News

• September 4, 2025 The NEID pipeline team has detected a hardware issue with the laser frequency comb that is resulting in invalid wavelength solutions being computed by the pipeline for the bluest spectral orders where the LFC provides useful light. The underlying Level0 data is unaffected, and the instrument remains stable and operational. This affects the RVs derived for those orders, and also contaminates the roll-up RV derived for all orders, and those quantities should be deemed suspect until further notice. The issue can be detected by users by examining the order by order RVs that are reported in the Level 2 files, extension 12 header. Users desiring a roll-up RV can recalculate it from those values by excluding order index 40 and 41 (echelle orders 132 and 133), as described in the "Cross-Correlation based RVs" section of the documentation. The instrument team will continue to monitor this situation as the LFC evolves and update this recommendation as needed. We are working to implement a pipeline algorithm update that will be robust to these changes in the future.
• July 1, 2025 The current version of the NEID pipeline is v1.4.2 (see NEID DRP docs and changelog) and reprocessing is complete.
• December 10, 2024 The Advanced Search page has been updated to allow selection of multiple processing versions of lev1 and lev2 data. In the pipeline version pulldown, select the versions you are interested in - multiple rows will be returned for the same lev0 data that has multiple pipeline reductions available. PyNEID and TAP users can access the metadata for the all versions of the reduced data by using adql queries to select from the neidl1_all and neidl2_all tables. The flagged column has been updated to show 0 (pass quality check) or 1 (fail quality check). The rejected column has been updated to show 0 (okay signal-to-noise) or 1 (low signal-to-noise.)
• Use the Advanced Search page if you wish to access rejected files.