There has recently been a concentrated effort to better characterise the extinction corrections in the different SCUBA filters and update the previous work on the relationships between these and and the CSO Tau value.

This work involves a new interpretation of CSO Tau data, and a re-analysis of the parameters used in our skydip model. We have also determined the criteria for which a skydip can be deemed trustworthy.

Through this process, the overall calibration of SCUBA has been refined, and the reasons for the typically poor 450 micron skydip fits better understood. This has implications for existing datasets, depending on how they were calibrated, although any error is likely to be minimal unless 450 micron skydips were used.

The full report can be accessed here. It includes revised CSO Tau relations, recommended data reduction techniques, and guidelines for determining how badly existing datasets have been affected.