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 29 November 2004
  • 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
Precursors in Swift Gamma Ray Bursts with Redshift
We study a sample of gamma-ray bursts detected by the Swift satellite with known redshift which show a precursor in the Swift BAT light curve. We analyze the spectra of the precursors and compareExpand
Short gamma-ray bursts: A review
Abstract Gamma-Ray Bursts (GRBs) are rapid, bright flashes of radiation peaking in the gamma-ray band occurring at an average rate of one event per day at cosmological distances. They areExpand
Population synthesis of gamma-ray bursts with precursor activity and the spinar paradigm
We study statistical properties of long gamma-ray bursts (GRBs) produced by the collapsing cores of WR stars in binary systems. Fast rotation of the cores enables a two-stage collapse scenario,Expand
Precursors in Short Gamma-Ray Bursts as a Possible Probe of Progenitors
We extract 18 candidate short gamma-ray bursts (SGRBs) with precursors from 660 SGRBs observed by {\em Fermi} and {\em Swift} satellites, and carry out a comprehensive analysis on their temporal andExpand
Characteristics of Two-episode Emission Patterns in Fermi Long Gamma-Ray Bursts
Two-episode emission components separated by quiescent gaps in the prompt emission of gamma-ray bursts (GRBs) have been observed in the {\em Swift} era, but there is a lack of spectral informationExpand
How to Switch a Gamma-Ray Burst On and Off through a Magnetar
One of the most elusive features of gamma-ray bursts (GRBs) is the sporadic emission prior to the main prompt event observed in at least ~15% of cases. These precursors have spectral and temporalExpand
Multiwavelength Observations of GRB 050820A: An Exceptionally Energetic Event Followed from Start to Finish
We present observations of the unusually bright and long γ-ray burst GRB 050820A, one of the best sampled broadband data sets in the Swift era. The γ-ray light curve is marked by a soft precursorExpand
Catalogue of isolated emission episodes in gamma-ray bursts from Fermi, Swift and BATSE
We report a comprehensive catalog of emission episodes within long gamma-ray bursts (GRBs) that are separated by a quiescent period during which gamma-ray emission falls below the background level.Expand
Short-Duration Gamma-Ray Bursts
Gamma-ray bursts (GRBs) display a bimodal duration distribution with a separation between the short- and long-duration bursts at about 2 s. The progenitors of long GRBs have been identified asExpand
Precursors of short gamma-ray bursts in the SPI-ACS/INTEGRAL experiment
We have analyzed the light curves of 519 short gamma-ray bursts (GRBs) detected in the SPI-ACS/INTEGRAL experiment from December 2002 toMay 2014 to search for precursors (a possible activity of theExpand
...
1
2
3
4
5
...

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 seenExpand
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 beExpand
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 chracterizedExpand
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) aboardExpand
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 furthestExpand
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. TheExpand
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 caseExpand
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 energyExpand
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, butExpand
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 variabilityExpand
...
1
2
3
...