On the 2007 July flare of the blazar 3C 454.3

被引：51

作者：

Ghisellini, Gabriele

Foschini, Luigi

Tavecchio, Fabrizio

Pian, Elena

机构：

[1] INAF Osservatorio Astron Brera, I-23807 Merate, Italy

[2] INAF IASF Bologna, I-40129 Bologna, Italy

[3] Osserv Astron Trieste, INAF, I-34131 Trieste, Italy

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2007年 / 382卷 / 01期

关键词：

radiation mechanisms : non-thermal; galaxies : active; galaxies : individual : 3C 454.3; galaxies : jets;

D O I：

10.1111/j.1745-3933.2007.00397.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In 2007 July, the blazar 3C 454.3 underwent a flare in the optical, reaching R similar to 13 on July 19. Then the optical flux decreased by one magnitude, being R similar to 14 when the source was detected by the gamma-ray satellite AGILE, which observed the source on July 24-30. At the same time, the Swift satellite performed a series of snapshots. We can construct the simultaneous spectral energy distribution using optical, ultraviolet, X-ray and gamma-ray data. These show that an increased gamma-ray flux is accompanied by a weaker optical/X-ray flux with respect to the flare observed in the spring of 2005 by INTEGRAL and Swift. This confirms earlier suggestions about the behaviour of the jet of 3C 454.3.

引用

页码：L82 / L86

页数：5

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