HRC Degap

The algorithm used to determine the centroid of the charge cloud exiting the rear microchannel plate of the HRC (and hence the x-ray event position) introduces systematic errors in the event positions, which are manifested by regularly-spaced gaps in both x and y in HRC images. The degap correction is applied to compensate for this problem in the level=1 event file of HRC-I and HRC-S data when running hrc_process_events.

For more information:

• "HRC-S Degap Corrections" calibration page: technical details on the degap correction.