HARPS-N Data Reduction Update - Decommissioning of DRS32

Fig. 1 HARPS-N data reduction refurbishment.

As of 27^th of October 2025, the original HARPS-N Data Reduction System (DRS32), in use since 2012, has been officially decommissioned. This implies that the legacy DRS32 reduction code will not be run anymore on the TNG servers.

A new pipeline, originally developed for ESPRESSO, has been adapted and configured to be run at the TNG. This new software completely substitutes the old DRS32 reduction system.

HARPS-N observations are now processed exclusively with the new ESPRESSO-based DRS, which ensures a more uniform, stable, and up-to-date reduction improving overall consistency and long-term reliability across the instrument's full dataset.

The whole HARPS-N dataset (2012-now) has been reprocessed with the new pipeline.

For any questions or support requests, please contact the HARPS-N support team.