Ice Station 31

Space Marines, 
Ice Station 31 is a research sub station of Watch Station Thule specializing in the research and understanding of the planet Antarc, the coldest known held world in the galaxy. The research undergone has contributed heavily to hazardous weather protocols across the Imperium. 
Watch Station Thule has gone dark, and communication with Station 31 have been troubled. 
A full intervention into the Thule Station is necessary. 
The Kill-Team shall be composed of recently recruited Battle Brothers, who shall(Under authorized documentation) be "Recruited" into the ranks of the Thule Station through Sub-Station 31. 
Your mission is to investigate the situation within the Thule station and ensure the sanity and loyalty of both Stations. 

Requisition: 0 
Rank limit: 2
Renown limit:30

What is the nature of this planet, Brother? Is it known what is the source of this extreme temperature? I have heard of rouge planets without a star, or planets that have come to orbit a lightless, collapsed star. But to be exceptional among these others there must be some sort of sinister meddling to be discovered here. Any word on the stations research and findings?

The stations research is dedicated to this very information, Brother Anox. 
As such, the information is a jealously guarded secret, handled only by this Watch Station and high ranking Inquisitors. 
Should you encounter any such information on the unnatural temperature when you investigate Watch Station Thule, consider it a Secondary Objective to secure it for the furthering of our own understanding; Should anything..questionable turn up, we may be returning to this world for an entirely different mission...