Does the gamma-ray flux of the blazar 3C 454.3 vary on sub-hour timescales?

Details Does the gamma-ray flux of the blazar 3C 454.3 vary on sub-hour timescales? Does the gamma-ray flux of the blazar 3C 454.3 vary on sub-hour timescales?

2010-04-26

arxiv.org/abs/1004.4518v2

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

4 pages, 2 figures. Accepted for publication on MNRAS. Section 1 completely rewritten and enlarged

Scientific paper

In the early days of April 2010, the blazar 3C 454.3 (z=0.859) underwent a strong gamma-ray outburst, reaching fluxes (E > 100 MeV) in excess of 10^-5 ph cm^-2 s^-1. The Fermi Gamma ray Space Telescope performed a 200 ks long pointed observation starting from 5 April 2010 19:38 UTC. This allowed us to try probing the variability of the gamma-ray emission on timescales of hours or less. We found the variability on a few hours timescale. On sub-hour timescale we found no evidence of significant variability, although the present statistics is not yet conclusive and further observations are needed.

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