Improved correlation between the variability and peak luminosity of gamma-ray bursts |
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Authors: | Li-Xin Li, Bohdan Paczy ski |
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Affiliation: | Max-Planck-Institut für Astrophysik, 85741 Garching, Germany;Princeton University Observatory, Princeton, NJ 08544, USA |
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Abstract: | A new procedure for smoothing a gamma-ray burst (GRB) light curve and calculating its variability is presented. Applying the procedure to a sample of 25 long GRBs, we have obtained a very tight correlation between the variability and the peak luminosity. The only significant outlier in the sample is GRB 030329. With this outlier excluded, the data scatter is reduced by a factor of ∼3 compared to that of Guidorzi et al., measured by the deviation of fit. Possible causes for the outlier are discussed. |
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Keywords: | methods: data analysis gamma-rays: bursts |
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