The recent studies of early afterglows of Gamma-Ray Bursts (GRB) with Swift
satellite reveals some interesting phenomena which we are modelling with
\"Quark-Nova\". This involves strange stars which operate in two steps. In
step one, normal nuclear matter gets converted to strange quark matter due
to the extreme physical conditions created by a supernova. This strange
quark matter then shrinks to form a strange star. The strange star contains
charge neutral, beta equilibrated strange quark matter and is surrounded by
a thin electron cloud. The energy released during the conversion process is
emitted as a GRB. In step two, the remaining normal matter envelope
material in the supernova remnant falls freely to form a crust for the
strange star. The collision of infalling particles with the electrons of
the cloud produces X-ray afterglows. This production of X-ray from
collisions causes the observed broken power law in the afterglow light
curve.
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