Welcome onto the Dynamic VO-Compliant
Bad Calibrators Catalogue for optical interferometry.


Search for bad calibrators






View the bad calibrators list


Service description

BadCal is an entry to the BadCalibrator database developed by the JMMC Working Group "catalogue of calibration sources" .

You have different way to access the database:

The BadCalibrator database VO service has been developed by the JMMC Working Group "catalogue of calibration sources" and is used by our SearchCal tool. The database itself stems from the one originally developed by the IAU working group on optical interferometry (J.D. Monnier, Univ. Michigan, then C. Hummel, ESO), and you can contribute to extend it by signaling new bad calibrators.