Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/39164
Title: Gamma-ray Burst host galaxy gas and dust
Authors: Starling, Rhaana
Wijers, R.
Wiersema, K.
First Published: Sep-2008
Award date: 29-Jul-2006
Presented at: MG11 Meeting on General Relativity. Berlin, Germany
Start Date: 23-Jul-2006
Publisher: World Scientific
Citation: The Eleventh Marcel Grossmann Meeting: pp. 2009-2011.
Abstract: We report on the results of a study to obtain limits on the absorbing columns to wards an initial sample of 10 long Gamma-Ray Bursts observed with BeppoSAX, using a new approach to SED fitting to nIR, optical and X-ray afterglow data, in count space and including the effects of metallicity. When testing MW, LMC and SMC extinction laws we find that SMC-like extinction provides the best fit in most cases. A MW-like ext inction curve is not preferred for any of these sources, largely since the 2175A bump, in principle detectable in all these afterglows, is not present in the data. We rule out an SMC-like gas-to-dust ratio or lower value for 4 of the hosts analysed here (assuming SMC metallicity and extinction law) whilst the remainder of the sample have too large an error to discriminate. We provide an accurate estimate of the line-of-sight extinction, improving upon the uncertainties for the majority of the extinction measurements made in previous studies of this sample.
DOI Link: 10.1142/9789812834300_0310
ISBN: 9789812834300
Links: http://www.worldscientific.com/doi/abs/10.1142/9789812834300_0310
http://hdl.handle.net/2381/39164
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Creative Commons “Attribution Non-Commercial No Derivatives” licence CC BY-NC-ND, further details of which can be found via the following link: http://creativecommons.org/licenses/by-nc-nd/4.0/ Archived with reference to SHERPA/RoMEO and publisher website.
Appears in Collections:Conference Papers & Presentations, Dept. of Physics and Astronomy

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