FERMI GAMMA-RAY SPACE TELESCOPE OBSERVATIONS OF THE GAMMA-RAY OUTBURST FROM 3C454.3 IN NOVEMBER 2010
2011 (English)In: The Astrophysical Journal Letters, ISSN 2041-8205, Vol. 733, no 2, L26- p.Article in journal (Refereed) Published
The flat-spectrum radio quasar 3C454.3 underwent an extraordinary 5 day gamma-ray outburst in 2010 November when the daily flux measured with the Fermi Large Area Telescope (LAT) at photon energies E > 100 MeV reached (66 +/- 2) x 10(-6) photons cm(-2) s(-1). This is a factor of three higher than its previous maximum flux recorded in 2009 December and greater than or similar to 5 times brighter than the Vela pulsar, which is normally the brightest source in the gamma-ray sky. The 3 hr peak flux was (85 +/- 5) x 10(-6) photons cm-2 s(-1), corresponding to an apparent isotropic luminosity of (2.1 +/- 0.2) x10(50) erg s(-1), the highest ever recorded for a blazar. In this Letter, we investigate the features of this exceptional event in the gamma-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.
Place, publisher, year, edition, pages
2011. Vol. 733, no 2, L26- p.
IdentifiersURN: urn:nbn:se:su:diva-67591DOI: 10.1088/2041-8205/733/2/L26ISI: 000293135000010OAI: oai:DiVA.org:su-67591DiVA: diva2:470466
authorCount :1532011-12-292011-12-292011-12-29Bibliographically approved