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grb absorption spectroscopy - Inaf

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MAIN SYSTEM METALLICITY<br />

Ly_α<br />

Missing lines<br />

Saturation<br />

Ly_β<br />

Contamination<br />

Metallicity is in the range<br />

4.2X10 -3 -1.4X10 -2 , i.e., among the<br />

lowest in GRB hosts.<br />

N H =21.60±0.07 cm -2

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