From Lexicanum

Map	Basic Data		Planetary Image
	Name:	Vigil
	Segmentum:	Segmentum Obscurus
	Sector:	Calixis Sector
	Subsector:	Drusus Marches
	System:	Unknown
	Population:	Unknown
	Affiliation:	Imperium
	Class:	Dead World
	Tithe Grade:	Aptus Non

Vigil is a Dead World in the Calixis Sector. The local xenos population was destroyed 5,000 years ago but the planet is still covered in extensive ruins.¹ Closer to current affairs, the Storm Wardens fought the Xeno Slaugth here during The Cleansing of Vigil. Though the Storm Wardens took heavy casualties the Slaugth were eliminated from Vigil².

Because the local xenos population was destroyed during M36 it can be presumed the Slaugth are not native to the planet.

Sources

• ¹Fantasy Flight Games The Calixis Sector
• ²Fantasy Flight Games Chapters of the Deathwatch, Part 6