Short Gamma Ray Bursts Detected by INTEGRAL

The INTEGRAL Burst Alert System (IBAS) has detected and localised 71 Gamma-Ray Bursts (GRBs) as of January 2010.Of these only three have a T 90 duration less than 2 seconds.Short GRBs are believed to be produced in the merger of compact objects such as neutron stars and black holes.The short bursts detected by INTEGRAL are GRB 070707, GRB 071017 and GRB 081226B with values of T 90 of 0.8, 0.4 and 0.4 seconds respectively.There are no redshift determinations for any of these bursts.GRB 070707 and GRB 081226B are spectrally hard bursts which is consistent with the short GRB classification.GRB 071017 has a much softer spectrum and is located within 0.25 degrees of the galactic plane indicating that it may be a galactic transient such as Swift J195509+261406 associated with GRB 070610.We estimate the rate of these galactic transients as ∼2 per year.The temporal and spectral properties of the three bursts are presented including peak flux, fluence and photon indices.