Photometry of the magnetic white dwarf SDSS 121209.31+013627.7
Abstract
The results of 27 h of time series photometry of SDSS 121209.31+013627.7 are presented.
The binary period established from spectroscopy is confirmed and refined to 0.061 412 d
(88.43 min). The photometric variations are dominated by a brightening of about 16 mmag,
lasting a little less than half a binary cycle. The amplitude is approximately the same in V, R
and white light. A secondary small brightness increase during each cycle may also be present.
We speculate that SDSS 121209.31+013627.7 may be a polar in a low state.