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A complete guide to using Data Central
June 1, 2022 by B. Miszalski
June 14, 2022, 2:52 a.m. B. Miszalski

Pipeline As a Web Service (PAWS)

On demand data reduction from the AAT archive

2dFdr PAWS

A test version of our 2dFdr Pipeline As a Web Service (PAWS) is now available from

This page contains some initial documentation that we will grow over time.

The 2dFdr PAWS system allows users to request On Demand reductions of 2dF+AAOmega observations.

Reductions will take place on Data Central systems without users having to worry about downloading data or installing 2dFdr.


The current workflow is as follows:

  1. Load the query page of the new AAT archive from the link above.
  2. Select Instrument: 2dF+AAOmega.
  3. Select Observation Type: OBJECT
  4. Enter other details to find observations you want to reduce.
  5. Ensure you are logged in via your Data Central credentials (Login button at top right of page)
  6. Once logged in, select data you want reduced.
  7. Click the Reduce with 2dFdr PAWS button.
  8. A new tab (popup) will appear, asking you to select some default parameters.
  9. Click the Make it so button to submit the job.
  10. You will receive an email at the start and end of each job.
  11. The status of your jobs may be seen at
  12. Once files are reduced you may select from several download options or explore the data interactively.
  13. When appropriate, spectra from different gratings (e.g. 580V and 385R) are spliced together.
  14. A pdf of each reduced data product are also produced (individual reduced frames and spliced spectra).

Caveats and notes

  • The initial set of 2dFdr parameters is not exhaustive and may be revised based upon user feedback.
  • For testing purposes we currently use 2dFdr 7.3. This will be updated in the near future.
    • The 2dFdr version used is logged to log.2dfdr_aaorun_version.txt in the data products folder.
  • Log files record the output of individual 2dFdr commands (executed via the command line aaorun program).
  • Flux standards are not yet included in the reductions, even if requested (ndf_class of MFFLX).
  • You do not need to selection calibration files, only science observations (ndf_class of MFOBJECT).
    • The scripts that prepare the data for reduction searches the AAT archive for calibrations within:
      • 30 days (Arcs and Flat Fields) and,
      • 90 days (Biases and Darks).
    • We may revisit these windows if users encounter difficulties.


  • Please contact us to give feedback
June 1, 2022 by B. Miszalski
June 14, 2022, 2:52 a.m. B. Miszalski