2010A&A...510A.105P


Query : 2010A&A...510A.105P

2010A&A...510A.105P - Astronomy and Astrophysics, volume 510, A105-105 (2010/2-1)

Detection of the high z GRB 080913 and its implications on progenitors and energy extraction mechanisms.

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. and CASTRO-TIRADO A.J.

Abstract (from CDS):

We present multiwavelength observations of one of the most distant gamma-ray bursts detected so far, GRB080913. 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. Multiwavelength X-ray, near IR and millimetre observations were made between 20.7h and ∼16.8-days after the event. 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 θ0>3° blast wave with an energy injection at ∼0.5 days carrying 5∼1052erg or approximately 12 times the initial energy of the blast wave. We find that GRB080913 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 (Mbh) are restricted within a relatively narrow range, such that (B/3x1016G) (Mbh/7M)∼1. Similar constraints on the central BH hold for collapsar-like progenitor systems if the BZ-mechanism works for the system at hand.

Abstract Copyright:

Journal keyword(s): stars: gamma-ray bursts: individual: GRB 080913 - techniques: photometric - Cosmology: observations

Simbad objects: 12

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Number of rows : 12
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 GRB 050911A gB 00 54 38.290 -38 50 58.50           ~ 60 0
2 GRB 050904 gB 00 54 50.794 +14 05 09.42           ~ 450 0
3 GRB 080913 gB 04 22 57.90 -25 07 38.6           ~ 182 0
4 QSO J0457-2324 QSO 04 57 03.1791422424 -23 24 52.021129572   18.85 18.5 16.56   ~ 364 1
5 GRB 060121 gB 09 09 51.930 +45 39 45.41           ~ 114 1
6 Fermi bn090423330 gB 09 55 33.19 +18 08 57.7           ~ 334 0
7 GRB 050509B gB 12 36 18.000 +29 01 24.00           ~ 295 1
8 GRB 050724 gB 16 24 44.400 -27 32 27.90     19.70     ~ 409 1
9 GRB 060502B gB 18 35 46.060 +52 37 51.45           ~ 133 1
10 EM* MWC 349 ** 20 32 45.499080 +40 39 36.74124   15.88 13.15 12.13   Bep 759 0
11 GRB 051221 gB 21 54 48.626 +16 53 27.16 19.49         ~ 334 1
12 GRB 050709 gB 23 01 26.960 -38 58 39.50           ~ 280 1

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2022.10.02-01:12:54

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