Analysis of the data for photometric calibration of the grating is underway. The sensitivities are not yet well established. However, it is clear that, compared to ground values, there has been a loss of sensitivity, probably around a factor of 2, although early estimates were somewhat higher. Work continues to optimise operating conditions and data processing to minimise these losses. The wavelength calibration has been successfully completed and flux calibration is underway.
Work is ongoing to optimise operating conditions and data processing.
It should be noted that these results represent one frozen moment in the Instrument Teams' continuously developing understanding of in-orbit performance. These figures and conclusions may still change significantly during the coming weeks.