Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-02-09
Astronomy and Astrophysics
Astrophysics
To appear in the proceedings of the 16th Annual October Astrophysics Conference in Maryland "Gamma Ray Bursts in the Swift Era
Scientific paper
10.1063/1.2207947
As soon as it was realized that long GRBs lie at cosmological distances, attempts have been made to use them as cosmological probes. Besides their use as lighthouses, a task that presents mainly the technological challenge of a rapid deep high resolution follow-up, researchers attempted to find the Holy Grail: a way to create a standard candle from GRB observables. We discuss here the attempts and the discovery of the Ghirlanda correlation, to date the best method to standardize the GRB candle. Together with discussing the promises of this method, we will underline the open issues, the required calibrations and how to understand them and keep them under control. Even though GRB cosmology is a field in its infancy, ongoing work and studies will clarify soon if and how GRBs will be able to keep up to the promises.
Begelman Mitchell C.
Firmani Claudio
Ghirlanda Giancarlo
Ghisellini Gabriele
Lazzati Davide
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