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SIMULTANEOUS MULTIWAVELENGTH AND OPTICAL MICROVARIABILITY OBSERVATIONS OF CTA 102 (PKS J2232+1143)

Angela Osterman MeyerEvelyn L. Egan Observatory at Florida Gulf Coast University, College of Arts and Sciences, 10501 FGCU Blvd, S., Fort Myers, FL 33965, USA; [email protected]H. Richard MillerDepartment of Physics and Astronomy, Georgia State University, 1 Park Place ste. 730, Atlanta, GA 30303, USAKevin MarshallDepartment of Physics and Astronomy, Bucknell University, 701 Moore Avenue, Lewisburg, PA 17837, USAWesley T. RyleDepartment of Math and Physics, Thomas More College, 333 Thomas More Parkway, Crestview Hills, KY 41017, USAHugh AllerDepartment of Astronomy, University of Michigan, 500 Church St., 830 Dennison, Ann Arbor, MI 48109-1042, USAMargo AllerDepartment of Astronomy, University of Michigan, 500 Church St., 830 Dennison, Ann Arbor, MI 48109-1042, USATom BalonekFoggy Bottom Observatory at Colgate University, Hamilton, NY, USA

2009en

ABI

Аннотация

We present analysis of both the short-term optical and long-term multiwavelength variability of CTA 102. In 2004, this object was observed in an intense optical flaring state. Extensive R-band microvariability observations were carried out during this high state. In 2005, we obtained several weeks of contemporaneous radio, optical, and X-ray observations of CTA 102. These observations recorded distinct flaring activity in all three wavebands. Subsequent analysis revealed that this object may appear redder when in a brighter optical state, and that the X-ray, optical, and radio activity do not appear to be correlated. The shape of the observed spectral energy distributions suggests that both synchrotron-related and external inverse Compton processes may contribute to the X-ray emission. Our results are also compared with other results on this object and archival microvariability observations. It appears that more rapid, dramatic microvariability events occur when CTA 102 is in an elevated optical flux state.

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DOI: 10.1088/0004-6256/138/6/1902

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