The flat-spectrum radio quasar 3C454.3 underwent an extraordinary 5 day γ-ray outburst in 2010 November when the daily flux measured with the Fermi Large Area Telescope (LAT) at photon energies E > 100MeV reached (66 2) × 10-6 photons cm-2 s-1. This is a factor of three higher than its previous maximum flux recorded in 2009 December and ≳ 5 times brighter than the Vela pulsar, which is normally the brightest source in the γ-ray sky. The 3hr peak flux was (85 5)×10-6 photons cm-2 s-1, corresponding to an apparent isotropic luminosity of (2.1 0.2)×1050 erg s-1, the highest ever recorded for a blazar. In this Letter, we investigate the features of this exceptional event in the γ-ray band of the Fermi-LAT. In contrast to previous flares of the same source observed with the Fermi-LAT, clear spectral changes are observed during the flare.

Fermi gamma-ray space telescope observations of the gamma-ray outburst from 3C454.3 in November 2010 / Abdo, A.a., Ackermann, M., Ajello, M., Allafort, A., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bellazzini, R., Berenji, B., Blandford, R.d., Bloom, E.d., Bonamente, E., Borgland, A.w., Bouvier, A., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., et al.. - In: THE ASTROPHYSICAL JOURNAL LETTERS. - ISSN 2041-8205. - 733:2(2011). [10.1088/2041-8205/733/2/L26]

Fermi gamma-ray space telescope observations of the gamma-ray outburst from 3C454.3 in November 2010

FAVUZZI, Cecilia;GIGLIETTO, Nicola;
2011

Abstract

The flat-spectrum radio quasar 3C454.3 underwent an extraordinary 5 day γ-ray outburst in 2010 November when the daily flux measured with the Fermi Large Area Telescope (LAT) at photon energies E > 100MeV reached (66 2) × 10-6 photons cm-2 s-1. This is a factor of three higher than its previous maximum flux recorded in 2009 December and ≳ 5 times brighter than the Vela pulsar, which is normally the brightest source in the γ-ray sky. The 3hr peak flux was (85 5)×10-6 photons cm-2 s-1, corresponding to an apparent isotropic luminosity of (2.1 0.2)×1050 erg s-1, the highest ever recorded for a blazar. In this Letter, we investigate the features of this exceptional event in the γ-ray band of the Fermi-LAT. In contrast to previous flares of the same source observed with the Fermi-LAT, clear spectral changes are observed during the flare.
2011
Fermi gamma-ray space telescope observations of the gamma-ray outburst from 3C454.3 in November 2010 / Abdo, A.a., Ackermann, M., Ajello, M., Allafort, A., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bellazzini, R., Berenji, B., Blandford, R.d., Bloom, E.d., Bonamente, E., Borgland, A.w., Bouvier, A., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., et al.. - In: THE ASTROPHYSICAL JOURNAL LETTERS. - ISSN 2041-8205. - 733:2(2011). [10.1088/2041-8205/733/2/L26]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/52255
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