... regions

Based on observations collected at the European Southern Observatory, Chile: programme ID 077.D-0488(A), and archive programmes: 64.H-0375(A), 66.D-0576(A) and 275.D-5039(A).

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... third

http://www.mpe.mpg.de/~jcg/grbgen.html

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...(Jakobsson et al. 2006)

http://www.astro.ku.dk/~pallja/GRBsample.html

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... coverage

The spectrum presented in Hammer et al. (2006) also has significantly more lines than listed in the paper.

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... DR4

http://www.mpa-garching.mpg.de/SDSS/

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