Please use this identifier to cite or link to this item:
Title: The extreme, red afterglow of GRB 060923A: Distance or dust?
Authors: Tanvir, N. R.
Rol, E.
Starling, R. L. C.
O'Brien, P. T.
Levan, A. J.
Gorosabel, J.
Priddey, R. S.
Jakobsson, P.
Jarvis, M.
Malesani, D.
Hjorth, J.
Fynbo, J. P. U.
Milvang-Jensen, B.
Jaunsen, A. O.
Melandri, A.
Gomboc, A.
Fruchter, A. S.
Fernandes, C. A. C.
Wold, T.
First Published: Aug-2008
Publisher: Royal Astronomical Society (RAS)
Citation: Monthly Notices of the Royal Astronomical Society, 2008, 388 (4), pp. 1743-1750
Abstract: Gamma-ray bursts (GRBs) are powerful probes of the early Universe, but locating and identifying very distant GRBs remain challenging. We report here the discovery of the K-band afterglow of Swift GRB 060923A, imaged within the first hour post-burst, and the faintest so far found. It was not detected in any bluer bands to deep limits, making it a candidate very high-z burst (z≳ 11). However, our later-time optical imaging and spectroscopy reveal a faint galaxy coincident with the GRB position which, if it is the host, implies a more moderate redshift (most likely z≲ 2.8) and therefore that dust is the likely cause of the very red-afterglow colour. This being the case, it is one of the few instances so far found of a GRB afterglow with high-dust extinction.
DOI Link: 10.1111/j.1365-2966.2008.13496.x
ISSN: 0035-8711
eISSN: 1365-2966
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2008 the authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

Files in This Item:
File Description SizeFormat 
MNRAS-2008-Tanvir-1743-50.pdfPublished (publisher PDF) 370.32 kBAdobe PDFView/Open

Items in LRA are protected by copyright, with all rights reserved, unless otherwise indicated.