IXPE XRT CALDB Changelog for version 20240726, released on 2023-08-20 1. Updated orbital boom drift parameters for the ixpeboomdriftcorr module. a. NOTE: These new files completely replace the previous files and are for use with HEADAS version 6.34 and above only. They contain an entirely new set of parameters for the updated boom drift model. b. CALDB/data/ixpe/xrt/bcf/boomdrift/ixpe_a0_20220111_boomdrift_02.fits i. Boom drift parameters for the time between the boom alignment adjustment of 2022-01-11 and the boom alignment adjustment of 2022-06-05. c. CALDB/data/ixpe/xrt/bcf/boomdrift/ixpe_a0_20220605_boomdrift_02.fits i. Boom drift parameters for the time from the boom alignment adjustment of 2022-06-05 to present.