Examples of bathtub like rings on a 3pi y band image, present on the original exposures, and visible on skycell.1923.103 in the diffs.

when processed with the tag (ipp-20101215) , they are not detected.

||[[Image(3pi.267472.tag.png, 600px)]]||[[Image(3pi.267472.streaks.png, 600px)]] ||

when processed with eam's branch, they are detected in magic.

||[[Image(3pi.267472.eam.png, 600px)]] ||[[Image(3pi.267472.eam.streaks.png, 600px)]]||

Here is the skycell diff with most of these rings:

|| ipp-20101215|| eam ipp ||
|| [[Image(defaulttrunk.skycell.1923.103.jpeg, 600px)]]|| [[Image(eamdiff.jpeg, 600px)]] ||