Abstract
Context.GRB 041219a is the brightest burst localised by INTEGRAL. The peak flux of 43 ph cm-2 s-1 ( erg cm-2 s-1, 20 keV–8 MeV, 1 s integration) is greater than that for ~98% of all bursts and the T90 duration of ~186 s (~20 keV–8 MeV) is longer than all but a small number of bursts. The intense burst occurred about ~250 s after the precursor and the long delay enabled optical and near infrared telescopes to observe the prompt emission.
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