CalibrationLookupError

exception lsst.daf.butler.CalibrationLookupError

Exception raised for failures to look up a calibration dataset.

For a find-first query involving a calibration dataset to work, either the query’s result rows need to include a temporal dimension or needs to be constrained temporally, such that each result row corresponds to a unique calibration dataset. This exception can be raised if those dimensions or constraint are missing, or if a temporal dimension timespan overlaps multiple validity ranges (e.g. the recommended bias changes in the middle of an exposure).