J0255-5304 DM Variation
Most of the literature for J0255-5304 cites a DM of 15.9 Recent processing of MWA VCS data (obsid 1253471952) shows that the DM is closer to 18:
A change of 2 in DM is not a regular occurrence, further processing of older MWA data might shed some light on this apparent DM fluctuation.