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Basic informations about GRBs
Gamma-Ray Bursts (GRBs) are very short and intense pulses of soft gamma-rays. Typical burst lasts from a fraction of a second to several hundred seconds. GRBs arrive from random directions in the sky. In gamma-rays, GRBs are the most luminous sources on the sky. Total energy, emitted during the burst (assuming spherical explosion) is of the order of ~10^49 - 10^51 erg. To emit such an amount of energy the Sun should shine from one billion to 100 billions years!
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