\citet{Reilly_2017} FORS2 Optical specpol for SN 2009ip during the 2012 outbursts. 
About SN 2009ip
Polarimetric observations by FORS2 on the VLT, 35, 42, 64, 68, 73, and 83 days after the 2012b outburst
Interpretation of polarimetry

II-P