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astro-ph2002★ 79 cited
How Sample Completeness Affects Gamma-Ray Burst Classification
Jon Hakkila, Timothy W. Giblin, Richard J. Roiger +3
Unsupervised pattern recognition algorithms support the existence of three gamma-ray burst classes; Class I (long, large fluence bursts of intermediate spectral hardness), Class II…
astro-ph2002★ 194 cited
Understanding the long-term spectral variability of Cygnus X-1 with BATSE and ASM observations
Andrzej A. Zdziarski, Juri Poutanen, William S. Paciesas +1
We present an analysis of all observations of Cygnus X-1 by the BATSE (20-300 keV) and by ASM (1.5-12 keV) until 2002 June, including 1200 days of simultaneous data. We find a numb…