Precursor activity in bright, long BATSE gamma-ray bursts

@article{Lazzati2005PrecursorAI,
  title={Precursor activity in bright, long BATSE gamma-ray bursts},
  author={Davide Lazzati},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2005},
  volume={357},
  pages={722-731}
}
  • D. Lazzati
  • Published 2005
  • Physics
  • Monthly Notices of the Royal Astronomical Society
We study a sample of bright, long Burst and Transient Source Experiment (BATSE) gamma-ray burst (GRB) light curves in the 200 s before the detection of the GRB prompt emission. We find that in a sizable fraction of cases (∼20 per cent) there is evidence of emission above the background coming from the same direction as the GRB. This emission is characterized by a softer spectrum with respect to the main spectrum and contains a small fraction (0.1‐1 per cent) of the total event counts. The… Expand
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References

SHOWING 1-10 OF 21 REFERENCES
BATSE Observations of Gamma-Ray Burst Tails
With the discovery of low-energy radiation appearing to come from the site of gamma-ray bursts in the hours to weeks after the initial burst of gamma rays, it would appear that astronomers have seen… Expand
Precursors of Gamma-Ray Bursts: A Clue to the Burster's Nature
In relativistic strongly magnetized winds outflowing from the fast-rotating compact progenitors of gamma-ray bursts (GRBs), there are three regions where powerful high-frequency emission may be… Expand
BATSE observations of gamma-ray burst spectra. 2: Peak energy evolution in bright, long bursts
We investigate spectral evolution in 37 bright, long gamma-ray bursts observed with the Burst and Transient Source Experiment (BATSE) spectroscopy detectors. High-resolution spectra are chracterized… Expand
Prompt and Delayed Emission Properties of Gamma-Ray Bursts Observed with BeppoSAX
We investigated the spectral evolution in the 2-700 keV energy band of gamma-ray bursts (GRBs) detected by the Gamma-Ray Burst Monitor (GRBM) and localized with the Wide Field Cameras (WFCs) aboard… Expand
Bimodal distribution of the autocorrelation function in gamma-ray bursts
Gamma-ray bursts (GRBs) are sporadic flashes of light observed primarily in the gamma-ray band. Being the brightest explosions in the Universe since its birth, they are at present also the furthest… Expand
HETE Observations of the Gamma-Ray Burst GRB 030329: Evidence for an Underlying Soft X-Ray Component
An exceptionally intense gamma-ray burst, GRB 030329, was detected and localized by the instruments on board the High Energy Transient Explorer satellite (HETE) at 11:37:14 UT on 2003 March 29. The… Expand
Gamma-ray burst precursor activity as observed with BATSE
Gamma-ray burst time histories often consist of multiple episodes of emission with the count rate dropping to the background level between adjacent episodes. We define precursor activity as any case… Expand
Gamma-ray bursters at cosmological distances
It is proposed that some, perhaps most, gamma-ray bursters are at cosmological distances, like quasars, with a redshift of about 1 or 2. This proposition requires a release of supernova-like energy… Expand
A γ-ray burst preceded by X-ray activity
GAMMA-RAY bursts remain mysterious astrophysical phenomena. The discovery of cyclotron harmonics1–3 in their spectra is strong evidence that they originate from strongly magnetized neutron stars, but… Expand
Evidence for an Early High-Energy Afterglow Observed with BATSE from GRB 980923
In this Letter, we present the first evidence in the BATSE data for a prompt high-energy (25-300 keV) afterglow component from a γ-ray burst, GRB 980923. The event consists of rapid variability… Expand
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