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Dissecting the GRB environment with optical and X-ray observations

Published online by Cambridge University Press:  22 July 2013

S. Campana
S. Campana*
Affiliation:
INAF - Osservatorio astronomico di Brera, via Bianchi 46, 23807 Merate (LC), Italy;. e-mail: sergio.campana@brera.inaf.it
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Abstract

GRB’s environment can be studied through the imprint (i.e. absorption) it leaves on the afterglow emission. Fast optical observations allowed us to observe line variability and to derive the distance and composition of the absorbing medium. However, given the huge GRB ionizing flux, this medium starts showing up in the optical spectra only at relatively large distances (100 pc). A complementary view comes from the X-ray band, where the overall contribution of all metals bends the power law X-ray afterglow spectrum. We will review and compare optical and X-ray studies of the circumbust medium.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 61: Gamma-ray Bursts: 15 Years of GRB Afterglows – Progenitors, Environments and Host Galaxies from the Nearby to the Early Universe , 2013 , pp. 359 - 365
Copyright
© EAS, EDP Sciences 2013

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