In-orbit Crab observations show that Resolve's energy resolution at 6 keV degrades with high count rates in neighboring pixels and that a nearest-neighbor coincidence cut restores it, while energy-scale offsets of about 1 eV between bright and faint pixels can masquerade as Doppler shifts.
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High count rate effects in event processing for XRISM/Resolve x-ray microcalorimeter: II. Energy scale and resolution in orbit
In-orbit Crab observations show that Resolve's energy resolution at 6 keV degrades with high count rates in neighboring pixels and that a nearest-neighbor coincidence cut restores it, while energy-scale offsets of about 1 eV between bright and faint pixels can masquerade as Doppler shifts.