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The Afterglows of Swift-era Gamma-Ray Bursts. I. Comparing pre-Swift and Swift era Long/Soft (Type II) GRB Optical Afterglows
D. A. Kann, S. Klose, B. Zhang +73
We have gathered optical photometry data from the literature on a large sample of Swift-era gamma-ray burst (GRB) afterglows including GRBs up to September 2009, for a total of 76…
A universal GRB photon energy-peak luminosity relation
R. Willingale, P. T. O'Brien, M. R. Goad +3
The energetics and emission mechanism of GRBs are not well understood. Here we demonstrate that the instantaneous peak flux or equivalent isotropic peak luminosity, L_iso ergs s^-1…
The population of GRB hosts
N. R. Tanvir, A. J. Levan
The properties of their hosts provide important clues to the progenitors of different classes of gamma-ray bursts (GRBs). The hosts themselves also constitute a sample of high-reds…
How common are long Gamma-Ray Bursts in the Local Universe?
Robert Chapman, Nial R. Tanvir, Robert S. Priddey +1
The two closest Gamma-Ray Bursts so far detected (GRBs 980425 & 060218) were both under-luminous, spectrally soft, long duration bursts with smooth, single-peaked light curves. Onl…
The host of GRB 060206: kinematics of a distant galaxy
Christina C. Thoene, Klaas Wiersema, Cedric Ledoux +13
We present early (starting 1.6h after the burst) WHT/ISIS optical spectroscopy of the afterglow of the gamma-ray burst GRB 060206 detecting a range of metal absorption lines and th…
GRB 060206 and the quandary of achromatic breaks in afterglow light curves
P. A. Curran, A. J. van der Horst, R. A. M. J. Wijers +20
Gamma-ray burst afterglow observations in the Swift era have a perceived lack of achromatic jet breaks compared to the BeppoSAX era. We present our multi-wavelength analysis of GRB…
GRB051022: physical parameters and extinction of a prototype dark burst
Evert Rol, Alexander van der Horst, Klaas Wiersema +19
GRB051022 was undetected to deep limits in early optical observations, but precise astrometry from radio and X-ray showed that it most likely originated in a galaxy at z~0.8. We re…
Spectroscopy and multiband photometry of the afterglow of intermediate duration gamma-ray burst 040924 and its host galaxy
K. Wiersema, A. J. van der Horst, D. A. Kann +19
We present optical photometry and spectroscopy of the afterglow and host galaxy of gamma-ray burst 040924. This GRB had a rather short duration of T90 ~2.4s, and a well sampled opt…
On the nature of the short duration GRB 050906
A. J. Levan, N. R. Tanvir, P. Jakobsson +12
We present deep optical and infrared observations of the short duration GRB 050906. Although no X-ray or optical/IR afterglow was discovered to deep limits, the error circle of the…
A case of mistaken identity? GRB 060912A and the nature of the long -- short GRB divide
A. J. Levan, P. Jakobsson, C. Hurkett +13
We investigate the origin of the GRB 060912A, which has observational properties that make its classification as either a long or short burst ambiguous. Short duration GRBs (SGRBs)…
Observations of GRBs at High Redshift
N. R. Tanvir, P. Jakobsson
The extreme luminosity of gamma-ray bursts (GRBs) and their afterglows means they are detectable, in principle, to very high redshifts. Although the redshift distribution of GRBs i…
The nature of the X-Ray Flash of August 24 2005
J. Sollerman, J. P. U. Fynbo, J. Gorosabel +23
We present comprehensive photometric R-band observations of the fading optical afterglow of the X-Ray Flash XRF050824, from 11 minutes to 104 days after the burst. The R-band light…