Measuring the Kinematics of Supernova Remnants: A Multiepoch Maximum Likelihood Estimation Approach Demonstrated on Chandra X-ray Observations of Cassiopeia A

This paper presents a novel multiepoch maximum likelihood estimation (MLE) method for accurately measuring the proper motion of features in supernova remnants (SNRs) by analyzing multi-epoch X-ray observations while accounting for instrument response and point-spread function effects.