X-Calibur balloon flight in Antarctica

The X-Calibur balloon is ready for flight in Antarctica now! This project is led by Prof. Henric Krawczynski at Washington Univeristy St. Louis, and RIKEN is one of the collaboration institutes. X-Calibur is the first hard-X-ray plarimetry mission with grazing mirrors, and aims to perform high sensitivity polarimetry in the hard X-ray band. See detail of the project at ((X-Calibur web page)). The status of the flight is displayed at ((Balloon Status)).