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33 papers · 1 filter
Localization of Gamma-Ray Bursts using the Fermi Gamma-Ray Burst Monitor
V. Connaughton, M. S. Briggs, A. Goldstein +25
The Fermi Gamma-ray Burst Monitor (GBM) has detected over 1400 Gamma-Ray Bursts (GRBs) since it began science operations in July, 2008. We use a subset of over 300 GRBs localized b…
Synchrotron Cooling in Energetic Gamma-Ray Bursts Observed by the Fermi Gamma-Ray Burst Monitor
Hoi-Fung Yu, Jochen Greiner, Hendrik van Eerten +15
We study the time-resolved spectra of eight GRBs observed by Fermi GBM in its first five years of mission, with 1 keV - 1 MeV fluence erg cm and signal-…
High-Resolution X-Ray Spectroscopy of the Bursting Pulsar GRO J1744-28
N. Degenaar, J. M. Miller, F. A. Harrison +3
The bursting pulsar GRO J1744-28 is a Galactic low-mass X-ray binary that distinguishes itself by displaying type-II X-ray bursts: brief, bright flashes of X-ray emission that like…
Trigger Mechanism of Solar Subflares in a Braided Coronal Magnetic Structure
Sanjiv K. Tiwari, Caroline E. Alexander, Amy R. Winebarger +1
Fine-scale braiding of coronal magnetic loops by continuous footpoint motions may power coronal heating via nanoflares, which are spontaneous fine-scale bursts of internal reconnec…
Circular polarization in the optical afterglow of GRB 121024A
K. Wiersema, S. Covino, K. Toma +37
Gamma-ray bursts (GRBs) are most probably powered by collimated relativistic outflows (jets) from accreting black holes at cosmological distances. Bright afterglows are produced wh…
On the Area Expansion of Magnetic Flux-Tubes in Solar Active Regions
Jaroslav Dudik, Elena Dzifcakova, Jonathan W. Cirtain
We calculated the 3D distribution of the area expansion factors in a potential magnetic field extrapolated from the high-resolution \textit{Hinode}/SOT magnetogram of a quiescent a…