Triggers:GRBs

Very short-lived optical transients associated with enormous gamma-ray outbursts. A catalogue of GRBs is available here. Comprehensive recent review on GRBs and their physics can be found in Piran,2005

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

from Wozniak et al. 2006

from Sokolowski et al.2009

Detecting GRBs with Gaia

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.