Discovery of circular polarization in the Intermediate Polar 1WGA J1958.2+3232

Abstract

We report on UBVRI polarimetry of the recently identified Intermediate Polar 1WGA J1958.2+3232, carried out on 2000 August, 4-6 at the Nordic Optical Telescope. Circular polarization was detected in R and I bands with an increasing absolute mean value with wavelength. There is evidence of possible modulation of the circular polarization at twice the previously reported white dwarf spin period, suggesting that it is the true period and that the modulation in optical and X-ray is dominated by the first harmonic. Indication of modulation at the orbital period is also present.

4 pages, 6 figures, accepted by A&A; editing changes only

References in corpus (2)

• The discovery of 12min X-ray pulsations from 1WGA J1958.2+3232
• The Orbital Period of Intermediate Polar 1WGA J1958.2+3232

Cited by in corpus (5)

• Magnetic White Dwarfs
• Circular polarization survey of intermediate polars I. Northern targets in the range 17h<R.A.<23h
• V405 Aurigae: A High Magnetic Field Intermediate Polar
• Pulsations and orbital modulation of the intermediate polar 1WGA J1958.2+3232
• On the spin modulated circular polarization from the intermediate polars NY Lup and IGRJ1509-6649