On the July 2007 flare of the blazar 3C 454.3

Details On the July 2007 flare of the blazar 3C 454.3 On the July 2007 flare of the blazar 3C 454.3

2007-08-04

arxiv.org/abs/0708.0617v2

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures, MNRAS (Letters) in press (minor revision)

Scientific paper

10.1111/j.1745-3933.2007.00397.x

In July 2007, the blazar 3C 454.3 underwent a flare in the optical, reaching R~13 on July 19. Then the optical flux decreased by one magnitude, being R~14 when the source was detected by the gamma-ray satellite AGILE, that 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, UV, X-ray and gamma-ray data. These shows that an increased gamma-ray flux is accompanied by a weaker optical/X-ray flux with respect to the flare observed in the Spring 2005 by INTEGRAL and Swift. This confirms earlier suggestions about the behaviour of the jet of 3C 454.3.

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