Further Studies of the Optical Variability of OJ 287
نویسندگان
چکیده
منابع مشابه
S ep 1 99 8 The Infrared and Optical Variability of OJ 287
Received ; accepted – 2 – ABSTRACT In this paper, the long-term historical optical (UBVRI) and near-infrared (JHK) data are presented with some new observations in the optical (February 1994-January 1995) and near-infrared (November 1995) bands included for BL Lac object OJ287. The new optical data in V-band are in agreement with the results reported by other authors (Sillanpaa et al. 1996a; Ar...
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چکیده ندارد.
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We present preliminary data from high-cadence 15-GHz VLBA images of OJ 287 from 1995 to 2015. The ridgelines suggest that the jet is rotating, perhaps with a period of ∼30 years. The EVPA of the core rotated by 240◦ in 2001–2002 and decreased slowly after that. The inner jet apparently moved to a new direction after the rotation, as shown by the emergence of a new component at a new PA at 43 GH...
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We use a continuous wavelet transform to analyze more than two decades of data for the BL Lac object OJ 287 acquired as part of the UMRAO variability program. We find clear evidence for a persistent modulation of the total flux and polarization with period ∼ 1.66 years, and for another signal that dominates activity in the 1980s with period ∼ 1.12 years. The relationship between these two varia...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1974
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/168.2.417