Decreasing gamma-ray emission from the blazar 3C 454.3

Following the exceptional gamma-ray activity from the FSRQ 3C 454.3 (reported in the ATels #3034, #3043, and #3041), the source flux is currently decreasing, as monitored by the AGILE satellite. 3C 454.3 reached its peak emission approximately during the period Nov. 18-20, 2010. Integrating between MJD 55518.3 and MJD 55520.3, a maximum likelihood analysis gives an average flux F=(54.5 +/- 4.2) e-6 ph/cm2/sec (E > 100 MeV).