We report the first blazar detection by the AGILE satellite. AGILE detected 3C 454.3 during a period of strongly enhanced optical emission in July 2007. AGILE observed the source with a dedicated repointing during the period 2007 July 24-30 with its two co-aligned imagers, the Gamma-Ray Imaging Detector and the hard X-ray imager Super-AGILE sensitive in the 30 MeV-50 GeV and 18-60 keV, respectively. Over the entire period, AGILE detected gamma-ray emission from 3C 454.3 at a significance level of 13.8-$\sigma$ with an average flux (E$>$100 MeV) of $(280 \pm 40) \times 10^{-8}$ photons cm$^{-2}$ s$^{-1}$. The gamma-ray flux appears to be variable towards the end of the observation. No emission was detected by Super-AGILE in the energy range 20-60 keV, with a 3-$\sigma$ upper limit of $2.3 \times 10^{-3}$ photons cm$^{-2}$ s$^{-1}$. The gamma-ray flux level of 3C 454.3 detected by AGILE is the highest ever detected for this quasar and among the most intense gamma-ray fluxes ever detected from Flat Spectrum Radio Quasars.

/pdf/agile-detection-of-a-strong-gamma-ray-flare-from-the-blazar-39rcczg6l4.pdf

AGILE detection of a strong gamma-ray flare from the blazar 3C 454.3

We review 6 years of INTEGRAL observations of blazars, from Target-Of-Opportunity (TOO) to normal observations to coordinated campaigns, from the new and unexpected discoveries to the improvements in this research field. We also shortly review what is expected from INTEGRAL for the forthcoming years.

/pdf/the-contribution-of-integral-to-blazar-science-2zi6e54iqa.pdf

The contribution of INTEGRAL to blazar science

We report the first blazar detection by AGILE. AGILE detected 3C 454.3 during a period of strongly enhanced optical emission in 2007 July. AGILE observed the source with a dedicated repointing during the period 2007 July 24-30 with its two co-aligned imagers, the Gamma-Ray Imaging Detector and the hard X-ray imager Super-AGILE sensitive in the 30 MeV to 50 GeV and 18-60 keV ranges, respectively. Over the entire period, AGILE detected γ-ray emission from 3C 454.3 at a significance level of 13.8 σ with an average flux (E > 100 MeV) of (280 ± 40) × 10-8 photons cm-2 s-1. The γ-ray flux appears to be variable toward the end of the observation. No emission was detected by Super-AGILE in the energy range 20-60 keV, with a 3 σ upper limit of 2.3 × 10-3 photons cm-2 s-1. The γ-ray flux level of 3C 454.3 detected by AGILE is the highest ever detected for this quasar and among the most intense γ-ray fluxes ever detected from flat-spectrum radio quasars.

/pdf/agile-detection-of-a-strong-gamma-ray-flare-from-the-blazar-22po3071pc.pdf

AGILE Detection of a Strong Gamma-Ray Flare from the Blazar 3C 454.3

AGILE pointing at 3C 454.3: end of the observations and preliminary results.

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AGILE pointing at 3C 454.3: end of the observations and preliminary results.