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Mining Gamma-Ray Burst Data
Jon Hakkila, Richard J. Roiger, David J. Haglin +3
Gamma-ray bursts provide what is probably one of the messiest of all astrophysical data sets. Burst class properties are indistinct, as overlapping characteristics of individual bu…
Unsupervised Induction and Gamma-Ray Burst Classification
Richard J. Roiger, Jon Hakkila, David J. Haglin +2
We use ESX, a product of Information Acumen Corporation, to perform unsupervised learning on a data set containing 797 gamma-ray bursts taken from the BATSE 3B catalog. Assuming al…
The Fluence Duration Bias
Jon Hakkila, Charles A. Meegan, Geoffrey N. Pendleton +3
The fluence duration bias causes fluences and durations of faint gamma-ray bursts to be systematically underestimated relative to their peak fluxes. Using Monte Carlo analysis, we…
Properties of Gamma-Ray Burst Classes
Jon Hakkila, David J. Haglin, Richard J. Roiger +3
The three gamma-ray burst (GRB) classes identified by statistical clustering analysis (Mukherjee et al. 1998) are examined using the pattern recognition algorithm C4.5 (Quinlan 198…
Cosmological versus Intrinsic: The Correlation between Intensity and the Peak of the nu F_nu Spectrum of Gamma Ray Bursts
Nicole M. Lloyd-Ronning, Vahe' Petrosian, Robert S. Mallozzi
We present results of correlation studies, examining the association between the peak of the nu F_nu spectrum of gamma ray bursts, E_p, with the burst's energy fluence and photon p…
The BATSE Gamma-Ray Burst Spectral Catalog. I. High Time Resolution Spectroscopy of Bright Bursts using High Energy Resolution Data
R. D. Preece, M. S. Briggs, R. S. Mallozzi +3
This is the first in a series of gamma-ray burst spectroscopy catalogs from the Burst And Transient Source Experiment (BATSE) on the Compton Gamma Ray Observatory, each covering a…
The Role of the BATSE Instrument Response in Creating the Gamma-Ray Burst E-Peak Distribution
J. J. Brainerd, G. Pendleton, R. Mallozzi +2
All gamma-ray bursts are observed to have approximately the same characteristic gamma-ray energy. We show in this article that for bursts in the BATSE data set, this property as me…
The Fourth BATSE Gamma-Ray Burst Catalog (Revised)
W. S. Paciesas, C. A. Meegan, G. N. Pendleton +15
The Burst and Transient Source Experiment (BATSE) on the Compton Gamma Ray Observatory (CGRO) has triggered on 1637 cosmic gamma-ray bursts between 1991 April 19 and 1996 August 29…
The Synchrotron Shock Model Confronts a `Line of Death' in the BATSE Gamma-Ray Burst Data
R. D. Preece, M. S. Briggs, R. S. Mallozzi +3
The synchrotron shock model (SSM) for gamma-ray burst emission makes a testable prediction: that the observed low-energy power-law photon number spectral index cannot exceed -2/3 (…
AI Gamma-Ray Burst Classification: Methodology/Preliminary Results
Jon Hakkila, David J. Haglin, Richard J. Roiger +3
Artificial intelligence (AI) classifiers can be used to classify unknowns, refine existing classification parameters, and identify/screen out ineffectual parameters. We present an…
BATSE Observations of Gamma-Ray Burst Spectra. IV. Time-Resolved High-Energy Spectroscopy
R. D. Preece, G. N. Pendleton, M. S. Briggs +5
We report on the temporal behavior of the high-energy power law continuum component of gamma-ray burst spectra with data obtained by the Burst and Transient Source Experiment. We h…