We are making available a database with reference spectra (individual scans) taken with all heterodyne receivers at APEX. You can visit this list if you want to check for calibration variations between different epochs, for example if your project was observed in different observing runs or even in different years. These calibration CO or HCN scans are regularly taken together with the scientific observations for all projects.
Currently the database includes data from July 2018 onwards. You can access the Grafana interface by clicking in the image below. We have also linked this page from the section under APEX data.
Remember these indications about the use of the dashboard (some are directly written there):
We remind APEX users that we still have available calibration plan information for SHeFI data with a search engine and an interface to our database.