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Why are the associated GEOMETRY and ASTROMETRY reference files so old?
I am reducing newly taken MUSE data from the beginning of 2024. Yet the associated geometry and astrometry files are from April 2021. Where are the newer reference files? Instead of providing a new MASTER_DARK which rarely changes, run the astrometry and geometry calibration sequence more often (considering Chile experiences numerous earthquakes a year, etc.).
Answer
Dear User,
The MUSE GEOMETRY and ASTROMETRY calibration frames are taken regularly. They are processed automatically and checked for quality. The quality parameters are monitored in the specially designed Health Check plots:
https://www.eso.org/observing/dfo/quality/MUSE/reports/HEALTH/trend_report_GEOMETRY_HC.html
https://www.eso.org/observing/dfo/quality/MUSE/reports/HEALTH/trend_report_ASTROMETRY_WFM_HC.html
https://www.eso.org/observing/dfo/quality/MUSE/reports/HEALTH/trend_report_ASTROMETRY_NFM_HC.html
The MUSE geometry calibrations are quite high volume (~6 GB, 70 input raw frames) and their processing is hardware demanding. Thus, early in operations the decision was taken to provide the users only with the static (frozen in time) version of the master GEOMETRY_TABLE. The regular monitoring shows if there is a need to produce modified, newer version. Since April 2021 there has not been such a need identified yet. That is why the April 2021 version is still distributed with the 2024 science data. The MUSE astrometry is closely tide with geometry, so it is also provided in the static form. The ASTROMETRY version corresponds to the distributed GEOMETRY version.
There is always a possibility to download the latest calibrations (raw data) from the ESO Archive at: http://archive.eso.org/wdb/wdb/eso/muse/form and process them if the users prefer to repeat the data processing themselves.
Hope this answers your question.
Best regards,
The ESO Archive Team
Customer support service by UserEcho
Dear User,
The MUSE GEOMETRY and ASTROMETRY calibration frames are taken regularly. They are processed automatically and checked for quality. The quality parameters are monitored in the specially designed Health Check plots:
https://www.eso.org/observing/dfo/quality/MUSE/reports/HEALTH/trend_report_GEOMETRY_HC.html
https://www.eso.org/observing/dfo/quality/MUSE/reports/HEALTH/trend_report_ASTROMETRY_WFM_HC.html
https://www.eso.org/observing/dfo/quality/MUSE/reports/HEALTH/trend_report_ASTROMETRY_NFM_HC.html
The MUSE geometry calibrations are quite high volume (~6 GB, 70 input raw frames) and their processing is hardware demanding. Thus, early in operations the decision was taken to provide the users only with the static (frozen in time) version of the master GEOMETRY_TABLE. The regular monitoring shows if there is a need to produce modified, newer version. Since April 2021 there has not been such a need identified yet. That is why the April 2021 version is still distributed with the 2024 science data. The MUSE astrometry is closely tide with geometry, so it is also provided in the static form. The ASTROMETRY version corresponds to the distributed GEOMETRY version.
There is always a possibility to download the latest calibrations (raw data) from the ESO Archive at: http://archive.eso.org/wdb/wdb/eso/muse/form and process them if the users prefer to repeat the data processing themselves.
Hope this answers your question.
Best regards,
The ESO Archive Team