Triggers:GRBs

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Very short-lived optical transients associated with enormous gamma-ray outbursts. A catalogue of GRBs is available here.

  • time-scales from seconds to minutes
  • in maximum can reach up to few mag, but the whole range observed
  • host galaxy can be visible

GRB06-RAPTOR.png from Wozniak et al. 2006

GRB08-PI.png from Sokolowski et al.2009

Detecting GRBs with Gaia

Thumb Gaia detection efficiency for GRBs in per cents.

Only about 1% of GRBs is detectable by Gaia. The main feature visible in the data is steady and rapid decline over AF CCDs. Time sampling at AF CCDs level is 4.4s per CCD. If we also demand the transient to be visible in the second FOV (after 105 min), the efficiency drops dramatically.