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

doi:10.1093/mnras/stw2440

CORC > 上海天文台 > 中国科学院上海天文台

	Multiwavelength temporal variability of the blazar 3C 454.3 during 2014 activity phase
	Kushwaha, Pankaj 3,4; Gupta, Alok C.1,5; Misra, Ranjeev 3; Singh, K. P.2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2017
卷号	464 期号:2 页码:2046-2052
关键词	Radiation Mechanisms: Non-thermal Galaxies: Active Galaxies: Jets Quasars: Individual: 3c 454.3 X-rays: Galaxies
ISSN号	0035-8711
DOI	10.1093/mnras/stw2440
英文摘要	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.
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000393647100056
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/32657]
专题	中国科学院上海天文台
通讯作者	Kushwaha, Pankaj; Gupta, Alok C.; Misra, Ranjeev
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China 2.TIFR, Dept Astron & Astrophys, Bombay 400005, Maharashtra, India 3.IUCAA, Pune 411007, Maharashtra, India 4.Univ Sao Paulo, Dept Astron IAG USP, BR-05508900 Sao Paulo, Brazil 5.Aryabhatta Res Inst Observat Sci ARIES, Naini Tal 263002, India
推荐引用方式 GB/T 7714	Kushwaha, Pankaj,Gupta, Alok C.,Misra, Ranjeev,et al. Multiwavelength temporal variability of the blazar 3C 454.3 during 2014 activity phase[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,464(2):2046-2052.
APA	Kushwaha, Pankaj,Gupta, Alok C.,Misra, Ranjeev,&Singh, K. P..(2017).Multiwavelength temporal variability of the blazar 3C 454.3 during 2014 activity phase.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,464(2),2046-2052.
MLA	Kushwaha, Pankaj,et al."Multiwavelength temporal variability of the blazar 3C 454.3 during 2014 activity phase".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 464.2(2017):2046-2052.