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Last modified: 1 November 2024

URL: https://cxc.cfa.harvard.edu/ciao/why/hrc_degap.html
/ ciao / why / hrc_degap.html

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.

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/ ciao / why / hrc_degap.html