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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Multiwavelength temporal variability of the blazar 3C 454.3 during 2014 activity phase

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Kushwaha, Pankaj ; Gupta, Alok C. ; Misra, Ranjeev ; Singh, K. P.
Total Authors: 4
Document type: Journal article
Source: Monthly Notices of the Royal Astronomical Society; v. 464, n. 2, p. 2046-2052, JAN 2017.
Web of Science Citations: 8

We present a multiwavelength temporal analysis of the blazar 3C 454.3 during the high gamma-ray active period from May to December, 2014. Except for X-rays, the period is well sampled at near-infrared (NIR)-optical by the Small and Moderate Aperture Research Telescope System (SMARTS) facility, and the source is detected continuously on daily time-scale in the Fermi-Large Area Telescope gamma-ray band. The source exhibits diverse levels of variability with many flaring/active states in the continuously sampled gamma-ray light curve which are also reflected in the NIR-optical light curves and the sparsely sampled X-ray light curve by the Swift-XRT. Multiband correlation analysis of this continuous segment during different activity periods shows a change of state from no lags between IR and gamma-ray, optical and gamma-ray, and IR and optical to a state where gamma-ray lags the IR/optical by similar to 3 d. The results are consistent with the previous studies of the same during various gamma-ray flaring and active episodes of the source. This consistency, in turn, suggests an extended localized emission region with almost similar conditions during various gamma-ray activity states. On the other hand, the delay of gamma-ray with respect to IR/optical and a trend similar to IR/optical in X-rays along with strong broad-band correlations favour magnetic field related origin with X-ray and gamma-ray being inverse Comptonization of IR/optical photons and external radiation field, respectively. (AU)

FAPESP's process: 15/13933-0 - Probing relativistic jets and high energy emission through Multi-wavelength observation analysis
Grantee:Pankaj Kushwaha
Support type: Scholarships in Brazil - Post-Doctorate