Savaglio, S. and Fall, S. M. (2005) The dust depletion and extinction of the GRB 020813 afterglow. Il nuovo cimento C, 28 (4\5). pp. 541-544. ISSN 1826-9885
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Abstract
The Keck optical spectrum of the GRB 020813 afterglow is the best ever obtained for GRBs. Its large spectral range and very high S/N ratio allowed for the first time the detection of a vast variety of absorption lines, associated with the circumburst medium or interstellar medium of the host. The remarkable similarity of the relative abundances of 8 elements with the dust depletion pattern seen in the Galactic ISM suggests the presence of dust. The derived visual dust extinction AV = 0.40±0.06 contradicts the featureless UV spectrum of the afterglow, very well described by a unreddened power law. The forthcoming Swift era will open exciting opportunities to explain similar phenomena in other GRB afterglows.
| Item Type: | Article |
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| Additional Information: | Paper presented at the “4th Workshop on Gamma-Ray Burst in the Afterglow Era”, Rome, October 18-22, 2004. |
| Uncontrolled Keywords: | γ-ray sources; γ-ray bursts |
| Subjects: | 500 Scienze naturali e Matematica > 520 Astronomia e scienze connesse |
| Depositing User: | Marina Spanti |
| Date Deposited: | 16 Mar 2020 17:03 |
| Last Modified: | 16 Mar 2020 17:03 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/15774 |
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