We report photopolarimetric observations of a new eclipsing polar ( AM Herculis system ) discovered in the Calán-Tololo survey .
The photometry and polarimetry are modulated on a period of \sim 101 minutes .
Circular polarization variations are seen from \sim - 8 to +12 per cent and from \sim 0 to 5 per cent in the red and blue parts of the optical spectrum , respectively .
Two linearly polarized pulses are detected at orbital phases coinciding with the reversals in the circular polarization .
This is consistent with a magnetic field strength of \sim 20 MG for the white dwarf primary , where accretion takes place at two regions .
Both accretion regions are self-occulted by the white dwarf during parts of the orbit .
We estimate some of the system ’ s parameters from its eclipses , which we further refine by modelling the polarimetric observations .