Based on observations with INTEGRAL, an ESA project with instruments and science data centre funded by ESA member states (especially
the PI countries: Denmark, France, Germany, Italy, Switzerland, Spain), Czech Republic and Poland, and with the participation of Russia
and the USA,
and on observations collected by the Gamma-Ray
Burst Collaboration at ESO (GRACE) at the European Sourthern Observatory,
Paranal, Chile (Programme 70.D-0523).
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