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Unveiling the Origin of GRB 090709A: Lack of Periodicity in a Reddened Cosmological Long-Duration Gamma-Ray Burst
S. B. Cenko, N. R. Butler, E. O. Ofek +15
We present broadband (gamma-ray, X-ray, near-infrared, optical, and radio) observations of the gamma-ray burst (GRB) 090709A and its afterglow in an effort to ascertain the origin…
The X-ray absorbing column densities of Swift Gamma-ray bursts
S. Campana, C. C. Thone, A. de Ugarte Postigo +3
Long gamma-ray bursts (GRBs) are associated with the explosion of massive stars in star forming regions. A large fraction of GRBs show intrinsic absorption as detected in optical s…
GRB 090313: X-shooter's first shot at a GRB
A. de Ugarte Postigo, P. Goldoni, C. C. Thöne +26
Context. X-shooter is the first second-generation instrument to become operative at the ESO Very Large Telescope (VLT). It is a broad-band medium-resolution spectrograph designed w…
Multi-wavelength observations of the energetic GRB 080810: detailed mapping of the broadband spectral evolution
K. L. Page, R. Willingale, E. Bissaldi +31
GRB 080810 was one of the first bursts to trigger both Swift and the Fermi Gamma-ray Space Telescope. It was subsequently monitored over the X-ray and UV/optical bands by Swift, in…
Low-Resolution Spectroscopy of Gamma-ray Burst Optical Afterglows: Biases in the Swift Sample and Characterization of the Absorbers
J. P. U. Fynbo, P. Jakobsson, J. X. Prochaska +39
(Abridged). We present a sample of 77 optical afterglows (OAs) of Swift detected GRBs for which spectroscopic follow-up observations have been secured. We provide linelists and equ…
A glimpse of the end of the dark ages: the gamma-ray burst of 23 April 2009 at redshift 8.3
N. R. Tanvir, D. B. Fox, A. J. Levan +59
It is thought that the first generations of massive stars in the Universe were an important, and quite possibly dominant, source of the ultra-violet radiation that reionized the hy…
Multi-wavelength observations of afterglow of GRB 080319B and the modeling constraints
S. B. Pandey, A. J. Castro-Tirado, M. Jelínek +24
We present observations of the afterglow of GRB 080319B at optical, mm and radio frequencies from a few hours to 67 days after the burst. Present observations along with other publ…
Near-infrared follow-up to the May 2008 activation of SGR 1627-41
A. de Ugarte Postigo, A. J. Castro-Tirado, S. Covino +3
On 28 May 2008, the Swift satellite detected the first reactivation of SGR 1627-41 since its discovery in 1998. Following this event we began an observing campaign in near infrared…