This ticket aims to regenerate HSC sky frames with the amp offset correction task turned on.
HSC data are known to exhibit small (~few ADU) amp-to-amp offsets which persist post-ISR correction. The origin of this offset is believed to be a feature of the hardware, requiring an empirical correction (ampOffsetTask) after the fact. This task was implemented in
HSC data undergo a full-focal-plane sky correction prior to coadd-level data processing, producing superior sky solutions on larger scales. This task was initially implemented in
DM-9147, and converted to gen3 in DM-22534 (cpSkyTask). Following DM-33629, HSC sky frames were updated using the latest cpPipe implementation, however, amp-offset corrections were left switched off to allow for a direct comparison with the older data processing outputs.
To that end, the calibration sky frames currently in use do not have amp offset corrections applied, therefore requiring regeneration on this ticket. Once tested as part of an RC2 run, these new amp-offset corrected sky frames should replace those currently in use for standard HSC data processing.