Simultaneous Multiwavelength and Optical Microvariability Observations of CTA 102 (PKS J2232+1143)

Details Simultaneous Multiwavelength and Optical Microvariability Observations of CTA 102 (PKS J2232+1143) Simultaneous Multiwavelength and Optical Microvariability Observations of CTA 102 (PKS J2232+1143)

2009-11-09

arxiv.org/abs/0911.1481v1

The Astronomical Journal 138 (2009) 1902-1910

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

AJ in press. Manuscript contains 29 pages, 13 figures

Scientific paper

10.1088/0004-6256/138/6/1902

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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