probably alarm, or distress), that wouldn't be sufficient to awaken someone from magical sleep.