GRB 051008: A long, spectrally hard dust-obscured GRB in a lyman-break galaxy at z ≈ 2.8*

DOI: 
10.1093/mnras/stu999
Publication date: 
01/08/2014
Main author: 
Volnova A.A.
IAA authors: 
Gorosabel J.;Castro-Tirado A.J.;Postigo A.U.
Authors: 
Volnova A.A., Pozanenko A.S., Gorosabel J., Perley D.A., Frederiks D.D., Kann D.A., Rumyantsev V.V., Biryukov V.V., Burkhonov O., Castro-Tirado A.J., Ferrero P., Golenetskii S.V., Klose S., Loznikov V.M., Minaev P.Y., Stecklum B., Svinkin D.S., Tsvetkova A.E., Postigo A.U., Ulanov M.V.
Journal: 
Monthly Notices of the Royal Astronomical Society
Publication type: 
Article
Volume: 
442
Pages: 
2586-2599
Number: 
Abstract: 
We present observations of the dark gamma-ray burst GRB 051008 provided by Swift/BAT, Swift/XRT, Konus-WIND, INTEGRAL/SPI-ACS in the high-energy domain and the Shajn, Swift/UVOT, Tautenburg, NOT, Gemini and Keck I telescopes in the optical and near-infrared bands. The burst was detected only in gamma- and X-rays and neither a prompt optical nor a radio afterglow was detected down to deep limits. We identified the host galaxy of the burst, which is a typical Lyman-break galaxy (LBG) with R-magnitude of 24.06 ± 0.10 mag. A redshift of the galaxy of z = 2.77+0.15 -0.20 is measured photometrically due to the presence of a clear, strong Lyman-break feature. The host galaxy is a small starburst galaxy with moderate intrinsic extinction (AV = 0.3) and has a star formation rate of ~60M( yr-1 typical for LBGs. It is one of the few cases where a GRB host has been found to be a classical LBG. Using the redshift we estimate the isotropic-equivalent radiated energy of the burst to be Eiso = (1.15 ± 0.20) × 1054 erg.We also provide evidence in favour of the hypothesis that the darkness ofGRB051008 is due to local absorption resulting from a dense circumburst medium © 2014 The Authors.
Database: 
SCOPUS
WOK
ADS
URL: 
https://ui.adsabs.harvard.edu/#abs/2014MNRAS.442.2586V/abstract
ADS Bibcode: 
2014MNRAS.442.2586V
Keywords: 
Galaxies: distances and redshifts; Galaxies: high-redshift; Galaxies: photometry; Gamma-ray burst: individual: dark