Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/19018
Title: Detection of the high z GRB 080913 and its implications on progenitors and energy extraction mechanisms
Authors: Perez-Ramirez, D.
de Ugarte Postigo A
Gorosabel, J.
Aloy, M. A.
Johannesson, G.
Guerrero, M. A.
Osborne, J. P.
Page, K. L.
Warwick, R. S.
Horvath, I.
Veres, P.
Jelinek, M.
Kubanek, P.
Guziy, S.
Bremer, M.
Winters, J. M.
Riva, A.
Castro-Tirado, A. J.
First Published: 1-Feb-2010
Publisher: EDP Sciences for European Southern Observatory (ESO)
Citation: Astronomy & Astrophysics, 2010, 510
Abstract: Aims. We present multiwavelength observations of one of the most distant gamma-ray bursts detected so far, GRB 080913. Based on these observations, we consider whether it could be classified as a short-duration GRB and discuss the implications for the progenitor nature and energy extraction mechanisms. Methods. Multiwavelength X-ray, near IR and millimetre observations were made between 20.7 h and ~16.8 days after the event. Results. Whereas a very faint afterglow was seen at the 3.5m CAHA telescope in the nIR, the X-ray afterglow was clearly detected in both Swift and XMM-Newton observations. An upper limit is reported in the mm range. We have modeled the data assuming a collimated ≳ 3° blast wave with an energy injection at days carrying erg or approximately 12 times the initial energy of the blast wave. We find that GRB 080913 shares many of the gamma-ray diagnostics with the more recent burst GRB 090423 for being classified as short had they ocurred at low redshift. If the progenitor were a compact binary merger, it is likely composed by a NS and BH. The Blandford-Znajek (BZ) mechanism is the preferred one to extract energy from the central, maximally-rotating BH. Both the magnetic field close to the event horizon (B) and the BH mass () are restricted within a relatively narrow range, such that . Similar constraints on the central BH hold for collapsar-like progenitor systems if the BZ-mechanism works for the system at hand.
DOI Link: 10.1051/0004-6361/200811151
ISSN: 0004-6361
Links: http://hdl.handle.net/2381/19018
http://www.aanda.org/articles/aa/abs/2010/02/aa11151-08/aa11151-08.html
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2009 ESO. Reproduced with permission from Astronomy & Astrophysics, © ESO.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

Files in This Item:
File Description SizeFormat 
aa11151-08.pdfPublished (publisher PDF)626.88 kBAdobe PDFView/Open


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