Correlated Multifrequency Variability in the Blazars 3C 279 and PKS 1510-089

Details Correlated Multifrequency Variability in the Blazars 3C 279 and PKS 1510-089 Correlated Multifrequency Variability in the Blazars 3C 279 and PKS 1510-089

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.0802c&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #08.02; Bulletin of the American Astronomical Society, V

Astronomy and Astrophysics

Astronomy

Scientific paper

We have analyzed light curves of blazars 3C 279 and PKS 1510-089 in X-rays (RXTE-PCA, 2-10 keV), Optical (R band), and Radio (UMRAO) between 1996 and 2005. Power Spectral Densities (PSD) for both sources are power laws with slopes between -1.5 and -1.9 in all three bands with no significant `break' within the observed frequency range. Cross-correlation between X-rays and optical and X-rays and radio gives a high coefficient for 3C 279 and more modest value for PKS 1510-089. In each case, correlation between simulated light-curves generated randomly with a similar power spectrum as the real data indicates that the correlation is significant. The time delay between variations at high and low frequency bands undergoes large variations during the 10 years of observation for both sources. A large shift in time delay for 3C 279 occurred near the time of a major multifrequency flare in 2001. This coincided with the onset of a swing toward a more southerly direction of the trajectories of new superluminal radio knots.
This research was funded in part by the National Science Foundation through grant AST-0406865 and by NASA through several RXTE Guest Investigator Program grants, most recently NNG05GM33G and NNG05GM64G.

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