As announced in a news article on the ALMA Science Portal in 2019, the EU ARC has implemented a service which permits ALMA users to request the calibrated data for a given dataset (Member Obs Unit Set, MOUS) to be made available for download.
...
The service features are extended regularly:
Since April 2022, users can make use of the continuum subtraction performed by the pipeline (Cycles 8+):
For all Pipeline-imaged MOUSs from Cycle 8 onwards, also the Pipeline continuum-subtracted MSs will be created and provided for download in addition to the standard calibrated data. Using these additional MSs, users can immediately start to produce line cubes making use of the continuum subtraction performed by the pipeline.
General archive researchers can request the calibrated data for particular calibrator targets even if the MOUS is still in proprietary time:
If a user is interested in the data of a certain calibrator target (typically a Quasar) which is contained in an MOUS which is still in proprietary time, but the user is not part of the PI team and thus not entitled to access the science target data of the MOUS, then he/she can still request the calibrated data for the calibrator only. Just add the text "requesting only the data for calibrator <name>" to your helpdesk request where <name> is the exact name of the calibrator, e.g. "J0217-0820", as it can be determined from the Archive.
You can identify MOUSs which belong to the same Group OUS from tags which the CalMS service writes into the MS's HISTORY table.
As an alternative to the CalMS service, you can also look into the long-term data storage of the Ari-L Project (Cycles 2 - 4).See https://almascience.eso.org/tools/eu-arc-network/the-european-arc-calms-service
In July 2022 we celebrated the provided MOUS number 2001!
