All about APEX data

Do you want to…

…access archival APEX data products?

All APEX data are stored in the ESO archive and most of them become public after some proprietary period. Check here more information about what data is available, the different rules for proprietary periods and how to access APEX data.

…publish your research based on APEX data?

We cannot be more happy about that! Please remember that:

  • We request that any publication using APEX data, including the public science verification data, adds the following acknowledgement:
    “This publication is based on data acquired with the Atacama Pathfinder Experiment (APEX) under programme ID [TP.C-NNNN(R)]. APEX is a collaboration between the Max-Planck-Institut fur Radioastronomie, the European Southern Observatory, and the Onsala Space Observatory.” If your data is obtained during Swedish time, please add “Swedish observations on APEX are supported through Swedish Research Council grant No 2017-00648“.
  • After you publish, we encourage you to provide your reduced and calibrated data to the ESO archive through the Phase 3 system. Providing your reduced data to the community facilitates other ESO archive users to reuse your dataset and at the same time disseminating and referring to your work.

… know about APEX data reduction?

The APEX raw data are stored in the so-called MBFITS data format.

For heterodyne observations, these raw data are calibrated online by the apexOnlineCalibrator program, which writes the calibrated spectra (TA*scale) into a CLASS-format data file. The data can be further reduced and analysed using CLASS, GREG, MAPPING programs included in the GILDAS software package.

For bolometer observations you need to work directly on the MBFITS files. There are various packages available for the data reduction of different instruments. We refer you to the page about bolometer data reduction for more specific information.

Related documents


Multi-Beam FITS Raw Data Format (ICD) 1.02 MB 93 downloads

Interface Control Document by D. Muders ...

APEX calibrator and data reduction manual 791.33 KB 123 downloads

by E. Polehampton and H. Hafok. ...