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Time-Integrated Searches for Point-like Sources of Neutrinos with the 40-String IceCube Detector
The IceCube Collaboration, R. Abbasi
We present the results of time-integrated searches for astrophysical neutrino sources in both the northern and southern skies. Data were collected using the partially-completed Ice…
On the High Energy Emission of the Short GRB 090510
Hao-Ning He, Xue-Feng Wu, Kenji Toma +2
Long-lived high-energy (>100MeV) emission, a common feature of most Fermi-LAT detected gamma-ray burst, is detected up to \sim 10^2 s in the short GRB 090510. We study the origin o…
Population III GRB Afterglows: Constraints on Stellar Masses and External Medium Densities
Kenji Toma, Takanori Sakamoto, Peter Meszaros
Population III stars are theoretically expected to be prominent around redshifts z ~ 20, consisting of mainly very massive stars with M_* >~ 10 M_sun$, but there is no direct obser…
Fermi observations of high-energy gamma-ray emission from GRB 090217A
Fermi-LAT, Fermi-GBM Collaborations
The Fermi observatory is advancing our knowledge of Gamma-Ray Bursts (GRBs) through pioneering observations at high energies, covering more than 7 decades in energy with the two on…
The afterglow and host galaxy of GRB 090205: evidence for a Ly-alpha emitter at z=4.65
P. D'Avanzo, M. Perri, D. Fugazza +17
Gamma-ray bursts have been proved to be detectable up to distances much larger than any other astrophysical object, providing the most effective way, complementary to ordinary surv…
Population III Gamma Ray Bursts
P. Meszaros, M. J. Rees
We discuss a model of Poynting-dominated gamma-ray bursts from the collapse of very massive first generation (pop. III) stars. From redshifts of order 20, the resulting relativisti…