Kushwaha, Pankaj ; Gupta, Alok C. ; Misra, Ranjeev ; Singh, K. P.
Número total de Autores: 4
|Tipo de documento:||Artigo Científico|
|Fonte:||Monthly Notices of the Royal Astronomical Society; v. 464, n. 2, p. 2046-2052, JAN 2017.|
|Citações Web of Science:||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)
|Processo FAPESP:||15/13933-0 - Investigação de jatos relativísticos e sua emissão em altas energia por meio da análise de observações em multi-comprimenti-de-onda|
|Linha de fomento:||Bolsas no Brasil - Pós-Doutorado|