Abstract
view Abstract Citations (15) References (16) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Internight and Intranight Variations in the Wavelength Dependent Polarization of OJ 287 Sillanpaa, A. ; Takalo, L. O. ; Kikuchi, S. ; Kidger, M. ; de Diego, J. A. Abstract We have obtained simultaneous UBVRI photopolarimetric observations of the highly variable BL Lac object OJ 287 on six nights. The polarization and position angle as well as their wavelength dependence, have been found to be variable from night to night and also on a timescale ofa few hours. These are the first simultaneous UBVRI polarimetric observations accurate enough to detect these variations. During the first three consecutive nights we observed a clear anticorrelation between the flux density and the degree of polarization such that when the object brightened the polarization decreased. During the same nights we also observed a possible rotation in the p_x_p_y_ plane. These observations are not easily explained by a single component synchrotron model; a better explanation would be a relativistic jet pointing towards us, with shocked, highly polarized clumps rotating inside it. Publication: The Astronomical Journal Pub Date: June 1991 DOI: 10.1086/115826 Bibcode: 1991AJ....101.2017S Keywords: Bl Lacertae Objects; Polarimetry; Ubv Spectra; Astronomical Photometry; Interstellar Magnetic Fields; Astrophysics; BL LACERTAE OBJECTS full text sources ADS | data products SIMBAD (1) NED (1)
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